一、代码如下
@property (weak, nonatomic) IBOutlet UIView *myView;
- (IBAction)show:(id)sender
{
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
[animation setFromValue:@(1.0f)];//1.缩放的开始值
[animation setToValue:@(0.1f)];//2.所要缩放到的值
[animation setAutoreverses:YES];//3.是否原路返回
[animation setDuration:1.0f];//4.动画时长
[animation setRepeatDuration:MAXFLOAT];//5.动画重复次数
[self.myView.layer addAnimation:animation forKey:nil];
}
二、动画效果
suofang.gif
