原理

监听屏幕的点击事件

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event;

- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event;

- (void)touchesCancelled:(nullable NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event;

动画

pop动画，需要pop框架

两个动画一个放大，一个还原

kPOPViewScaleXY：放大宽高

代码

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {    POPSpringAnimation *scaleAnimation = [POPSpringAnimation animation];    scaleAnimation.property = [POPAnimatableProperty propertyWithName:kPOPViewScaleXY];//宽高改变    scaleAnimation.toValue = [NSValue valueWithCGSize:CGSizeMake(1.3, 1.3)];//1.3倍    [self pop_addAnimation:scaleAnimation forKey:@"scaleAnimationKey"];//执行动画    scaleAnimation.completionBlock = ^(POPAnimation *animation,BOOL finish) { //动画回调        POPSpringAnimation *scaleAnimation = [POPSpringAnimation animation];        scaleAnimation.springBounciness = 16;    // value between 0-20        scaleAnimation.springSpeed = 14;     // value between 0-20        scaleAnimation.property = [POPAnimatableProperty propertyWithName:kPOPViewScaleXY];        scaleAnimation.toValue = [NSValue valueWithCGSize:CGSizeMake(1.0, 1.0)];        [self pop_addAnimation:scaleAnimation forKey:@"scaleAnimationKey"];    };}

效果图