ios - 将UIButton的背景色从白色变为红色

我正在尝试制作一种颜色脉冲效果，以动画化UIButton的背景颜色，以使其从一种颜色(WhiteColor)连续变为另一种(RedColor)。
我正在尝试使用CABasicAnimation更改不透明度，但我也无法使其与颜色配合使用。

    CABasicAnimation *theAnimation;

    theAnimation=[CABasicAnimation animationWithKeyPath:@"opacity"];
    theAnimation.duration=1.0;
    theAnimation.repeatCount=HUGE_VALF;
    theAnimation.autoreverses=YES;
    theAnimation.fromValue=[NSNumber numberWithFloat:1.0];
    theAnimation.toValue=[NSNumber numberWithFloat:0.0];
    [BigButton.layer addAnimation:theAnimation forKey:@"animateOpacity"];

每个建议将不胜感激。
谢谢

最佳答案

我找到了正确的方法。您需要记住CGColor。这是我的错编译器在这里没有帮助。

objective-c

CABasicAnimation *theAnimation=[CABasicAnimation animationWithKeyPath:@"backgroundColor"];
theAnimation.duration=1.0;
theAnimation.repeatCount=HUGE_VALF;
theAnimation.autoreverses=YES;
theAnimation.fromValue= [[UIColor redColor] CGColor];
theAnimation.toValue= [[UIColor blueColor] CGColor];
[BigButton.layer addAnimation:theAnimation forKey:@"ColorPulse"];

迅速

let colorAnimation = CABasicAnimation(keyPath: "backgroundColor")
colorAnimation.fromValue = UIColor.redColor().CGColor
colorAnimation.toValue = UIColor.blueColor().CGColor
colorAnimation.duration = 1
colorAnimation.autoreverses = true
colorAnimation.repeatCount = FLT_MAX
self.layer.addAnimation(colorAnimation, forKey: "ColorPulse")