个人中心
gpt4 book ai didi

iOS 通过collectionView实现照片删除功能

转载 作者：qq735679552 更新时间：2022-09-27 22:32:09 28 4
gpt4 key购买 nike

CFSDN坚持开源创造价值，我们致力于搭建一个资源共享平台，让每一个IT人在这里找到属于你的精彩世界.

这篇CFSDN的博客文章iOS 通过collectionView实现照片删除功能由作者收集整理，如果你对这篇文章有兴趣，记得点赞哟.

一，效果图.

iOS 通过collectionView实现照片删除功能

二，工程图.

iOS 通过collectionView实现照片删除功能

三，代码.

viewcontroller.h 。

?
1
2
3
4
5
6
7
8
9
10
11
12
#import <uikit/uikit.h>
@interface viewcontroller : uiviewcontroller
<uicollectionviewdatasource,uicollectionviewdelegate,uicollectionviewdelegateflowlayout,uialertviewdelegate,uiactionsheetdelegate,uiimagepickercontrollerdelegate,uinavigationcontrollerdelegate>
{
  uicollectionview *_collectionview;
  uiimagepickercontroller *_imagepicker;
  nsmutablearray *photos;
  nsmutablearray *dataarray;
  nsinteger deleteindex;
  bool wobble;
}
@end

viewcontroller.m 。

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
//点击添加按钮的时候，停止删除。
#import "viewcontroller.h"
#import "photocollectionviewcell.h"
nsinteger const photo = 8;
@interface viewcontroller ()
@end
@implementation viewcontroller
- ( void )viewdidload {
  [super viewdidload];
  // do any additional setup after loading the view, typically from a nib.
  //其布局很有意思，当你的cell设置大小后，一行多少个cell，由cell的宽度决定
  uicollectionviewflowlayout *flowlayout = [[uicollectionviewflowlayout alloc]init];
  //设置cell的尺寸
  [flowlayout setitemsize:cgsizemake(70, 70)];
  //设置其布局方向
  [flowlayout setscrolldirection:uicollectionviewscrolldirectionvertical];
  //设置其边界(上，左，下，右）
  flowlayout.sectioninset = uiedgeinsetsmake(5,5,5,5);
  _collectionview = [[uicollectionview alloc]initwithframe:cgrectmake(10, 50, 320,85*2) collectionviewlayout:flowlayout];
  _collectionview.datasource = self;
  _collectionview.delegate = self;
  _collectionview.backgroundcolor = [uicolor redcolor];
  [_collectionview registerclass:[photocollectionviewcell class ] forcellwithreuseidentifier:@ "photo" ];
  [self.view addsubview:_collectionview];
  photos = [[nsmutablearray alloc ] init];
  dataarray = [[nsmutablearray alloc ] init];
  [dataarray addobject:[uiimage imagenamed:@ "contract_addpic1" ]];
}
//section
- (nsinteger)numberofsectionsincollectionview:(uicollectionview *)collectionview
{
  return 1;
}
//item个数
- (nsinteger)collectionview:(uicollectionview *)collectionview numberofitemsinsection:(nsinteger)section
{
  return dataarray.count;
}
-(uicollectionviewcell *)collectionview:(uicollectionview *)collectionview cellforitematindexpath:(nsindexpath *)indexpath
{
  nslog(@ "--indexpath.row--%ld" ,indexpath.row);
  nslog(@ "---indexpath.section--%ld" ,indexpath.section);
  photocollectionviewcell *cell = (photocollectionviewcell *)[collectionview dequeuereusablecellwithreuseidentifier:@ "photo" forindexpath:indexpath];
  cell.tag=indexpath.row;
  //图片
  cell.photoimage.image=dataarray[indexpath.row];
  // 删除按钮
  cell.deletebtn.tag =indexpath.row;
  cell.deletebtn.hidden=yes;
  [cell.deletebtn addtarget:self action:@selector(doclickdeletebutton:) forcontrolevents:uicontroleventtouchupinside];
  //增加按钮
  if (indexpath.row == dataarray.count -1) {
   cell.addbtn.hidden = no;
  } else
  {
   cell.addbtn.hidden = yes;
  }
  [cell.addbtn addtarget:self action:@selector(doclickaddbutton:) forcontrolevents:uicontroleventtouchupinside];
  // 长按删除
  uilongpressgesturerecognizer *longpress = [[uilongpressgesturerecognizer alloc ] initwithtarget:self action:@selector(longpressedaction)];
  [cell.contentview addgesturerecognizer:longpress];
  return cell;
}
#pragma -mark -doclickactions
//删除按钮
-( void )doclickdeletebutton:(uibutton *)btn
{
  nslog(@ "-----doclickdeletebutton-------" );
  uialertview *alert = [[uialertview alloc ] initwithtitle:@ "提示" message:@ "您确定要删除吗？" delegate:self cancelbuttontitle:@ "取消" otherbuttontitles:@ "确定" , nil];
  deleteindex = btn.tag;
  [alert show];
  nslog(@ "---delete--dataarray---%@" ,dataarray);
}
//增加按钮
-( void )doclickaddbutton:(uibutton *)btn
{
  nslog(@ "-----doclickaddbutton-------" );
  if (wobble) {
   // 如果是编辑状态则取消编辑状态
   [self cancelwobble];
  } else {
   //不是编辑状态，添加图片
   if (dataarray.count > photo) {
    uialertview *alert = [[uialertview alloc ] initwithtitle:@ "提示" message:@ "最多支持8个" delegate:self cancelbuttontitle:@ "取消" otherbuttontitles:@ "确定" , nil];
    [alert show];
   } else
   {
    uiactionsheet *actionsheet = [[uiactionsheet alloc]
            initwithtitle:nil
            delegate:(id)self
            cancelbuttontitle:@ "取消"
            destructivebuttontitle:nil
            otherbuttontitles:@ "拍照" , @ "我的相册" ,nil];
    actionsheet.actionsheetstyle = uiactionsheetstyleblackopaque;
    [actionsheet showinview:self.view];
   }
  }
  nslog(@ "---add--dataarray---%@" ,dataarray);
}
//长按删除
-( void )longpressedaction
{
  nslog(@ "-----longpressedaction-------" );
  wobble = yes;
  nsarray *array = [_collectionview subviews];
  for ( int i = 0; i < array.count; i ++) {
    if ([array[i] iskindofclass:[photocollectionviewcell class ]]) {
    photocollectionviewcell *cell = array[i];
    if (cell.addbtn.hidden) {
     cell.deletebtn.hidden = no;
    }
    else
    {
     cell.deletebtn.hidden = yes;
     cell.photoimage.image = [uiimage imagenamed:@ "ensure" ];
     cell.tag = 999999;
    }
    // 晃动动画
    [self animationviewcell:cell];
   }
  }
}
// 取消晃动
-( void )cancelwobble
{
  wobble = no;
  nsarray *array = [_collectionview subviews];
  for ( int i = 0; i < array.count; i ++) {
   if ([array[i] iskindofclass:[photocollectionviewcell class ]]) {
    photocollectionviewcell *cell = array[i];
    cell.deletebtn.hidden = yes;
    if (cell.tag == 999999) {
     cell.photoimage.image = [uiimage imagenamed:@ "plus" ];
    }
    // 晃动动画
    [self animationviewcell:cell];
   }
  }
}
// 晃动动画
-( void )animationviewcell:(photocollectionviewcell *)cell
{
  //摇摆
  if (wobble){
   cell.transform = cgaffinetransformmakerotation(-0.1);
   [uiview animatewithduration:0.08
         delay:0.0
        options:uiviewanimationoptionrepeat|uiviewanimationoptionautoreverse|uiviewanimationoptionallowuserinteraction|uiviewanimationoptioncurvelinear
        animations:^{
         cell.transform = cgaffinetransformmakerotation(0.1);
        } completion:nil];
  }
  else {
   [uiview animatewithduration:0.25
         delay:0.0
        options:uiviewanimationoptionallowuserinteraction|uiviewanimationoptionbeginfromcurrentstate|uiviewanimationoptioncurveeaseout
        animations:^{
         cell.transform = cgaffinetransformidentity;
        } completion:nil];
  }
}
#pragma -mark -uiactionsheetdelegate
- ( void )actionsheet:(uiactionsheet *)actionsheet clickedbuttonatindex:(nsinteger)buttonindex
{
  if (buttonindex == 0) {
   [self opencamera];
  } else if (buttonindex == 1) {
   [self openpics];
  }
}
#pragma -mark -uialertviewdelegate
- ( void )alertview:(uialertview *)alertview clickedbuttonatindex:(nsinteger)buttonindex
{
  if (buttonindex == 1) {
   [dataarray removeobjectatindex:deleteindex];
   nsindexpath *path = [nsindexpath indexpathforrow:deleteindex insection:0];
   [_collectionview deleteitemsatindexpaths:@[path]];
   // 如果删除完，则取消编辑
   if (dataarray.count == 1) {
    [self cancelwobble];
   }
   // 没有删除完，执行晃动动画
   else
   {
    [self longpressedaction];
   }
  }
}
#pragma -mark -camera
// 打开相机
- ( void )opencamera {
  if ([uiimagepickercontroller issourcetypeavailable:uiimagepickercontrollersourcetypecamera])
  {
   if (_imagepicker == nil) {
    _imagepicker = [[uiimagepickercontroller alloc] init];
   }
   _imagepicker.delegate = (id)self;
   _imagepicker.sourcetype = uiimagepickercontrollersourcetypecamera;
   _imagepicker.showscameracontrols = yes;
   _imagepicker.allowsediting = yes;
   [self.navigationcontroller presentviewcontroller:_imagepicker animated:yes completion:nil];
  }
}
// 打开相册
- ( void )openpics {
  if (_imagepicker == nil) {
   _imagepicker = [[uiimagepickercontroller alloc] init];
  }
  _imagepicker.sourcetype = uiimagepickercontrollersourcetypephotolibrary;
  _imagepicker.allowsediting = yes;
  _imagepicker.delegate = (id)self;
  [self presentviewcontroller:_imagepicker animated:yes completion:null];
}
// 选中照片
- ( void )imagepickercontroller:(uiimagepickercontroller *)picker didfinishpickingmediawithinfo:(nsdictionary *)info{
  nsstring *mediatype = [info objectforkey:uiimagepickercontrollermediatype];
  [_imagepicker dismissviewcontrolleranimated:yes completion:null];
  _imagepicker = nil;
  // 判断获取类型：图片
  if ([mediatype isequaltostring:@ "public.image" ]){
   uiimage *theimage = nil;
   // 判断，图片是否允许修改
   if ([picker allowsediting]){
    //获取用户编辑之后的图像
    theimage = [info objectforkey:uiimagepickercontrollereditedimage];
   } else {
    // 照片的元数据参数
    theimage = [info objectforkey:uiimagepickercontrolleroriginalimage] ;
   }
   [dataarray insertobject:theimage atindex:0];
   nsindexpath *path = [nsindexpath indexpathforrow:0 insection:0];
   [_collectionview insertitemsatindexpaths:@[path]];
  }
}
- ( void )imagepickercontrollerdidcancel:(uiimagepickercontroller *)picker {
  [picker dismissviewcontrolleranimated:yes completion:null];
}
// 判断设备是否有摄像头
- ( bool ) iscameraavailable{
  return [uiimagepickercontroller issourcetypeavailable:uiimagepickercontrollersourcetypecamera];
}
#pragma mark - 相册文件选取相关
// 相册是否可用
- ( bool ) isphotolibraryavailable{
  return [uiimagepickercontroller issourcetypeavailable: uiimagepickercontrollersourcetypephotolibrary];
}
- ( void )didreceivememorywarning {
  [super didreceivememorywarning];
  // dispose of any resources that can be recreated.
}
@end

photocollectionviewcell.h 。

?
1
2
3
4
5
6
#import <uikit/uikit.h>
@interface photocollectionviewcell : uicollectionviewcell
@property (weak, nonatomic) iboutlet uibutton *addbtn;
@property (weak, nonatomic) iboutlet uiimageview *photoimage;
@property (weak, nonatomic) iboutlet uibutton *deletebtn;
@end

photocollectionviewcell.m 。

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
#import "photocollectionviewcell.h"
@implementation photocollectionviewcell
- (id)initwithframe:(cgrect)frame
{
  self = [super initwithframe:frame];
  if (self)
  {
   // 初始化时加载collectioncell.xib文件
   nsarray *arrayofviews = [[nsbundle mainbundle] loadnibnamed:@ "photocollectionviewcell" owner:self options:nil];
   // 如果路径不存在，return nil
   if (arrayofviews.count < 1)
   {
    return nil;
   }
   // 如果xib中view不属于uicollectionviewcell类，return nil
   if (![[arrayofviews objectatindex:0] iskindofclass:[uicollectionviewcell class ]])
   {
    return nil;
   }
   // 加载nib
   self = [arrayofviews objectatindex:0];
  }
  return self;
}
- ( void )awakefromnib {
  // initialization code
}
@end

总结 。

以上所述是小编给大家介绍的ios 通过collectionview实现照片删除功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对我网站的支持！ 。

原文链接：http://www.cnblogs.com/yang-guang-girl/archive/2017/11/23/7883117.html

最后此篇关于iOS 通过collectionView实现照片删除功能的文章就讲到这里了,如果你想了解更多关于iOS 通过collectionView实现照片删除功能的内容请搜索CFSDN的文章或继续浏览相关文章，希望大家以后支持我的博客！ 。

28 4 0
文章推荐： Java web spring异步方法实现步骤解析
文章推荐： IOS 指纹识别详解及实例代码
文章推荐： iOS开发网络篇—实现大文件的多线程断点下载
文章推荐： VBS中获取系统本次及上次开关机时间的代码(WinXP/win2003/Win7兼容版)
qq735679552
个人简介

我是一名优秀的程序员,十分优秀！

滴滴打车优惠券免费领取
滴滴打车优惠券
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com