ios照片图库怎么删除（ios照片全部删除）

一，效果图。

二，工程图。

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服务器之家网站的支持！

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