遇到过这种需求要做成类似与苹果删除软件时的动态效果。
1.长按抖动;
2.抖动时出现一个x;
3.点击x，删除button;
4.抖动时，点击按钮，停止抖动;
下面是我的设计思路：
1.继承uibutton；
2.给button在右上角添加一个按钮；
3.给button添加长按手势；
4.给button添加遮盖，抖动时可以拦截点击事件；
有更好的做法，还请斧正。
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// .m文件
#import "dzdeletebutton.h"
#import "uiview+extension.h" // 这个只是为了方便取宽高的一个分类，代码就不贴了
@interface dzdeletebutton ()
// 是否抖动
@property (nonatomic, assign, getter=isshaking) bool shaking;
// 右上角的按钮，
@property (nonatomic, weak) uiimageview *iconbtn;
// 遮盖，在抖动时出现
@property (nonatomic, weak) uiview *coverview;
@end
@implementation dzdeletebutton
- (uiimageview *)iconbtn {
if (!_iconbtn) {
uiimageview *iconbtn = [[uiimageview alloc] initwithimage:[uiimage imagenamed:@"delete"]];
iconbtn.userinteractionenabled = yes;
iconbtn.hidden = yes;
_iconbtn = iconbtn;
uitapgesturerecognizer *tap = [[uitapgesturerecognizer alloc] initwithtarget:self action:@selector(iconclick)];
[iconbtn addgesturerecognizer:tap];
[self addsubview:iconbtn];
}
return _iconbtn;
}
- (uiview *)coverview {
if (!_coverview) {
uiview *view = [[uiview alloc] init];
view.backgroundcolor = [uicolor clearcolor];
view.hidden = yes;
uitapgesturerecognizer *tap = [[uitapgesturerecognizer alloc] initwithtarget:self action:@selector(coverclick)];
[view addgesturerecognizer:tap];
[self addsubview:view];
_coverview = view;
}
return _coverview;
}
- (instancetype)initwithframe:(cgrect)frame
{
self = [super initwithframe:frame];
if (self) {
[self addlongpressgesturerecognizer];
}
return self;
}
- (instancetype)init
{
self = [super init];
if (self) {
[self addlongpressgesturerecognizer];
}
return self;
}
- (instancetype)initwithcoder:(nscoder *)coder
{
self = [super initwithcoder:coder];
if (self) {
[self addlongpressgesturerecognizer];
}
return self;
}
// 添加长按手势
- (void)addlongpressgesturerecognizer {
uilongpressgesturerecognizer *longpress = [[uilongpressgesturerecognizer alloc] initwithtarget:self action:@selector(longclick)];
[self addgesturerecognizer:longpress];
}
- (void)delete {
[self.iconbtn.superview removefromsuperview];
}
// 是否执行动画
- (void)setshaking:(bool)shaking {
if (shaking) {
[self shakinganimation];
self.coverview.hidden = no;
self.iconbtn.hidden = no;
} else {
[self.layer removeallanimations];
self.coverview.hidden = yes;
self.iconbtn.hidden = yes;
}
}
#pragma mark - 抖动动画
#define angle2radian(angle) ((angle) / 180.0 * m_pi)
- (void)shakinganimation {
cakeyframeanimation *anim = [cakeyframeanimation animation];
anim.keypath = @"transform.rotation";
anim.values = @[@(angle2radian(-5)), @(angle2radian(5)), @(angle2radian(-5))];
anim.duration = 0.25;
// 动画次数设置为最大
anim.repeatcount = maxfloat;
// 保持动画执行完毕后的状态
anim.removedoncompletion = no;
anim.fillmode = kcafillmodeforwards;
[self.layer addanimation:anim forkey:@"shake"];
}
- (void)longclick {
if (self.shaking) return;
self.shaking = yes;
}
// 点击右上角按钮
- (void)iconclick {
[self removefromsuperview];
// 设计一个代理，为了在自己被删除后做一些事情(例如，对页面进行布局)
if ([self.delegate respondstoselector:@selector(deletebuttonremoveself:)]) {
[self.delegate deletebuttonremoveself:self];
}
}
- (void)coverclick {
self.shaking = no;
}
- (void)layoutsubviews {
[super layoutsubviews];
// 调整位置
self.imageview.x = 0;
self.imageview.y = 0;
self.imageview.width = self.width;
self.imageview.height = self.width;
self.titlelabel.x = 0;
self.titlelabel.width = self.width;
if (self.width >= self.height) {
self.titlelabel.height = 20;
self.titlelabel.y = self.height - self.titlelabel.height;
} else {
self.titlelabel.y = self.imageview.height;
self.titlelabel.height = self.height - self.titlelabel.y;
}
self.titlelabel.textalignment = nstextalignmentcenter;
self.iconbtn.size = cgsizemake(self.width * 0.3, self.width * 0.3);
self.iconbtn.x = self.width - self.iconbtn.width;
self.iconbtn.y = 0;
self.coverview.frame = self.bounds;
[self bringsubviewtofront:self.iconbtn];
}
@end
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// .h文件 只有一个代理
#import <uikit/uikit.h>
@class dzdeletebutton;
@protocol dzdeletebuttondelegate <nsobject>
@optional
- (void)deletebuttonremoveself:(dzdeletebutton *)button;
@end
@interface dzdeletebutton : uibutton
@property (nonatomic, weak) id<dzdeletebuttondelegate> delegate;
@end
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上面效果图在vc中的代码
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- (void)viewdidload {
[super viewdidload];
dzdeletebutton *button = [[dzdeletebutton alloc] init];
[button setimage:[uiimage imagenamed:@"bj"] forstate:uicontrolstatenormal];
[button settitle:@"百思" forstate:uicontrolstatenormal];
button.delegate = self;
button.frame = cgrectmake(20, 20, 60, 80);
[button settitlecolor:[uicolor redcolor] forstate:uicontrolstatenormal];
[button addtarget:self action:@selector(btnclick) forcontrolevents:uicontroleventtouchupinside];
[self.view addsubview:button];
}
- (void)btnclick {
nslog(@"点击button");
}
- (void)deletebuttonremoveself:(dzdeletebutton *)button {
nslog(@"已经删除，要做什么事");
}
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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。