Cocos2d中的触摸精灵

Question

我试图创建一个可以检测触摸的扩展CCSprite类。我做了一些研究，并在http://anny.fm/c/iphone/cocos2d/TouchableSprite/上发现了一个由Anny在本论坛主题http://www.cocos2d-iphone.org/forum/topic/3196（最新文章）中创建的示例。

使用这个我已经安装我的课像这样：

页眉

#import <Foundation/Foundation.h> 
#import "cocos2d.h" 

@interface PianoKey : CCSprite <CCTargetedTouchDelegate> { 

} 

-(BOOL) tsTouchBegan:  (UITouch*)touch withEvent: (UIEvent*)event; 
-(void) tsTouchMoved:  (UITouch*)touch withEvent: (UIEvent*)event; 
-(void) tsTouchEnded:  (UITouch*)touch withEvent: (UIEvent*)event; 
-(void) tsTouchCancelled: (UITouch*)touch withEvent: (UIEvent*)event; 

@end 

和实施...

@implementation PianoKey 

-(id)initWithKey:(int)key { 
if((self = [super initWithFile:[NSString stringWithFormat:@"key_%i.png",key]])) { 

} 
return self; 
} 


-(BOOL) tsTouchBegan:(UITouch*)touch withEvent: (UIEvent*)event { 
NSLog(@"tsTouchBegan"); 
return YES; 
} 
-(void) tsTouchMoved:(UITouch*)touch withEvent: (UIEvent*)event { 
NSLog(@"tsTouchMoved"); 

} 
-(void) tsTouchEnded:(UITouch*)touch withEvent: (UIEvent*)event { 
NSLog(@"tsTouchEnded"); 

} 
-(void) tsTouchCancelled:(UITouch*)touch withEvent: (UIEvent*)event { 
NSLog(@"tsTouchCancelled"); 
} 

// 
// Utilities. Don't override these unless you really need to. 
// 

-(CGRect) rect { 
CGSize s = [self.texture contentSize]; 
return CGRectMake(-s.width/2, -s.height/2, s.width, s.height); 
} 

-(BOOL) didTouch: (UITouch*)touch { 
return CGRectContainsPoint([self rect], [self convertTouchToNodeSpaceAR: touch]); 
} 

// 
// The actual touch listener functions. Don't override these either. 
// 

-(BOOL) ccTouchBegan:(UITouch*)touch withEvent: (UIEvent*)event { 
    NSLog(@"attempting touch."); 
    if([self didTouch: touch]) { 
     return [self tsTouchBegan:touch withEvent: event]; 
    } 
return NO; 
} 
-(void) ccTouchMoved:  (UITouch*)touch withEvent: (UIEvent*)event { if([self didTouch: touch])  [self tsTouchMoved:  touch withEvent: event]; } 
-(void) ccTouchEnded:  (UITouch*)touch withEvent: (UIEvent*)event { if([self didTouch: touch])  [self tsTouchEnded:  touch withEvent: event]; } 
-(void) ccTouchCancelled: (UITouch*)touch withEvent: (UIEvent*)event { if([self didTouch: touch])  [self tsTouchCancelled: touch withEvent: event]; } 

@end 

我明白了上面的方法，例如，如果检测到的触摸是在精灵的范围内，但我坚持为什么我没有得到任何响应，当我点击键。我是新来实施CCTargetdTouchDelegate所以我想它可能是做与...

Answer 1

你并不需要有针对性的触摸代表，它只是分裂触摸到个人ccTouchXXX消息的NSSet。您的实现仅仅缺乏CCTargetedTouchHandler的注册和注销。这通常是在的OnEnter完成的，因此，它与任何节点类型，而不仅仅是CCLayer：

-(void) onEnter 
{ 
    [super onEnter]; 
    [[TouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:INT_MIN+1 swallowsTouches:YES]; 
} 

-(void) dealloc 
{ 
    [[TouchDispatcher sharedDispatcher] removeDelegate:self]; 
    [super dealloc]; 
} 

顺便说一句，Kobold2D已经有一个扩展CCNode类，它可以测试，如果触摸是一个节点上（精灵，标签等），通过这个测试：

[node containsTouch:uiTouch]; 

只是说你不会有做这一切工作。 ;）