iOS 通过collectionView实现照片删除功能

2025-05-29 0 81

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

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#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

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//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

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#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

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#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快网idc网站的支持!

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

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