如何刪除一個精靈，當它達到某個點或它被觸摸？

Question

我想在cocos2d中製作遊戲，其中我從屏幕頂部滴下精靈。現在，一旦這個精靈被挖掘出來，它就會回升。這對我來說工作得很好，但是，有些情況下，精靈在離開屏幕後會回落。此外，我的精靈一旦到達屏幕上的某個y軸位置，它們就不會消失。這裏是我的代碼部分

-(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，我不知道如果我的語法是正確的，但我的條件語句（即檢查在精靈的y軸位置的一個）也不起作用。我該如何解決這個問題？任何幫助和建議不勝感激

Answer 1

而不是手動rect，使用精靈的邊界框。

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

還更新spriteCaught函數。

-(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]; 
}