CGRect和touch

Question

在這個cocos2d應用程序中，當我按下ccsprite時nslog不會觸發。有人能幫助我嗎？

-(BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event{ 
NSMutableArray *targetsToDelete = [[NSMutableArray alloc] init]; 
for (CCSprite *target in _targets) { 
    CGRect targetRect = CGRectMake(target.position.x - (target.contentSize.width/2), 
            target.position.y - (target.contentSize.height/2), 
            27, 
            40); 


CGPoint touchLocation = [self convertTouchToNodeSpace:touch]; 
if (CGRectContainsPoint(targetRect, touchLocation)) {    
    NSLog(@"Moo cheese!"); 
    } 
} 
return YES; 
} 

Answer 1

在層init方法添加此

self.isTouchEnabled = true; 

使用此代碼用於觸摸檢測

- (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    UITouch *myTouch = [touches anyObject]; 
    CGPoint location = [myTouch locationInView:[myTouch view]]; 
    location = [[CCDirector sharedDirector] convertToGL:location]; 

    CGRect rect = [self getSpriteRect:yourSprite]; 

    if (CGRectContainsPoint(rect, location)) 
    { 
     NSLog(@"Sprite touched\n"); 
    } 

} 

要獲得精靈的rect：

-(CGRect)getSpriteRect:(CCNode *)inSprite 
{ 
    CGRect sprRect = CGRectMake(
           inSprite.position.x - inSprite.contentSize.width*inSprite.anchorPoint.x, 
           inSprite.position.y - inSprite.contentSize.height*inSprite.anchorPoint.y, 
           inSprite.contentSize.width, 
           inSprite.contentSize.height 
           ); 

    return sprRect; 
} 

Answer 2

首先，要確保你註冊觸摸精靈進入onEnter方法，例如：

- (void)onEnter 
{ 
    [[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:defaultTouchPriority_ swallowsTouches:YES]; 
    [super onEnter]; 
} 

這會讓你的精靈可觸摸等事件，當用戶觸發的精靈將按下它。 然後重構代碼，使其更具可讀性和類似的測試的東西：

- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event 
{ 
    CGPoint touchLocation = [self convertTouchToNodeSpace:touch]; 

    NSArray *targetsToDelete = [self touchedSpritesAtLocation:touchLocation]; 

    // Put your code here 
    // ... 

    return YES; 
} 

- (NSArray *)touchedSpritesAtLocation:(CGPoint)location 
{ 
    NSMutableArray *touchedSprites = [[NSMutableArray alloc] init]; 

    for (CCSprite *target in _targets) 
     if (CGRectContainsPoint(target.boundingBox, location)) 
      [touchedSprites addObject:target]; 

    return [touchedSprites autorelease]; 
} 

它應該返回已觸及目標。