Iphone CCLayer周围的边界

我正在使用Cocos2d拖动精灵，并尝试在选中精灵时添加边框。我可以显示我的白色背景，但我的边界被证明是特别困难的。我有以下代码：

if(self.selectedSprite)
    self.selectedSprite = nil;

CCLayerColor *selectedLayer = [[CCLayerColor alloc] init];
//    CCSprite *backgroundSprite = [CCSprite spriteWithFile:@"white_1x1.gif" rect:CGRectMake(2,2,self.boundingBox.size.width-4,self.boundingBox.size.height-4)];
CCSprite *backgroundSprite = [CCSprite spriteWithFile:@"white_1x1.gif" rect:CGRectMake(0,0,self.boundingBox.size.width,self.boundingBox.size.height)];
[backgroundSprite setContentSize:CGSizeMake(self.contentSize.width-4, self.contentSize.height-4)];
backgroundSprite.anchorPoint = ccp(0,0);

CCRenderTexture* rt = [CCRenderTexture renderTextureWithWidth:backgroundSprite.texture.contentSize.width + 2  height:backgroundSprite.texture.contentSize.height+2];

[backgroundSprite setFlipY:YES];
[backgroundSprite setColor:ccc3(0,0,0)];
ccBlendFunc originalBlendFunc = [backgroundSprite blendFunc];
[backgroundSprite setBlendFunc:(ccBlendFunc) { GL_SRC_ALPHA, GL_ONE }];

CGPoint bottomLeft = ccp(backgroundSprite.texture.contentSize.width * backgroundSprite.anchorPoint.x + 1, backgroundSprite.texture.contentSize.height * backgroundSprite.anchorPoint.y + 1);
CGPoint position = ccpSub([backgroundSprite position], ccp(-backgroundSprite.contentSize.width / 2.0f, -backgroundSprite.contentSize.height / 2.0f));

[rt begin];

for (int i=0; i<360; i++) // you should optimize that for your needs
{
    [backgroundSprite setPosition:ccp(bottomLeft.x + sin(CC_DEGREES_TO_RADIANS(i))*1, bottomLeft.y + cos(CC_DEGREES_TO_RADIANS(i))*1)];
    [backgroundSprite visit];
}

[backgroundSprite setPosition:bottomLeft];
[backgroundSprite setBlendFunc:originalBlendFunc];
[backgroundSprite setColor:ccc3(255,255,255)];
[backgroundSprite visit];

[rt end];

[rt setPosition:position];

[selectedLayer addChild:rt];
[selectedLayer addChild:backgroundSprite];
self.selectedSprite = selectedLayer;

if（self.selectedSprite）
self.selectedSprite=nil；
CCLayerColor*selectedLayer=[[CCLayerColor alloc]init]；
//CCSprite*backgroundSprite=[CCSprite spriteWithFile:@“white_1x1.gif”rect:CGRectMake（2,2，self.boundingBox.size.width-4，self.boundingBox.size.height-4）]；
CCSprite*backgroundSprite=[CCSprite spriteWithFile:@“white_1x1.gif”rect:CGRectMake（0,0，self.boundingBox.size.width，self.boundingBox.size.height）]；
[backgroundSprite setContentSize:CGSizeMake（self.contentSize.width-4，self.contentSize.height-4）]；
backgroundSprite.anchorPoint=ccp（0,0）；
CCRenderTexture*rt=[CCRenderTexture renderTextureWithWidth:backgroundSprite.texture.contentSize.width+2高度：backgroundSprite.texture.contentSize.height+2]；
[背景雪碧·塞特弗利比：是]；
[背景色：ccc3（0,0,0）]；
ccBlendFunc originalBlendFunc=[backgroundSprite blendFunc]；
[backgroundSprite setBlendFunc:（ccBlendFunc）{GL_SRC_ALPHA，GL_ONE}]；
CGPoint bottomLeft=ccp（backgroundSprite.texture.contentSize.width*backgroundSprite.anchorPoint.x+1，backgroundSprite.texture.contentSize.height*backgroundSprite.anchorPoint.y+1）；
CGPoint position=ccpSub（[backgroundSprite position]，ccp（-backgroundSprite.contentSize.width/2.0f，--backgroundSprite.contentSize.height/2.0f））；
[rt开始]；
对于（int i=0；i您可以创建自己的类，该类将包含您的精灵，并在需要时在其上绘制边框。若要绘制边框，请覆盖类的
draw（）
方法

-(void) draw
{
    if( m_needDrawRect == YES )
    {
        CGSize selfSize = [self contentSize];
        float selfHeight = selfSize.height;
        float selfWidth = selfSize.width;
        CGPoint vertices[4] = {ccp(0.f, 0.f), ccp(0.f, selfHeight), ccp(selfWidth, selfHeight), ccp(selfWidth, 0.f)};
        ccDrawPoly(vertices, 4, YES);
    }

}

此方法中绘制的所有内容都将使用zOrder 0绘制，因此，若要查看边框，请使用zOrder-1添加精灵。
您可以创建自己的类，该类将包含精灵并在其上绘制边框（如果需要）。若要绘制边框，请覆盖类的
draw（）
方法

-(void) draw
{
    if( m_needDrawRect == YES )
    {
        CGSize selfSize = [self contentSize];
        float selfHeight = selfSize.height;
        float selfWidth = selfSize.width;
        CGPoint vertices[4] = {ccp(0.f, 0.f), ccp(0.f, selfHeight), ccp(selfWidth, selfHeight), ccp(selfWidth, 0.f)};
        ccDrawPoly(vertices, 4, YES);
    }

}

此方法中的所有绘制都将使用zOrder 0绘制，因此，要查看边框，请使用zOrder-1添加精灵。
非常好，这正是我需要的。m_needDrawRect是用来控制笔划是否可见的。非常好，这正是我需要的。m_needDrawRect是用来控制笔划是否可见的e笔划可见。