对齐并定位CCLabelTTF

Question

我期望以下代码将标签放置在屏幕的右上角。然而，x位置显示在屏幕的右侧，我必须手动移动它。这段代码有什么问题？

CGSize winSize = [[CCDirector sharedDirector] winSize]; 

self.screenTop = winSize.height; 
self.screenRight = winSize.width; 
self.screenBottom = 0; 
self.screenLeft = 0; 


self.scoreLabel = [CCLabelTTF labelWithString:@"000000" dimensions:CGSizeMake(200,30) hAlignment:kCCTextAlignmentRight fontName:@"Helvetica" fontSize:24]; 
self.scoreLabel.position = ccp(self.screenRight - 20, self.screenTop - 20); 
[self addChild:self.scoreLabel z:1]; 

该位置记录正确为{548，300}（iPhone5）。看起来hAlignment:kCCTextAlignmentRight不能正常工作。

Answer 1

self.scoreLabel.position = ccp(self.screenRight - 100, self.screenTop - 20); 

更一般：

self.scoreLabel.position = ccp(self.screenRight - self.scoreLabel.contenSize.width/2, 
self.screenTop - self.scoreLabel.contenSize.height/2);