iOS开发笔记-45:呼吸灯效果

头文件#import <QuartzCore/QuartzCore.h>

+(CABasicAnimation *) AlphaLight:(float)time
{
    CABasicAnimation *animation =[CABasicAnimation animationWithKeyPath:@"opacity"];
    animation.fromValue = [NSNumber numberWithFloat:1.0f];
    animation.toValue = [NSNumber numberWithFloat:0.0f];//这是透明度。
    animation.autoreverses = YES;
    animation.duration = time;//动画循环的时间，也就是呼吸灯效果的速度
    animation.repeatCount = MAXFLOAT;
    animation.removedOnCompletion = NO;
    animation.fillMode = kCAFillModeForwards;
    animation.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
    
    return animation;
}
//给指定元件添加动效:[yourUIView.layer addAnimation:[self AlphaLight:0.5] forKey:@"aAlpha"];
//移除动画:[_myView.layer removeAnimationForKey:@"aAlpha"];

原文地址：[http://v2it.win/ios/ios%E4%BC%9A%E5%91%BC%E5%90%B8%E7%9A%84%E5%8A%A8%E7%94%BB/](http://v2it.win/ios/ios%E4%BC%9A%E5%91%BC%E5%90%B8%E7%9A%84%E5%8A%A8%E7%94%BB/)

相关推荐（动画效果）：http://blog.jobbole.com/69111/