iOS自定义button抖动效果并实现右上角删除按钮

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。

// .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

// .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

上面效果图在vc中的代码

- (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");
}

以上就是本文的全部内容，希望对大家的学习有所帮助。