{"id":2044,"date":"2013-10-29T23:02:07","date_gmt":"2013-10-29T14:02:07","guid":{"rendered":"http:\/\/lepetit-prince.net\/ios\/?p=2044"},"modified":"2013-10-29T23:02:07","modified_gmt":"2013-10-29T14:02:07","slug":"%e3%81%8a%e7%b5%b5%e6%9b%b8%e3%81%8d%e8%87%aa%e8%bb%a2%e8%bb%8a%e3%82%b3%e3%83%bc%e3%82%b9","status":"publish","type":"post","link":"https:\/\/lepetit-prince.net\/ios\/?p=2044","title":{"rendered":"\u304a\u7d75\u66f8\u304d\u81ea\u8ee2\u8eca\u30b3\u30fc\u30b9"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" alt=\"iPhone\u30c0\u30a6\u30f3\u30d2\u30eb\" src=\"https:\/\/lh3.googleusercontent.com\/-VHe3cZvvalE\/Um-7WSE6RPI\/AAAAAAAABNg\/thqw6suUJb8\/s288\/Screen%2520Shot%25202013-10-29%2520at%252010.42.09%2520PM.png\" title=\"iPhone\u30c0\u30a6\u30f3\u30d2\u30eb\" class=\"alignnone\" width=\"288\" height=\"210\" \/><\/p>\n<p><\/p>\n<p>\n\u6307\u3067\u63cf\u3044\u305f\u7dda\u306e\u4e0a\u3092\u30c1\u30e3\u30ea\u30f3\u30b3\u304c\u99c6\u3051\u4e0b\u308a\u3066\u3044\u304f\u3088\u3046\u306aiPhone\u30a2\u30d7\u30ea\u3092\u63cf\u3044\u3066\u307f\u307e\u3059\u3002\n<\/p>\n<p><\/p>\n<p>\n\u52d5\u4f5c\u30a4\u30e1\u30fc\u30b8<\/br><br \/>\nXcode\u304b\u3089iOS7 iPhone Simulator\u3067\u52d5\u304b\u3059\u3068\u3053\u3093\u306a\u611f\u3058\u306b\u306a\u308a\u307e\u3059\u3002\n<\/p>\n<p><!--more--><\/p>\n<p>\n<iframe loading=\"lazy\" title=\"Today&#039;s iOS sample no.315 - down hill\" width=\"620\" height=\"465\" src=\"https:\/\/www.youtube.com\/embed\/PATd96wFq50?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>\n\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\n<\/p>\n<p><\/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> BicycleLine : <span style=\"color: #703daa\">SKScene<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo\"><span style=\"color: #bb2ca2\">@property<\/span> <span style=\"color: #bb2ca2\">BOOL<\/span> contentCreated;<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa\"><span style=\"color: #bb2ca2\">@property<\/span><span style=\"color: #000000\"> <\/span>UIBezierPath<span style=\"color: #000000\"> *path;<\/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\"> BicycleLine<\/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: #4f8187\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span><span style=\"color: #bb2ca2\">if<\/span><span style=\"color: #000000\"> (!<\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\">.<\/span>contentCreated<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 \u00a0 \u00a0 <\/span>[<\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\"> <\/span>createSceneContents<span style=\"color: #000000\">];<\/span><\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #4f8187\"><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>contentCreated<span style=\"color: #000000\"> = <\/span><span style=\"color: #bb2ca2\">YES<\/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>}<\/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>)createSceneContents<\/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><span style=\"color: #78492a\">SKColor<\/span><span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">purpleColor<\/span><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: #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>createBicycleNode<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: #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>updateGround<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>SKLabelNode<span style=\"color: #000000\"> *start = [<\/span>SKLabelNode<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>start.<span style=\"color: #703daa\">name<\/span> = <span style=\"color: #d12f1b\">@&#8221;startBtn&#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>start.<span style=\"color: #703daa\">text<\/span> = <span style=\"color: #d12f1b\">@&#8221;Go!&#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>start.<span style=\"color: #703daa\">position<\/span> = <span style=\"color: #3d1d81\">CGPointMake<\/span>(<span style=\"color: #272ad8\">280<\/span>, <span style=\"color: #272ad8\">20<\/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>:start];<\/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>)createBicycleNode<\/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\">SKSpriteNode<\/span> *bicycleFrame = [<span style=\"color: #703daa\">SKSpriteNode<\/span> <span style=\"color: #3d1d81\">spriteNodeWithImageNamed<\/span>:<span style=\"color: #d12f1b\">@&#8221;bicycleframe&#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>bicycleFrame.<span style=\"color: #703daa\">position<\/span> = <span style=\"color: #3d1d81\">CGPointMake<\/span>(<span style=\"color: #272ad8\">260<\/span>, <span style=\"color: #272ad8\">450<\/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>bicycleFrame.<span style=\"color: #703daa\">physicsBody<\/span> = [<span style=\"color: #703daa\">SKPhysicsBody<\/span> <span style=\"color: #3d1d81\">bodyWithRectangleOfSize<\/span>:bicycleFrame.<span style=\"color: #703daa\">size<\/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>bicycleFrame.<\/span>physicsBody<span style=\"color: #000000\">.<\/span>linearDamping<span style=\"color: #000000\"> = <\/span><span style=\"color: #272ad8\">5.0<\/span><span style=\"color: #000000\">; <\/span><span style=\"color: #008400\">\/\/ move slow<\/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>bicycleFrame.<span style=\"color: #703daa\">physicsBody<\/span>.<span style=\"color: #703daa\">dynamic<\/span> = <span style=\"color: #bb2ca2\">NO<\/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>bicycleFrame.<span style=\"color: #703daa\">name<\/span> = <span style=\"color: #d12f1b\">@&#8221;bicycle&#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\">self<\/span> <span style=\"color: #3d1d81\">addChild<\/span>:bicycleFrame];<\/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\">CGPoint<\/span> center[] = {<\/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: #3d1d81\">CGPointMake<\/span>(bicycleFrame.<span style=\"color: #703daa\">position<\/span>.<span style=\"color: #703daa\">x<\/span> &#8211; bicycleFrame.<span style=\"color: #703daa\">size<\/span>.<span style=\"color: #703daa\">width<\/span>\/<span style=\"color: #272ad8\">2.0<\/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 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <\/span>bicycleFrame.<span style=\"color: #703daa\">position<\/span>.<span style=\"color: #703daa\">y<\/span> &#8211; bicycleFrame.<span style=\"color: #703daa\">size<\/span>.<span style=\"color: #703daa\">height<\/span>\/<span style=\"color: #272ad8\">2.0<\/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: #3d1d81\">CGPointMake<\/span>(bicycleFrame.<span style=\"color: #703daa\">position<\/span>.<span style=\"color: #703daa\">x<\/span> + bicycleFrame.<span style=\"color: #703daa\">size<\/span>.<span style=\"color: #703daa\">width<\/span>\/<span style=\"color: #272ad8\">2.0<\/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 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <\/span>bicycleFrame.<span style=\"color: #703daa\">position<\/span>.<span style=\"color: #703daa\">y<\/span> &#8211; bicycleFrame.<span style=\"color: #703daa\">size<\/span>.<span style=\"color: #703daa\">height<\/span>\/<span style=\"color: #272ad8\">2.0<\/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\"><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: #703daa\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span><\/span>SKSpriteNode<span style=\"color: #000000\"> *tire = [<\/span>SKSpriteNode<span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">spriteNodeWithImageNamed<\/span><span style=\"color: #000000\">:<\/span><span style=\"color: #d12f1b\">@&#8221;tire&#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 \u00a0 \u00a0 <\/span>tire.<span style=\"color: #703daa\">position<\/span> = <span style=\"color: #3d1d81\">CGPointMake<\/span>(center[i].<span style=\"color: #703daa\">x<\/span>, center[i].<span style=\"color: #703daa\">y<\/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 \u00a0 \u00a0 <\/span>tire.<\/span>physicsBody<span style=\"color: #000000\"> = [<\/span>SKPhysicsBody<span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">bodyWithCircleOfRadius<\/span><span style=\"color: #000000\">:tire.<\/span>size<span style=\"color: #000000\">.<\/span>width<span style=\"color: #000000\">\/<\/span><span style=\"color: #272ad8\">2.0<\/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>[<span style=\"color: #bb2ca2\">self<\/span> <span style=\"color: #3d1d81\">addChild<\/span>:tire];<\/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; color: #703daa\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span><\/span>SKPhysicsJointPin<span style=\"color: #000000\"> *pin = [<\/span>SKPhysicsJointPin<span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">jointWithBodyA<\/span><span style=\"color: #000000\">:bicycleFrame.<\/span>physicsBody<span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">bodyB<\/span><span style=\"color: #000000\">:tire.<\/span>physicsBody<span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">anchor<\/span><span style=\"color: #000000\">:center[i]];<\/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: #703daa\">physicsWorld<\/span> <span style=\"color: #3d1d81\">addJoint<\/span>:pin];<\/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>)updateGround<\/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\">SKShapeNode<\/span> *ground = (<span style=\"color: #703daa\">SKShapeNode<\/span>*)[<span style=\"color: #bb2ca2\">self<\/span> <span style=\"color: #3d1d81\">childNodeWithName<\/span>:<span style=\"color: #d12f1b\">@&#8221;ground&#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> (!ground) {<\/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>ground = [<span style=\"color: #703daa\">SKShapeNode<\/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 \u00a0 \u00a0 <\/span>ground.<span style=\"color: #703daa\">name<\/span> = <span style=\"color: #d12f1b\">@&#8221;ground&#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 \u00a0 \u00a0 <\/span>ground.<span style=\"color: #703daa\">physicsBody<\/span>.<span style=\"color: #703daa\">dynamic<\/span> = <span style=\"color: #bb2ca2\">NO<\/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: #3d1d81\">addChild<\/span>:ground];<\/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\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">if<\/span> (!<span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">path<\/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\">path<\/span> = [<span style=\"color: #703daa\">UIBezierPath<\/span> <span style=\"color: #3d1d81\">bezierPath<\/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\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span>ground.<span style=\"color: #703daa\">path<\/span> = <span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">path<\/span>.<span style=\"color: #703daa\">CGPath<\/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>)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\"><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; color: #3d1d81\"><span style=\"color: #000000\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 <\/span><\/span><span style=\"color: #bb2ca2\">if<\/span><span style=\"color: #000000\"> ([[<\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\"> <\/span>childNodeWithName<span style=\"color: #000000\">:<\/span><span style=\"color: #d12f1b\">@&#8221;startBtn&#8221;<\/span><span style=\"color: #000000\">] <\/span>containsPoint<span style=\"color: #000000\">:p]) {<\/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: #703daa\">SKNode<\/span> *node = [<span style=\"color: #bb2ca2\">self<\/span> <span style=\"color: #3d1d81\">childNodeWithName<\/span>:<span style=\"color: #d12f1b\">@&#8221;bicycle&#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 \u00a0 \u00a0 <\/span>node.<span style=\"color: #703daa\">physicsBody<\/span>.<span style=\"color: #703daa\">dynamic<\/span> = <span style=\"color: #bb2ca2\">YES<\/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: #703daa\">SKShapeNode<\/span> *ground = (<span style=\"color: #703daa\">SKShapeNode<\/span>*)[<span style=\"color: #bb2ca2\">self<\/span> <span style=\"color: #3d1d81\">childNodeWithName<\/span>:<span style=\"color: #d12f1b\">@&#8221;ground&#8221;<\/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 \u00a0 \u00a0 <\/span>ground.<\/span>physicsBody<span style=\"color: #000000\"> = [<\/span>SKPhysicsBody<span style=\"color: #000000\"> <\/span><span style=\"color: #3d1d81\">bodyWithEdgeChainFromPath<\/span><span style=\"color: #000000\">:<\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\">.<\/span><span style=\"color: #4f8187\">path<\/span><span style=\"color: #000000\">.<\/span>CGPath<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\"><span class=\"Apple-converted-space\">\u00a0 \u00a0 \u00a0 \u00a0 <\/span><span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">path<\/span> = [<span style=\"color: #703daa\">UIBezierPath<\/span> <span style=\"color: #3d1d81\">bezierPath<\/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\">path<\/span> <span style=\"color: #3d1d81\">moveToPoint<\/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 <\/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>)touchesMoved:(<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\"><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; color: #3d1d81\"><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\">path<\/span><span style=\"color: #000000\"> <\/span>addLineToPoint<span style=\"color: #000000\">:p];<\/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>updateGround<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>)didSimulatePhysics<\/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> *node = [<span style=\"color: #bb2ca2\">self<\/span> <span style=\"color: #3d1d81\">childNodeWithName<\/span>:<span style=\"color: #d12f1b\">@&#8221;bicycle&#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> (node.<span style=\"color: #703daa\">position<\/span>.<span style=\"color: #703daa\">x<\/span> &lt; <span style=\"color: #272ad8\">0<\/span> || node.<span style=\"color: #703daa\">position<\/span>.<span style=\"color: #703daa\">x<\/span> &gt; <span style=\"color: #272ad8\">320<\/span> || node.<span style=\"color: #703daa\">position<\/span>.<span style=\"color: #703daa\">y<\/span> &lt; <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 \u00a0 \u00a0 <\/span>[node <span style=\"color: #3d1d81\">removeFromParent<\/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 \u00a0 \u00a0 <\/span>[<\/span><span style=\"color: #bb2ca2\">self<\/span><span style=\"color: #000000\"> <\/span>createBicycleNode<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><span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #4f8187\">path<\/span> = <span style=\"color: #bb2ca2\">nil<\/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\">updateGround<\/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\">}<\/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; 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; 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\"><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; 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\">SKScene<\/span> *scene = [[<span style=\"color: #4f8187\">BicycleLine<\/span> <span style=\"color: #3d1d81\">alloc<\/span>] <span style=\"color: #3d1d81\">initWithSize<\/span>:<span style=\"color: #bb2ca2\">self<\/span>.<span style=\"color: #703daa\">view<\/span>.<span style=\"color: #703daa\">bounds<\/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; font: 11.0px Menlo\">}<\/p>\n<p style=\"margin: 0.0px 0.0px 0.0px 0.0px; 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