如何删除一个精灵，当它达到某个点或它被触摸？

Question

我想在cocos2d中制作游戏，其中我从屏幕顶部滴下精灵。现在，一旦这个精灵被挖掘出来，它就会回升。这对我来说工作得很好，但是，有些情况下，精灵在离开屏幕后会回落。此外，我的精灵一旦到达屏幕上的某个y轴位置，它们就不会消失。这里是我的代码部分

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

CGRect rect = CGRectMake(sprite.position.x - (sprite.contentSize.width/2), sprite.position.y - (sprite.contentSize.height/2), sprite.contentSize.width, sprite.contentSize.height); 

if(CGRectContainsPoint(rect, loc)) 
{ 
    [sprite runAction:[CCCallFuncN actionWithTarget:self selector:@selector(spriteCaught)]]; 
}} 

-(void)spriteCaught 
{ 
//currentPos is an integer to get the current position of the sprite 
id moveUp = [CCMoveTo actionWithDuration:1 position:ccp(currentPos, 500)]; 
[sprite runAction:[CCSequence actions:moveUp, nil]]; 
if(sprite.position.y >= 480) 
{ 
    [self removeChild:sprite cleanup:YES]; 
}} 

而且，我不知道如果我的语法是正确的，但我的条件语句（即检查在精灵的y轴位置的一个）也不起作用。我该如何解决这个问题？任何帮助和建议不胜感激

Answer 1

而不是手动rect，使用精灵的边界框。

  if(CGRectContainsPoint([sprite boundingBox], loc)) 

还更新spriteCaught函数。

-(void)spriteCaught 
{ 
    CGSize s = [[CCDirector sharedDirector] winSize]; 

    float dest_y = s.height+sprite.contentSize.height*0.5f; //assumed ur sprite's anchor y = 0.5 

    //currentPos is an integer to get the current position of the sprite 
    id moveUp = [CCMoveTo actionWithDuration:1 position:ccp(sprite.position, dest_y)]; 
    id calBlokc = [CCCallBlockN actionWithBlock:^(CCNode *node) 
    { 
     //here node = sprite tht runs this action 
     [node removeFromParentAndCleanup:YES]; 
    }]; 
    id sequence = [CCSequence actions:moveUp, calBlokc, nil]; 

    [sprite runAction:sequence]; 
}