碰撞检测仅发生在屏幕顶部答案

【问题标题】：collision detection only happen top of the screen碰撞检测仅发生在屏幕顶部
【发布时间】：2013-03-25 07:25:31
【问题描述】：

我将制作一个非常简单的游戏，例如从顶部掉下的精灵，我必须用另一个精灵抓住它，如果我不这样做，精灵会离开屏幕并移除，那部分没问题，我还添加了碰撞检测，主要问题是这种碰撞只发生在屏幕的上部而不是屏幕的底部，为什么会发生这种情况请帮忙，（我是新人：S），这是完整代码

在我的 .h`然后 .m

{
CCSprite *right;
CCSprite *left;


NSMutableArray *_left;    
}




-(void)ringcreate:(ccTime)dt
{

CGSize winsize = [[CCDirector sharedDirector] winSize];

int minX = left.contentSize.width / 2;
int maxX = winsize.width - left.contentSize.width/2;
int rangeX = maxX - minX;
int actualX = (arc4random() % rangeX) + minX;



left = [CCSprite spriteWithFile:@"2.png"];
left.position = ccp(actualX,winsize.height);
[self addChild:left];




id move3 = [CCMoveTo actionWithDuration:5 position:ccp(winsize.width/2,0)];


[left runAction:move3];

}




-(id) init
{
// always call "super" init
// Apple recommends to re-assign "self" with the "super's" return value
if( (self=[super init]) ) {

    self.touchEnabled = YES;

    right = [CCSprite spriteWithFile:@"1.png"];
    right.position = ccp(0,0);
    [self addChild:right]; 


    [self schedule:@selector(ringcreate:)  interval:2];
    [self schedule:@selector(update:)];

}
return self;
  }


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




 id move = [CCMoveTo actionWithDuration:1 position:ccp(location.x,location.y)];

 [right runAction:move];



 }



 -(void) update:(ccTime)dt
 {
   if (CGRectIntersectsRect(right.boundingBox, left.boundingBox)) {

    CCLOG(@"collison hoyse");



    id move1 = [CCScaleTo actionWithDuration:0.4 scale:0.3];
    left.visible = NO;
    [left runAction:move1];



    }
  }

【问题讨论】：

标签： ios objective-c cocos2d-iphone collision-detection removechild

【解决方案1】：

我解决了这个问题，我只需要添加数组并使用该方法更新它们，

-(void) update:(ccTime)dt
{
NSMutableArray *crabToUpdate = [[NSMutableArray alloc] init];
for (CCSprite *crab in crabarray) {

    NSMutableArray *ring_to_delete = [[NSMutableArray alloc] init];
    for (ring1 in ringarray) {

            if (CGRectIntersectsRect(crab.boundingBox, ring1.boundingBox)) {                  
                [ring_to_delete addObject:ring1];                    
            }       
    }  

        for (CCSprite *ring1 in ring_to_delete) { 
            [ringarray removeObject:ring1];
            [self removeChild:ring1 cleanup:YES];
        }
    if (ring_to_delete.count >0) {
        [crabToUpdate addObject:crab];
    }

        [ring_to_delete release];


 }
}

【讨论】：

非常感谢。你让我开心。