最近在做一个小游戏，就希望把按钮能做的动态些，下面是一个简单的效果的button,
time1.gif
实现起来也非常简单，主要用到 CAKeyframeAnimation
主要代码段如下
-(void)setUI
{
CAKeyframeAnimation *scaleX = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale.x"];
scaleX.values = @[[NSNumber numberWithFloat:1.0],[NSNumber numberWithFloat:1.1],[NSNumber numberWithFloat:1.0]];
scaleX.keyTimes = @[[NSNumber numberWithFloat:0.0],[NSNumber numberWithFloat:0.5],[NSNumber numberWithFloat:1.0]];
scaleX.repeatCount = MAXFLOAT;
scaleX.autoreverses = YES;
scaleX.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
scaleX.duration = 6;
[self.layer addAnimation:scaleX forKey:@"scaleXAnimation"];
CAKeyframeAnimation *scaleY = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale.y"];
scaleY.values = @[[NSNumber numberWithFloat:1.0],[NSNumber numberWithFloat:1.1],[NSNumber numberWithFloat:1.0]];
scaleY.keyTimes = @[[NSNumber numberWithFloat:0.0],[NSNumber numberWithFloat:0.5],[NSNumber numberWithFloat:1.0]];
scaleY.repeatCount = MAXFLOAT;
scaleY.autoreverses = YES;
scaleY.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
scaleY.duration = 6;
[self.layer addAnimation:scaleX forKey:@"scaleYAnimation"];
}
我将他封装成一个CGBubbleBtn ,只要像正常使用button 那样使用即可，demo 地址如下
https://github.com/heysunnyboy/BubbleBtn
