{"id":2853,"date":"2014-07-03T22:56:16","date_gmt":"2014-07-03T13:56:16","guid":{"rendered":"http:\/\/lepetit-prince.net\/ios\/?p=2853"},"modified":"2014-07-03T22:56:16","modified_gmt":"2014-07-03T13:56:16","slug":"%e3%81%8f%e3%82%8b%e3%81%8f%e3%82%8b%e6%88%a6%e8%bb%8a","status":"publish","type":"post","link":"https:\/\/lepetit-prince.net\/ios\/?p=2853","title":{"rendered":"\u304f\u308b\u304f\u308b\u6226\u8eca"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/-tDMfIk2sqPs\/U7VgsbAr8lI\/AAAAAAAACXg\/AKxoxRPDuD8\/s288\/Screen%2520Shot%25202014-07-03%2520at%252010.54.33%2520PM.png\" width=\"288\" height=\"181\" alt=\"iPhone\u56de\u8ee2\u30bf\u30f3\u30af\" class=\"alignnone\" \/><br \/>\n<\/p>\n<p>\n\u982d\u3092\u304f\u308b\u304f\u308b\u56de\u8ee2\u3055\u305b\u3066\u5f3e\u3092\u6253\u3061\u51fa\u3059iPhone\u30a2\u30d7\u30ea\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u63cf\u3044\u3066\u307f\u307e\u3059\u3002\n<\/p>\n<p><!--more--><\/p>\n<p>\n<iframe loading=\"lazy\" width=\"620\" height=\"349\" src=\"https:\/\/www.youtube.com\/embed\/XD4Qgagy9Hw?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #d12f1b\"><span style=\"color: #78492a\">#import <\/span>&#8220;ViewController.h&#8221;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #d12f1b\"><span style=\"color: #78492a\">#import <\/span>&lt;SpriteKit\/SpriteKit.h&gt;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span style=\"color: #bb2ca2\">@interface<\/span> TankScene : <span style=\"color: #703daa\">SKScene<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #bb2ca2\">@property<span style=\"color: #000000\"> (<\/span>nonatomic<span style=\"color: #000000\">) <\/span><span style=\"color: #703daa\">CGPoint<\/span><span style=\"color: #000000\"> touchPoint;<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #bb2ca2\">@property<span style=\"color: #000000\"> (<\/span>nonatomic<span style=\"color: #000000\">) <\/span>int<span style=\"color: #000000\"> turnHead;<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #bb2ca2\">@property<span style=\"color: #000000\"> (<\/span>nonatomic<span style=\"color: #000000\">, <\/span>strong<span style=\"color: #000000\">) <\/span><span style=\"color: #703daa\">NSMutableArray<\/span><span style=\"color: #000000\"> *timer;<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #bb2ca2\">@end<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #bb2ca2\">@implementation<span style=\"color: #000000\"> TankScene<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">&#8211; (<span style=\"color: #bb2ca2\">void<\/span>)didMoveToView:(<span style=\"color: #703daa\">SKView<\/span> *)view<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">{<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\">.<\/span>backgroundColor<span style=\"color: #000000\"> = [<\/span>UIColor<span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">colorWithWhite<\/span><span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0.9<\/span><span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">alpha<\/span><span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">1<\/span><span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\">.<\/span>physicsWorld<span style=\"color: #000000\">.<\/span>gravity<span style=\"color: #000000\"> = <\/span><span style=\"color: #3d1d81\">CGVectorMake<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #272ad8\">0<\/span><span style=\"color: #000000\">, <\/span><span style=\"color: #272ad8\">0<\/span><span style=\"color: #000000\">);<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\">.<\/span>physicsBody<span style=\"color: #000000\"> = [<\/span>SKPhysicsBody<span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">bodyWithEdgeLoopFromRect<\/span><span style=\"color: #000000\">:<\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\">.<\/span>frame<span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #31595d\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[<\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\"> <\/span>createTank<span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #31595d\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[<\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\"> <\/span>createTurnButton<span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\">.<\/span><span style=\"color: #4f8187\">timer<\/span><span style=\"color: #000000\"> = [<\/span>NSMutableArray<span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">array<\/span><span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">&#8211; (<span style=\"color: #bb2ca2\">void<\/span>)createTank<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">{<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #703daa\">SKNode<\/span> *tank = [<span style=\"color: #703daa\">SKNode<\/span> <span style=\"color: #3d1d81\">node<\/span>];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>tank.<span style=\"color: #703daa\">name<\/span> = <span style=\"color: #d12f1b\">@&#8221;tank&#8221;<\/span>;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>tank.<span style=\"color: #703daa\">position<\/span> = <span style=\"color: #3d1d81\">CGPointMake<\/span>(<span style=\"color: #272ad8\">160<\/span>, <span style=\"color: #272ad8\">80<\/span>);<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[<span style=\"color: #bb2ca2\">self<\/span> <span style=\"color: #3d1d81\">addChild<\/span>:tank];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span><span style=\"color: #703daa\">SKSpriteNode<\/span><span style=\"color: #000000\"> *body = [<\/span><span style=\"color: #703daa\">SKSpriteNode<\/span><span style=\"color: #000000\"> <\/span>spriteNodeWithColor<span style=\"color: #000000\">:[<\/span><span style=\"color: #78492a\">SKColor<\/span><span style=\"color: #000000\"> <\/span>colorWithRed<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0<\/span><span style=\"color: #000000\"> <\/span>green<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0.4<\/span><span style=\"color: #000000\"> <\/span>blue<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0<\/span><span style=\"color: #000000\"> <\/span>alpha<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">1<\/span><span style=\"color: #000000\">] <\/span>size<span style=\"color: #000000\">:<\/span>CGSizeMake<span style=\"color: #000000\">(<\/span><span style=\"color: #272ad8\">80<\/span><span style=\"color: #000000\">, <\/span><span style=\"color: #272ad8\">48<\/span><span style=\"color: #000000\">)];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[tank <span style=\"color: #3d1d81\">addChild<\/span>:body];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">for<\/span> (<span style=\"color: #bb2ca2\">int<\/span> i=<span style=\"color: #272ad8\">0<\/span>; i&lt;<span style=\"color: #272ad8\">2<\/span>; i++) {<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span><\/span><span style=\"color: #703daa\">SKSpriteNode<\/span><span style=\"color: #000000\"> *tire = [<\/span><span style=\"color: #703daa\">SKSpriteNode<\/span><span style=\"color: #000000\"> <\/span>spriteNodeWithColor<span style=\"color: #000000\">:[<\/span><span style=\"color: #78492a\">SKColor<\/span><span style=\"color: #000000\"> <\/span>darkGrayColor<span style=\"color: #000000\">] <\/span>size<span style=\"color: #000000\">:<\/span>CGSizeMake<span style=\"color: #000000\">(<\/span><span style=\"color: #272ad8\">85<\/span><span style=\"color: #000000\">, <\/span><span style=\"color: #272ad8\">15<\/span><span style=\"color: #000000\">)];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>tire.<span style=\"color: #703daa\">position<\/span> = <span style=\"color: #3d1d81\">CGPointMake<\/span>(<span style=\"color: #272ad8\">0<\/span>, i ? &#8211;<span style=\"color: #272ad8\">33<\/span> : <span style=\"color: #272ad8\">33<\/span>);<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>[tank <span style=\"color: #3d1d81\">addChild<\/span>:tire];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #703daa\">SKNode<\/span> *head = [<span style=\"color: #703daa\">SKNode<\/span> <span style=\"color: #3d1d81\">node<\/span>];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>head.<span style=\"color: #703daa\">name<\/span> = <span style=\"color: #d12f1b\">@&#8221;head&#8221;<\/span>;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[tank <span style=\"color: #3d1d81\">addChild<\/span>:head];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span><span style=\"color: #703daa\">UIBezierPath<\/span><span style=\"color: #000000\"> *path = [<\/span><span style=\"color: #703daa\">UIBezierPath<\/span><span style=\"color: #000000\"> <\/span>bezierPathWithArcCenter<span style=\"color: #000000\">:<\/span><span style=\"color: #703daa\">CGPointZero<\/span><span style=\"color: #000000\"> <\/span>radius<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">30<\/span><span style=\"color: #000000\"> <\/span>startAngle<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0<\/span><span style=\"color: #000000\"> <\/span>endAngle<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">2.0<\/span><span style=\"color: #000000\">*<\/span><span style=\"color: #78492a\">M_PI<\/span><span style=\"color: #000000\"> <\/span>clockwise<span style=\"color: #000000\">:<\/span><span style=\"color: #bb2ca2\">NO<\/span><span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span>SKShapeNode<span style=\"color: #000000\"> *circle = [<\/span>SKShapeNode<span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">node<\/span><span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>circle.<span style=\"color: #703daa\">path<\/span> = path.<span style=\"color: #703daa\">CGPath<\/span>;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>circle.<\/span><span style=\"color: #703daa\">fillColor<\/span><span style=\"color: #000000\"> = [<\/span><span style=\"color: #703daa\">UIColor<\/span><span style=\"color: #000000\"> <\/span>colorWithRed<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0<\/span><span style=\"color: #000000\"> <\/span>green<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0.6<\/span><span style=\"color: #000000\"> <\/span>blue<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0<\/span><span style=\"color: #000000\"> <\/span>alpha<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">1<\/span><span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[head <span style=\"color: #3d1d81\">addChild<\/span>:circle];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span><span style=\"color: #703daa\">SKSpriteNode<\/span><span style=\"color: #000000\"> *port = [<\/span><span style=\"color: #703daa\">SKSpriteNode<\/span><span style=\"color: #000000\"> <\/span>spriteNodeWithColor<span style=\"color: #000000\">:[<\/span><span style=\"color: #78492a\">SKColor<\/span><span style=\"color: #000000\"> <\/span>colorWithRed<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0<\/span><span style=\"color: #000000\"> <\/span>green<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0.6<\/span><span style=\"color: #000000\"> <\/span>blue<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0<\/span><span style=\"color: #000000\"> <\/span>alpha<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">1<\/span><span style=\"color: #000000\">] <\/span>size<span style=\"color: #000000\">:<\/span>CGSizeMake<span style=\"color: #000000\">(<\/span><span style=\"color: #272ad8\">15<\/span><span style=\"color: #000000\">, <\/span><span style=\"color: #272ad8\">40<\/span><span style=\"color: #000000\">)];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>port.<span style=\"color: #703daa\">position<\/span> = <span style=\"color: #3d1d81\">CGPointMake<\/span>(<span style=\"color: #272ad8\">0<\/span>, <span style=\"color: #272ad8\">40<\/span>);<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[head <span style=\"color: #3d1d81\">addChild<\/span>:port];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>tank.<\/span>physicsBody<span style=\"color: #000000\"> = [<\/span>SKPhysicsBody<span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">bodyWithRectangleOfSize<\/span><span style=\"color: #000000\">:body.<\/span>size<span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">&#8211; (<span style=\"color: #bb2ca2\">void<\/span>)createTurnButton<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">{<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span><span style=\"color: #703daa\">UIBezierPath<\/span><span style=\"color: #000000\"> *path = [<\/span><span style=\"color: #703daa\">UIBezierPath<\/span><span style=\"color: #000000\"> <\/span>bezierPathWithArcCenter<span style=\"color: #000000\">:<\/span><span style=\"color: #703daa\">CGPointZero<\/span><span style=\"color: #000000\"> <\/span>radius<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">70<\/span><span style=\"color: #000000\"> <\/span>startAngle<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0<\/span><span style=\"color: #000000\"> <\/span>endAngle<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">2.0<\/span><span style=\"color: #000000\"> * <\/span><span style=\"color: #78492a\">M_PI<\/span><span style=\"color: #000000\"> <\/span>clockwise<span style=\"color: #000000\">:<\/span><span style=\"color: #bb2ca2\">NO<\/span><span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span>SKShapeNode<span style=\"color: #000000\"> *btn = [<\/span>SKShapeNode<span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">node<\/span><span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>btn.<span style=\"color: #703daa\">position<\/span> = <span style=\"color: #3d1d81\">CGPointMake<\/span>(<span style=\"color: #272ad8\">320<\/span>, <span style=\"color: #272ad8\">0<\/span>);<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>btn.<\/span><span style=\"color: #703daa\">fillColor<\/span><span style=\"color: #000000\"> = [<\/span><span style=\"color: #78492a\">SKColor<\/span><span style=\"color: #000000\"> <\/span>colorWithRed<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0.3<\/span><span style=\"color: #000000\"> <\/span>green<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0.6<\/span><span style=\"color: #000000\"> <\/span>blue<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">0.6<\/span><span style=\"color: #000000\"> <\/span>alpha<span style=\"color: #000000\">:<\/span><span style=\"color: #272ad8\">1<\/span><span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>btn.<span style=\"color: #703daa\">path<\/span> = path.<span style=\"color: #703daa\">CGPath<\/span>;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[<span style=\"color: #bb2ca2\">self<\/span> <span style=\"color: #3d1d81\">addChild<\/span>:btn];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>btn.<span style=\"color: #703daa\">name<\/span> = <span style=\"color: #d12f1b\">@&#8221;turn&#8221;<\/span>;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">&#8211; (<span style=\"color: #bb2ca2\">void<\/span>)tick<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">{<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">int<\/span> count = <span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">timer<\/span>.<span style=\"color: #3d1d81\">count<\/span>;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">if<\/span> (count &gt; <span style=\"color: #272ad8\">60<\/span>) {<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>[<span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">timer<\/span> <span style=\"color: #3d1d81\">enumerateObjectsUsingBlock<\/span>:^(<span style=\"color: #703daa\">SKNode<\/span> *n, <span style=\"color: #703daa\">NSUInteger<\/span> idx, <span style=\"color: #bb2ca2\">BOOL<\/span> *stop) {<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <\/span>[n <span style=\"color: #3d1d81\">removeFromParent<\/span>];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>}];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0 \u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>[<span style=\"color: #bb2ca2\">self<\/span> <span style=\"color: #31595d\">shoot<\/span>];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>[<\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\">.<\/span><span style=\"color: #4f8187\">timer<\/span><span style=\"color: #000000\"> <\/span>removeAllObjects<span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>} <span style=\"color: #bb2ca2\">else<\/span> {<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span><\/span><span style=\"color: #703daa\">SKSpriteNode<\/span><span style=\"color: #000000\"> *n = [<\/span><span style=\"color: #703daa\">SKSpriteNode<\/span><span style=\"color: #000000\"> <\/span>spriteNodeWithColor<span style=\"color: #000000\">:[<\/span><span style=\"color: #78492a\">SKColor<\/span><span style=\"color: #000000\"> <\/span>redColor<span style=\"color: #000000\">] <\/span>size<span style=\"color: #000000\">:<\/span>CGSizeMake<span style=\"color: #000000\">(<\/span><span style=\"color: #272ad8\">30<\/span><span style=\"color: #000000\">, <\/span><span style=\"color: #272ad8\">5<\/span><span style=\"color: #000000\">)];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>n.<span style=\"color: #703daa\">position<\/span> = <span style=\"color: #3d1d81\">CGPointMake<\/span>(<span style=\"color: #272ad8\">300<\/span>, <span style=\"color: #272ad8\">100<\/span> + <span style=\"color: #272ad8\">5<\/span> * count);<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>[<span style=\"color: #bb2ca2\">self<\/span> <span style=\"color: #3d1d81\">addChild<\/span>:n];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>[<span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">timer<\/span> <span style=\"color: #3d1d81\">addObject<\/span>:n];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">&#8211; (<span style=\"color: #bb2ca2\">void<\/span>)shoot<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">{<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #703daa\">SKNode<\/span> *tank = [<span style=\"color: #bb2ca2\">self<\/span> <span style=\"color: #3d1d81\">childNodeWithName<\/span>:<span style=\"color: #d12f1b\">@&#8221;tank&#8221;<\/span>];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #703daa\">SKNode<\/span> *head = [tank <span style=\"color: #3d1d81\">childNodeWithName<\/span>:<span style=\"color: #d12f1b\">@&#8221;head&#8221;<\/span>];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span><span style=\"color: #703daa\">SKSpriteNode<\/span><span style=\"color: #000000\"> *ball = [<\/span><span style=\"color: #703daa\">SKSpriteNode<\/span><span style=\"color: #000000\"> <\/span>spriteNodeWithColor<span style=\"color: #000000\">:[<\/span><span style=\"color: #703daa\">UIColor<\/span><span style=\"color: #000000\"> <\/span>blackColor<span style=\"color: #000000\">] <\/span>size<span style=\"color: #000000\">:<\/span>CGSizeMake<span style=\"color: #000000\">(<\/span><span style=\"color: #272ad8\">10<\/span><span style=\"color: #000000\">, <\/span><span style=\"color: #272ad8\">10<\/span><span style=\"color: #000000\">)];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">float<\/span> angle = head.<span style=\"color: #703daa\">zRotation<\/span> + <span style=\"color: #78492a\">M_PI<\/span> * <span style=\"color: #272ad8\">0.5<\/span>;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">float<\/span> x = tank.<span style=\"color: #703daa\">position<\/span>.<span style=\"color: #703daa\">x<\/span> + <span style=\"color: #272ad8\">70<\/span> * <span style=\"color: #3d1d81\">cos<\/span>(angle);<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">float<\/span> y = tank.<span style=\"color: #703daa\">position<\/span>.<span style=\"color: #703daa\">y<\/span> + <span style=\"color: #272ad8\">70<\/span> * <span style=\"color: #3d1d81\">sin<\/span>(angle);<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>ball.<span style=\"color: #703daa\">position<\/span> = <span style=\"color: #3d1d81\">CGPointMake<\/span>(x, y);<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>ball.<\/span>physicsBody<span style=\"color: #000000\"> = [<\/span>SKPhysicsBody<span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">bodyWithRectangleOfSize<\/span><span style=\"color: #000000\">:ball.<\/span>size<span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[<span style=\"color: #bb2ca2\">self<\/span> <span style=\"color: #3d1d81\">addChild<\/span>:ball];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[ball.<span style=\"color: #703daa\">physicsBody<\/span> <span style=\"color: #3d1d81\">applyImpulse<\/span>:<span style=\"color: #3d1d81\">CGVectorMake<\/span>(<span style=\"color: #3d1d81\">cos<\/span>(angle), <span style=\"color: #3d1d81\">sin<\/span>(angle))];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">&#8211; (<span style=\"color: #bb2ca2\">void<\/span>)touchesBegan:(<span style=\"color: #703daa\">NSSet<\/span> *)touches withEvent:(<span style=\"color: #703daa\">UIEvent<\/span> *)event<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">{<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span>SKShapeNode<span style=\"color: #000000\"> *btn = (<\/span>SKShapeNode<span style=\"color: #000000\"> *)[<\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">childNodeWithName<\/span><span style=\"color: #000000\">:<\/span><span style=\"color: #d12f1b\">@&#8221;turn&#8221;<\/span><span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #703daa\">CGPoint<\/span> p = [[touches <span style=\"color: #3d1d81\">anyObject<\/span>] <span style=\"color: #3d1d81\">locationInNode<\/span>:<span style=\"color: #bb2ca2\">self<\/span>];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">if<\/span> ([btn <span style=\"color: #3d1d81\">containsPoint<\/span>:p]) {<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>btn.<span style=\"color: #703daa\">alpha<\/span> = (btn.<span style=\"color: #703daa\">alpha<\/span> == <span style=\"color: #272ad8\">1.0<\/span>) ? <span style=\"color: #272ad8\">0.7<\/span> : <span style=\"color: #272ad8\">1.0<\/span>;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">turnHead<\/span> = (<span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">turnHead<\/span> + <span style=\"color: #272ad8\">1<\/span>) % <span style=\"color: #272ad8\">4<\/span>;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">return<\/span>;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">touchPoint<\/span> = p;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">&#8211; (<span style=\"color: #bb2ca2\">void<\/span>)update:(<span style=\"color: #703daa\">NSTimeInterval<\/span>)currentTime<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">{<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #703daa\">SKNode<\/span> *tank = [<span style=\"color: #bb2ca2\">self<\/span> <span style=\"color: #3d1d81\">childNodeWithName<\/span>:<span style=\"color: #d12f1b\">@&#8221;tank&#8221;<\/span>];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">float<\/span> dx = tank.<span style=\"color: #703daa\">position<\/span>.<span style=\"color: #703daa\">x<\/span> &#8211; <span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">touchPoint<\/span>.<span style=\"color: #703daa\">x<\/span>;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">if<\/span> (dx != <span style=\"color: #272ad8\">0<\/span> &amp;&amp; !<span style=\"color: #78492a\">CGPointEqualToPoint<\/span>(<span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">touchPoint<\/span>, <span style=\"color: #703daa\">CGPointZero<\/span>)) {<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>tank.<span style=\"color: #703daa\">physicsBody<\/span>.<span style=\"color: #703daa\">velocity<\/span> = <span style=\"color: #3d1d81\">CGVectorMake<\/span>(dx &gt; <span style=\"color: #272ad8\">0<\/span> ? &#8211;<span style=\"color: #272ad8\">10<\/span> : <span style=\"color: #272ad8\">10<\/span>, <span style=\"color: #272ad8\">0<\/span>);<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #703daa\">SKNode<\/span> *head = [tank <span style=\"color: #3d1d81\">childNodeWithName<\/span>:<span style=\"color: #d12f1b\">@&#8221;head&#8221;<\/span>];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">if<\/span> (<span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">turnHead<\/span> % <span style=\"color: #272ad8\">2<\/span> == <span style=\"color: #272ad8\">1<\/span>) {<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span>head.<span style=\"color: #703daa\">zRotation<\/span> += (<span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">turnHead<\/span>==<span style=\"color: #272ad8\">1<\/span>) ? <span style=\"color: #272ad8\">0.01<\/span> : &#8211;<span style=\"color: #272ad8\">0.01<\/span>;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[<span style=\"color: #bb2ca2\">self<\/span> <span style=\"color: #31595d\">tick<\/span>];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #bb2ca2\">@end<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #4f8187\"><span style=\"color: #bb2ca2\">@interface<\/span><span style=\"color: #000000\"> <\/span>ViewController<span style=\"color: #000000\"> ()<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #bb2ca2\">@end<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span style=\"color: #bb2ca2\">@implementation<\/span> ViewController<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">&#8211; (<span style=\"color: #bb2ca2\">void<\/span>)viewDidLoad<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">{<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[<\/span><span style=\"color: #bb2ca2\">super<\/span><span style=\"color: #000000\"> <\/span>viewDidLoad<span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><span class=\"Apple-converted-space\">\u00a0\u00a0 \u00a0<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #703daa\">SKView<\/span> *spriteView = [[<span style=\"color: #703daa\">SKView<\/span> <span style=\"color: #3d1d81\">alloc<\/span>] <span style=\"color: #3d1d81\">initWithFrame<\/span>:<span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #703daa\">view<\/span>.<span style=\"color: #703daa\">bounds<\/span>];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[<span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #703daa\">view<\/span> <span style=\"color: #3d1d81\">addSubview<\/span>:spriteView];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #703daa\">SKScene<\/span> *scene = [[<span style=\"color: #4f8187\">TankScene<\/span> <span style=\"color: #3d1d81\">alloc<\/span>] <span style=\"color: #3d1d81\">initWithSize<\/span>:spriteView.<span style=\"color: #703daa\">frame<\/span>.<span style=\"color: #703daa\">size<\/span>];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[spriteView <span style=\"color: #3d1d81\">presentScene<\/span>:scene];<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; min-height: 13.0px\"><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">&#8211; (<span style=\"color: #bb2ca2\">void<\/span>)didReceiveMemoryWarning<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\">{<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3d1d81\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>[<\/span><span style=\"color: #bb2ca2\">super<\/span><span style=\"color: #000000\"> <\/span>didReceiveMemoryWarning<span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #008400\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span>\/\/ Dispose of any resources that can be recreated.<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; 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