cocos2d-iphone - Cocos2D CCButton setBackgroundColor 不工作

Question

我在 Cocos2D 默认模板的 IntroScene 中添加了以下代码:

CCButton *playButton = [CCButton buttonWithTitle:@"Play" fontName:@"HelveticaNeue" fontSize:18.0f];
[playButton setBackgroundColor:[CCColor colorWithWhite:0.7f alpha:1.0f] forState:CCControlStateNormal];
[playButton setBackgroundColor:[CCColor colorWithWhite:0.75f alpha:1.0f] forState:CCControlStateHighlighted];
playButton.positionType = CCPositionTypeNormalized;
playButton.position = ccp(0.5f, 0.35f);
playButton.zoomWhenHighlighted = NO;
playButton.preferredSize = CGSizeMake(222, 46);
[playButton setTarget:self selector:@selector(onSpinningClicked:)];
[self addChild:playButton];

由于某种原因，按钮没有背景颜色。有什么想法吗？

Answer 1

因为你没有设置颜色，只设置了亮度(这就是“白色”在 CCColor 上下文中的意思)。

尝试在这个初始化器中使用一种颜色:

CCColor* normalColor = [CCColor colorWithRed:1.0 green:0.0 blue:0.0 alpha:1.0f]
[playButton setBackgroundColor:normalColor forState:CCControlStateNormal];

这将使按钮背景变为红色。