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
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uitapgesturerecognizer *tap = [[uitapgesturerecognizer alloc] initwithtarget:self action:@selector(ontap:)];
[self.view addgesturerecognizer:tap];
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- (void)ontap:(uitapgesturerecognizer*)sender {
cgpoint center = [sender locationinview:sender.view];
[fingerwaveview showinview:self.view center:center];
}
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fingerwaveview.h
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#import <uikit/uikit.h>
@interface fingerwaveview : uiview
+ (instancetype)showinview:(uiview *)view center:(cgpoint)center;
@end
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fingerwaveview.m
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#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
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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。