４つあるボタンのどれかを押すと、他のボタンがぼかされる。というiPhoneアプリを描いてみます。(SpriteKit使ってます。ぼかし処理は重いです。)
動作イメージ
XcodeからiOS7 iPhone Simulatorで動かすとこんな感じになります。
サンプルコード
#import “ViewController.h”
#import <SpriteKit/SpriteKit.h>
@interface TextEffectScene : SKScene
@property BOOL contentCreated;
@property (strong, nonatomic) SKEffectNode *blurEffectNode;
@end
@implementation TextEffectScene
@synthesize blurEffectNode;
– (void)didMoveToView:(SKView *)view
{
if (!self.contentCreated) {
[self createSceneContents];
self.contentCreated = YES;
}
}
– (void)createSceneContents
{
CIFilter *filter = [CIFilter filterWithName:@”CIGaussianBlur”];
[filter setDefaults];
[filter setValue:@8 forKey:@”inputRadius”];
blurEffectNode = [[SKEffectNode alloc] init];
blurEffectNode.blendMode = SKBlendModeMultiply;
blurEffectNode.filter = filter;
[self addChild:blurEffectNode];
[self createIcon:@”First” point:CGPointMake(50, 300) color:[SKColor greenColor]];
[self createIcon:@”Second” point:CGPointMake(200, 300) color:[SKColor yellowColor]];
[self createIcon:@”Third” point:CGPointMake(50, 100) color:[SKColor redColor]];
[self createIcon:@”Fourth” point:CGPointMake(200, 100) color:[SKColor blueColor]];
}
– (void)createIcon:(NSString*)text point:(CGPoint)p color:(SKColor*)color
{
SKSpriteNode *box = [SKSpriteNode spriteNodeWithColor:[SKColor clearColor] size:CGSizeMake(60, 80)];
box.position = p;
box.name = @”iconbox”;
[self addChild:box];
SKShapeNode *icon = [[SKShapeNode alloc] init];
UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 20, 60, 60) cornerRadius:5];
[path appendPath:[UIBezierPath bezierPathWithRect:CGRectMake(5, 65, 10, 10)]];
[path appendPath:[UIBezierPath bezierPathWithRect:CGRectMake(45, 65, 10, 10)]];
icon.path = path.CGPath;
icon.fillColor = color;
icon.strokeColor = [SKColor whiteColor];
icon.lineWidth = 1;
[box addChild:icon];
SKLabelNode *initial = [[SKLabelNode alloc] init];
initial.text = [text substringToIndex:1];
initial.fontSize = 50;
initial.position = CGPointMake(30, 20);
[box addChild:initial];
SKLabelNode *iconName = [[SKLabelNode alloc] init];
iconName.text = text;
iconName.fontSize = 20;
iconName.position = CGPointMake(30, 0);
[box addChild:iconName];
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint p = [[touches anyObject] locationInNode:self];
[self enumerateChildNodesWithName:@”iconbox” usingBlock:^(SKNode *node, BOOL *stop) {
if ([node containsPoint:p]) {
[self performSelector:@selector(reset:) withObject:[NSValue valueWithCGPoint:node.position] afterDelay:2.0];
SKAction *move = [SKAction moveTo:CGPointMake(130, 200) duration:0.4];
[node runAction:move];
} else {
[self performSelector:@selector(blur:) withObject:node afterDelay:0.5];
}
}];
}
– (void)blur:(SKNode*)node
{
[node removeFromParent];
[blurEffectNode addChild:node];
}
– (void)reset:(NSValue*)point
{
[self enumerateChildNodesWithName:@”iconbox” usingBlock:^(SKNode *node, BOOL *stop) {
node.position = [point CGPointValue];
}];
[blurEffectNode enumerateChildNodesWithName:@”iconbox” usingBlock:^(SKNode *node, BOOL *stop) {
[node removeFromParent];
[self addChild:node];
}];
}
@end
@interface ViewController ()
@end
@implementation ViewController
– (void)viewDidLoad
{
[super viewDidLoad];
SKView *spriteView = [[SKView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:spriteView];
SKScene *scene = [[TextEffectScene alloc] initWithSize:self.view.bounds.size];
[spriteView presentScene:scene];
}
– (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end