iOS实现手指点击出现波纹的效果

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。