核心动画 - CAKeyframeAnimation 简单应用

 

核心动画： 登录按钮的抖动效果：

CAKeyframeAnimation * kfAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform.translation.x"];
        kfAnimation.values = @[@-10,@0,@10,@0];
        kfAnimation.repeatCount = 2;
        kfAnimation.duration = 0.2;
        [loginButton.layer addAnimation:kfAnimation forKey:nil];