借鉴相关资料，整理了一个很有意思的button动画效果，ios自定义uibutton点击动画特效
先看一下效果图：
下面贴上代码：
viewcontroller：
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#import <uikit/uikit.h>
@interface viewcontroller : uiviewcontroller
@end
#import "viewcontroller.h"
#import "hwbutton.h"
#define mainw [uiscreen mainscreen].bounds.size.width
#define mainh [uiscreen mainscreen].bounds.size.height
@interface viewcontroller ()
@end
@implementation viewcontroller
- (void)viewdidload {
[super viewdidload];
self.view.backgroundcolor = [uicolor blackcolor];
//创建控件
[self creatbutton];
}
- (void)creatbutton
{
hwbutton *button = [[hwbutton alloc] initwithframe:cgrectmake(mainw * 0.5 - 60, mainh - 100, 120, 72) maxleft:100 maxright:100 maxheight:300];
[button setimage:[uiimage imagenamed:@"button"] forstate:uicontrolstatenormal];
button.images = @[[uiimage imagenamed:@"circle 1"], [uiimage imagenamed:@"circle 2"], [uiimage imagenamed:@"circle 3"], [uiimage imagenamed:@"hero"]];
button.duration = 10;
[button addtarget:self action:@selector(buttononclick:) forcontrolevents:uicontroleventtouchupinside];
[self.view addsubview:button];
}
- (void)buttononclick:(hwbutton *)btn
{
[btn generatebubbleinrandom];
}
@end
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hwbutton：
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#import <uikit/uikit.h>
@interface hwbutton : uibutton
@property (nonatomic, assign) cgfloat maxleft;
@property (nonatomic, assign) cgfloat maxright;
@property (nonatomic, assign) cgfloat maxheight;
@property (nonatomic, assign) cgfloat duration;
@property (nonatomic, strong) nsarray *images;
- (instancetype)initwithframe:(cgrect)frame maxleft:(cgfloat)maxleft maxright:(cgfloat)maxright maxheight:(cgfloat)maxheight;
- (void)generatebubblewithimage:(uiimage *)image;
- (void)generatebubbleinrandom;
@end
#import "hwbutton.h"
@implementation hwbutton
{
cgpoint _startpoint;
cgfloat _maxwidth;
nsmutableset *_recyclepool;
nsmutablearray *_array;
}
- (instancetype)initwithframe:(cgrect)frame maxleft:(cgfloat)maxleft maxright:(cgfloat)maxright maxheight:(cgfloat)maxheight
{
self = [super initwithframe:frame];
if (self) {
_maxheight = maxheight;
_maxleft = maxleft;
_maxright = maxright;
[self initdata];
}
return self;
}
- (id)initwithcoder:(nscoder *)adecoder
{
self = [super initwithcoder:adecoder];
if (self) {
[self initdata];
}
return self;
}
- (void)initdata
{
_array = @[].mutablecopy;
_recyclepool = [nsmutableset set];
}
- (void)generatebubbleinrandom
{
calayer *layer;
if (_recyclepool.count > 0) {
layer = [_recyclepool anyobject];
[_recyclepool removeobject:layer];
}else {
uiimage *image = self.images[arc4random() % self.images.count];
layer = [self createlayerwithimage:image];
}
[self.layer addsublayer:layer];
[self generatebubblewithcalayer:layer];
}
- (void)generatebubblewithimage:(uiimage *)image
{
calayer *layer = [self createlayerwithimage:image];
[self.layer addsublayer:layer];
[self generatebubblewithcalayer:layer];
}
- (void)generatebubblewithcalayer:(calayer *)layer
{
_maxwidth = _maxleft + _maxright + self.bounds.size.width;
_startpoint = cgpointmake(self.frame.size.width / 2, 0);
cgpoint endpoint = cgpointmake(_maxwidth * [self randomfloat] - _maxleft, -_maxheight);
cgpoint controlpoint1 = cgpointmake(_maxwidth * [self randomfloat] - _maxleft, -_maxheight * 0.2);
cgpoint controlpoint2 = cgpointmake(_maxwidth * [self randomfloat] - _maxleft, -_maxheight * 0.6);
cgmutablepathref curvedpath = cgpathcreatemutable();
cgpathmovetopoint(curvedpath, null, _startpoint.x, _startpoint.y);
cgpathaddcurvetopoint(curvedpath, null, controlpoint1.x, controlpoint1.y, controlpoint2.x, controlpoint2.y, endpoint.x, endpoint.y);
cakeyframeanimation *keyframe = [cakeyframeanimation animation];
keyframe.keypath = @"position";
keyframe.path = cfautorelease(curvedpath);
keyframe.duration = self.duration;
keyframe.calculationmode = kcaanimationpaced;
[layer addanimation:keyframe forkey:@"keyframe"];
cabasicanimation *scale = [cabasicanimation animation];
scale.keypath = @"transform.scale";
scale.tovalue = @1;
scale.fromvalue = [nsvalue valuewithcatransform3d:catransform3dmakescale(0.1, 0.1, 0.1)];
scale.duration = 0.5;
cabasicanimation *alpha = [cabasicanimation animation];
alpha.keypath = @"opacity";
alpha.fromvalue = @1;
alpha.tovalue = @0.1;
alpha.duration = self.duration * 0.4;
alpha.begintime = self.duration - alpha.duration;
caanimationgroup *group = [caanimationgroup animation];
group.animations = @[keyframe, scale, alpha];
group.duration = self.duration;
group.delegate = self;
group.timingfunction = [camediatimingfunction functionwithname:kcamediatimingfunctioneaseout];
group.fillmode = kcafillmodeforwards;
group.removedoncompletion = no;
[layer addanimation:group forkey:@"group"];
[_array addobject:layer];
}
- (cgfloat)randomfloat
{
return (arc4random() % 100)/100.0f;
}
- (calayer *)createlayerwithimage:(uiimage *)image
{
cgfloat scale = [uiscreen mainscreen].scale;
calayer *layer = [calayer layer];
layer.frame = cgrectmake(0, 0, image.size.width / scale, image.size.height / scale);
layer.contents = (__bridge id)image.cgimage;;
return layer;
}
- (void)animationdidstop:(caanimation *)anim finished:(bool)flag
{
if (flag) {
calayer *layer = [_array firstobject];
[layer removeallanimations];
[layer removefromsuperlayer];
[_array removeobject:layer];
[_recyclepool addobject:layer];
}
}
@end
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/hero_wqb/article/details/50351663