实现来看看模拟器上效果：

具体的实现代码如下

首先监听控制器view的Tap事件

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onTap:)]; [self.view addGestureRecognizer:tap];

- (void)onTap:(UITapGestureRecognizer*)sender { CGPoint center = [sender locationInView:sender.view]; [FingerWaveView showInView:self.view center:center]; }

FingerWaveView.h

#import <UIKit/UIKit.h> @interface FingerWaveView : UIView + (instancetype)showInView:(UIView *)view center:(CGPoint)center; @end

FingerWaveView.m

#import "FingerWaveView.h" @interface FingerWaveView () <CAAnimationDelegate> { CGSize waveSize; NSTimeInterval duration; } @end @implementation FingerWaveView - (instancetype)initWithFrame:(CGRect)frame{ self=[super initWithFrame:frame]; if (self) { waveSize = CGSizeMake(150, 150); duration = 1.0; } return self; } + (instancetype)showInView:(UIView *)view center:(CGPoint)center { FingerWaveView *waveView = [FingerWaveView new]; [waveView setframeWithCenter:center]; [view addSubview:waveView]; return waveView; } - (void)didMoveToSuperview{ CAShapeLayer *waveLayer = [CAShapeLayer new]; waveLayer.backgroundColor = [UIColor clearColor].CGColor; waveLayer.opacity = 0.6; waveLayer.fillColor = [UIColor whiteColor].CGColor; [self.layer addSublayer:waveLayer]; [self startAnimationInLayer:waveLayer]; } - (void)startAnimationInLayer:(CALayer *)layer{ UIBezierPath *beginPath = [UIBezierPath bezierPathWithArcCenter:[self pathCenter] radius:[self animationBeginRadius] startAngle:0 endAngle:M_PI*2 clockwise:YES]; UIBezierPath *endPath = [UIBezierPath bezierPathWithArcCenter:[self pathCenter] radius:[self animationEndRadius] startAngle:0 endAngle:M_PI*2 clockwise:YES]; CABasicAnimation *rippleAnimation = [CABasicAnimation animationWithKeyPath:@"path"]; rippleAnimation.delegate = self; rippleAnimation.fromValue = (__bridge id _Nullable)(beginPath.CGPath); rippleAnimation.toValue = (__bridge id _Nullable)(endPath.CGPath); rippleAnimation.duration = duration; CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"]; opacityAnimation.delegate = self; opacityAnimation.fromValue = [NSNumber numberWithFloat:0.6]; opacityAnimation.toValue = [NSNumber numberWithFloat:0.0]; opacityAnimation.duration = duration; [layer addAnimation:rippleAnimation forKey:@"rippleAnimation"]; [layer addAnimation:opacityAnimation forKey:@"opacityAnimation"]; } - (void)setframeWithCenter:(CGPoint)center{ CGRect frame = CGRectMake(center.x-waveSize.width*0.5, center.y-waveSize.height*0.5, waveSize.width, waveSize.height); self.frame = frame;; } - (CGFloat)animationBeginRadius{ return waveSize.width*0.5*0.2; } - (CGFloat)animationEndRadius{ return waveSize.width*0.5; } - (CGPoint)pathCenter{ return CGPointMake(waveSize.width*0.5, waveSize.height*0.5); } #pragma mark - CAAnimationDelegate - (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{ if (flag) { [self removeFromSuperview]; } } @end

总结

大家也可以DIY我的代码，做出很多其他的效果，比如改成其他的波纹颜色。以上就是这篇文章的全部内容了，希望本文的内容ui各位iOS开发者们能有所帮助，如果有疑问大家可以留言交流。