iOS仿微信图片分享界面实现代码

分享功能目前几乎已成为很多app的标配了，其中微信，微博等app的图片分享界面设计的很棒，不仅能够展示缩略图，还可以预览删除。最近我在做一款社交分享app，其中就要实现图文分享功能，于是试着自行实现仿微信分享风格的功能。

核心思想：

主要是使用uicollectionview来动态加载分享图片内容，配合预览页面，实现动态添加和预览删除图片效果。

实现效果：

核心代码如下：

分享界面：

//
// 
 posttableviewcontroller.h
// 
 nineshare
//
// 
 created by 张昌伟 on 15/1/26.
// 
 copyright (c) 2015年 9studio. all rights reserved.
//
 
#import
 <uikit/uikit.h>
#import
 "umsocial.h"
#import
 "ysypreviewviewcontroller.h"
 
@interface posttableviewcontroller
 : uitableviewcontroller<uitextviewdelegate,uicollectionviewdatasource,uicollectionviewdelegate,uiactionsheetdelegate,uiimagepickercontrollerdelegate,umsocialuidelegate,uinavigationcontrollerdelegate>
 
@property (weak,
nonatomic)
iboutlet uicollectionview
 *photoscollectionview;
@property (weak,
nonatomic)
iboutlet uiswitch
 *weiboswitch;
@property (weak,
nonatomic)
iboutlet uiswitch
 *renrenswitch;
-
 (ibaction)doubanswitched:(id)sender;
-
 (ibaction)renrenswitched:(id)sender;
-
 (ibaction)weiboswitched:(id)sender;
 
+(void)
 deleteselectedimage:(nsinteger)
 index;
+(void)
 deleteselectedimagewithimage:(uiimage*)image;
@end
 

 实现文件

//
// 
 posttableviewcontroller.m
// 
 nineshare
//
// 
 created by 张昌伟 on 15/1/26.
// 
 copyright (c) 2015年 9studio. all rights reserved.
//
 
#import
 "posttableviewcontroller.h"
#import
 "nineshareservice.h"
static nsmutablearray *currentimages;
@interface posttableviewcontroller
 ()
@property (weak,
nonatomic)
iboutlet uitextview
 *sharecontent;
-
 (ibaction)poststatus:(id)sender;
-
 (ibaction)cancelpost:(id)sender;
-(void)
 loadsnsstatus;
@property (weak,
nonatomic)
iboutlet uiswitch
 *doubanswitch;
@property (weak,
nonatomic)
iboutlet uitextview
 *backgroundtextview;
@property nsmutablearray *snsarray;
//@property
 nsmutablearray *photos;
@property nineshareservice
 *datacontext;
@property nsmutabledictionary *tempdict;
 
-(void)
 opencamera;
-(void)
 openlibary;
 
@end
 
@implementation posttableviewcontroller
 
-
 (void)viewdidload
 {
 [super viewdidload];
 if(currentimages
 ==nil)
 {
 currentimages=[[nsmutablearray alloc]
 init];
 }
 //
 uncomment the following line to preserve selection between presentations.
 //
 self.clearsselectiononviewwillappear = no;
 
 //
 uncomment the following line to display an edit button in the navigation bar for this view controller.
 //
 self.navigationitem.rightbarbuttonitem = self.editbuttonitem;
 _datacontext=[nineshareservice
 getinstance];
 [self loadsnsstatus];
}
-(void)viewwillappear:(bool)animated{
 [_photoscollectionview
 reloaddata];
}
-
 (void)didreceivememorywarning
 {
 [super didreceivememorywarning];
 //
 dispose of any resources that can be recreated.
}
 
-(void)
 loadsnsstatus{
 _snsarray=[nsmutablearray arraywithcontentsoffile:[[nsbundle mainbundle]
 pathforresource:@"sns" oftype:@"plist"]];
 if(_snsarray.count>0)
 {
 [_weiboswitch
 seton:[_snsarray[0] boolvalue] animated:yes];
 [_renrenswitch
 seton:[_snsarray[1] boolvalue] animated:yes];
 [_doubanswitch
 seton:[_snsarray[2] boolvalue] animated:yes];
 }
}
-(bool)textview:(uitextview
 *)textview shouldchangetextinrange:(nsrange)range
 replacementtext:(nsstring *)text{
 if(![text
 isequaltostring:@""])
 {
 [_backgroundtextview
 sethidden:yes];
 }
 if([text
 isequaltostring:@""]&&range.length==1&&range.location==0){
 [_backgroundtextview
 sethidden:no];
 }
 if ([text
 isequaltostring:@"\n"])
 {
 [textview
 resignfirstresponder];
 return no;
 }
 return yes;
}
-(void)textviewdidbeginediting:(uitextview
 *)textview
{
 cgrect
 frame = textview.frame;
 int offset
 = frame.origin.y + 32 - (self.view.frame.size.height
 - 216.0);//键盘高度216
 
 nstimeinterval animationduration
 = 0.30f;
 [uiview
 beginanimations:@"resizeforkeyboard" context:nil];
 [uiview
 setanimationduration:animationduration];
 
 //将视图的y坐标向上移动offset个单位，以使下面腾出地方用于软键盘的显示
 if(offset
 > 0)
 self.view.frame
 = cgrectmake(0.0f, -offset, self.view.frame.size.width,
self.view.frame.size.height);
 
 [uiview
 commitanimations];
}
 
-(void)textviewdidendediting:(uitextview
 *)textview{
 self.view.frame
 =cgrectmake(0, 0, self.view.frame.size.width,
self.view.frame.size.height);
}
-(void)collectionview:(uicollectionview
 *)collectionview didselectitematindexpath:(nsindexpath *)indexpath{
 if(indexpath.row==currentimages.count)
 {
 uiactionsheet
 *action=[[uiactionsheet alloc] initwithtitle:@"选取照片" delegate:self cancelbuttontitle:@"取消" destructivebuttontitle:nil otherbuttontitles:@"从摄像头选取",
 @"从图片库选择",nil];
 [action
 showinview:self.view];
 }
 else
 {
 [ysypreviewviewcontroller
 setpreviewimage:currentimages[indexpath.row]];
 [self.navigationcontroller
 pushviewcontroller:[[uistoryboard storyboardwithname:@"main" bundle:[nsbundle mainbundle]]
 instantiateviewcontrollerwithidentifier:@"previewvc"]
 animated:yes];
 }
}
 
-(nsinteger)collectionview:(uicollectionview
 *)collectionview numberofitemsinsection:(nsinteger)section{
 return currentimages.count==0?1:currentimages.count+1;
}
-(uicollectionviewcell
 *)collectionview:(uicollectionview *)collectionview cellforitematindexpath:(nsindexpath *)indexpath{
 uicollectionviewcell
 *cell=[collectionview dequeuereusablecellwithreuseidentifier:@"collectioncell" forindexpath:indexpath];
 uiimageview
 *imageview=[[uiimageview alloc] initwithframe:cgrectmake(0, 0, 50, 50)];
 if(currentimages.count==0||indexpath.row==currentimages.count)
 {
 imageview.image=[uiimage
 imagenamed:@"add"];
 }
 else{
  
 while ([cell.contentview.subviews
 lastobject] != nil)
 {
  [(uiview*)[cell.contentview.subviews
 lastobject] removefromsuperview];
 }
 imageview.image=currentimages[indexpath.row];
 }
 
 imageview.contentmode=uiviewcontentmodescaleaspectfill;
 [cell.contentview
 addsubview:imageview];
 return cell;
}
 
-(void)savesnstofile{
 nsstring *destpath=[nssearchpathfordirectoriesindomains(nsdocumentdirectory,
nsuserdomainmask,
yes)
 lastobject];
 if (![[nsfilemanager defaultmanager]
 fileexistsatpath:destpath]) {
  nsstring *path=[[nsbundle mainbundle]
 pathforresource:@"sns" oftype:@"plist"];
 [[nsfilemanager defaultmanager]
 copyitematpath:path topath:destpath error:nil];
 }
 
 if(_snsarray==nil)
 _snsarray=[[nsmutablearray alloc]
 init];
 [_snsarray
 removeallobjects];
 [_snsarray
 addobject:_weiboswitch.ison?@"yes":@"no"];
 [_snsarray
 addobject:_renrenswitch.ison?@"yes":@"no"];
 [_snsarray
 addobject:_doubanswitch.ison?@"yes":@"no"];
 if(_snsarray.count>0)
 {
 [_snsarray
 writetofile:destpath atomically:yes];
 }
}
 
-
 (ibaction)poststatus:(id)sender
 {
 if(_weiboswitch.ison)
 [[umsocialdataservice
 defaultdataservice] postsnswithtypes:@[umsharetosina] content:_sharecontent.text.length>0?_sharecontent.text: @"9share
 for ios test message" image:currentimages.count==0?nil:currentimages[0]
 location:nil urlresource:nil presentedcontroller:self completion:^(umsocialresponseentity
 *response){
  if (response.responsecode
 == umsresponsecodesuccess) {
  nslog(@"分享成功！");
  if(!(_renrenswitch.ison||_doubanswitch.ison))
  {
   [self savesnstofile];
   [self dismissviewcontrolleranimated:yes completion:nil];
  }
  }
 }];
 if(_renrenswitch.ison)
 [[umsocialdataservice
 defaultdataservice] postsnswithtypes:@[umsharetorenren] content:_sharecontent.text.length>0?_sharecontent.text: @"9share
 for ios test message" image:currentimages.count==0?nil:currentimages[0]
 location:nil urlresource:nil presentedcontroller:self completion:^(umsocialresponseentity
 *response){
  if (response.responsecode
 == umsresponsecodesuccess) {
  nslog(@"分享成功！");
  if(!_doubanswitch.ison)
  {
   [self savesnstofile];
   [self dismissviewcontrolleranimated:yes completion:nil];
  }
  }
 }];
 if(_doubanswitch.ison)
 [[umsocialdataservice
 defaultdataservice] postsnswithtypes:@[umsharetodouban] content:_sharecontent.text.length>0?_sharecontent.text: @"9share
 for ios test message" image:currentimages.count==0?nil:currentimages[0]
 location:nil urlresource:nil presentedcontroller:self completion:^(umsocialresponseentity
 *response){
  if (response.responsecode
 == umsresponsecodesuccess) {
  nslog(@"分享成功！");
  [self savesnstofile];
  [self dismissviewcontrolleranimated:yes completion:nil];
  }
 }];
 
 
}
 
-(void)imagepickercontroller:(uiimagepickercontroller
 *)picker didfinishpickingmediawithinfo:(nsdictionary *)info{
 [picker
 dismissviewcontrolleranimated:yes completion:nil];
 uiimage
 *image=[info objectforkey:uiimagepickercontrolleroriginalimage];
 nsdata *tempdata=uiimagejpegrepresentation(image,
 0.5f);
 image=[uiimage
 imagewithdata:tempdata];
 if(currentimages
 ==nil)
 {
 currentimages=[[nsmutablearray alloc]
 init];
 }
 [currentimages
 addobject:image];
 [_photoscollectionview
 reloaddata];
 //
 [self saveimage:image withname:@""]
}
 
-(void)imagepickercontrollerdidcancel:(uiimagepickercontroller
 *)picker{
 [picker
 dismissviewcontrolleranimated:yes completion:nil];
}
-
 (ibaction)cancelpost:(id)sender
 {
 [self dismissviewcontrolleranimated:yes completion:nil];
}
 
 
-(void)actionsheet:(uiactionsheet
 *)actionsheet clickedbuttonatindex:(nsinteger)buttonindex{
 
 switch (buttonindex)
 {
 case 0:
  [self opencamera];
  break;
 case 1:
  [self openlibary];
  break;
  default:
  break;
 }
}
-(void)opencamera{
 //uiimagepickercontrollersourcetype
 *type=uiimagepickercontrollersourcetypecamera;
 if([uiimagepickercontroller
 issourcetypeavailable:uiimagepickercontrollersourcetypecamera])
 {
  uiimagepickercontroller
 *picker=[[uiimagepickercontroller alloc] init];
  picker.delegate=self;
  picker.sourcetype=uiimagepickercontrollersourcetypecamera;
  picker.allowsediting=yes;
  [self presentviewcontroller:picker
 animated:yes completion:nil];
  
 }
}
-(void)openlibary{
 if([uiimagepickercontroller
 issourcetypeavailable:uiimagepickercontrollersourcetypephotolibrary])
 {
 uiimagepickercontroller
 *picker=[[uiimagepickercontroller alloc] init];
 picker.delegate=self;
 picker.sourcetype=uiimagepickercontrollersourcetypephotolibrary;
 picker.allowsediting=yes;
 [self presentviewcontroller:picker
 animated:yes completion:nil];
  
 }
 
}
-(void)
 saveimage:(uiimage *)image withname:(nsstring *)name
{
 nsdata *imagedata=uiimagejpegrepresentation(image,
 0.5);
 nsstring *path=[nstemporarydirectory()
 stringbyappendingpathcomponent:name];
 [imagedata
 writetofile:path atomically:yes];
 
}
-
 (ibaction)doubanswitched:(id)sender
 {
 if(_doubanswitch.ison){
 if(![umsocialaccountmanager
 isoauthandtokennotexpired:umsharetodouban])
 {
  //进入授权页面
  [umsocialsnsplatformmanager
 getsocialplatformwithname:umsharetodouban].loginclickhandler(self,[umsocialcontrollerservice
 defaultcontrollerservice],yes,^(umsocialresponseentity
 *response){
  if (response.responsecode
 == umsresponsecodesuccess) {
   //获取微博用户名、uid、token等
   umsocialaccountentity
 *snsaccount = [[umsocialaccountmanager socialaccountdictionary] valueforkey:umsharetodouban];
   nslog(@"username
 is %@, uid is %@, token is %@",snsaccount.username,snsaccount.usid,snsaccount.accesstoken);
   //进入你的分享内容编辑页面
   umsocialaccountentity
 *doubanaccount = [[umsocialaccountentity alloc] initwithplatformname:umsharetodouban];
   doubanaccount.usid
 = snsaccount.usid;
   doubanaccount.accesstoken
 = snsaccount.accesstoken;
   // 
 weiboaccount.openid = @"tencent weibo openid";  //腾讯微博账户必需设置openid
   //同步用户信息
   [umsocialaccountmanager
 postsnsaccount:doubanaccount completion:^(umsocialresponseentity *response){
   if (response.responsecode
 == umsresponsecodesuccess) {
    //在本地缓存设置得到的账户信息
    [umsocialaccountmanager
 setsnsaccount:doubanaccount];
    //进入你自定义的分享内容编辑页面或者使用我们的内容编辑页面
   }}];
  }
  else {
   [_doubanswitch
 seton:no animated:yes];
  }
  });
 }
 }
}
 
-
 (ibaction)renrenswitched:(id)sender
 {
 if(_doubanswitch.ison)
 {
 if(![umsocialaccountmanager
 isoauthandtokennotexpired:umsharetorenren])
 {
  //进入授权页面
  [umsocialsnsplatformmanager
 getsocialplatformwithname:umsharetorenren].loginclickhandler(self,[umsocialcontrollerservice
 defaultcontrollerservice],yes,^(umsocialresponseentity
 *response){
  if (response.responsecode
 == umsresponsecodesuccess) {
   //获取微博用户名、uid、token等
   umsocialaccountentity
 *snsaccount = [[umsocialaccountmanager socialaccountdictionary] valueforkey:umsharetorenren];
   nslog(@"username
 is %@, uid is %@, token is %@",snsaccount.username,snsaccount.usid,snsaccount.accesstoken);
   //进入你的分享内容编辑页面
   umsocialaccountentity
 *renrenaccount = [[umsocialaccountentity alloc] initwithplatformname:umsharetorenren];
   renrenaccount.usid
 = snsaccount.usid;
   renrenaccount.accesstoken
 = snsaccount.accesstoken;
   // 
 weiboaccount.openid = @"tencent weibo openid";  //腾讯微博账户必需设置openid
   //同步用户信息
   [umsocialaccountmanager
 postsnsaccount:renrenaccount completion:^(umsocialresponseentity *response){
   if (response.responsecode
 == umsresponsecodesuccess) {
    //在本地缓存设置得到的账户信息
    [umsocialaccountmanager
 setsnsaccount:renrenaccount];
    //进入你自定义的分享内容编辑页面或者使用我们的内容编辑页面
   }}];
  }
  else{
   [_renrenswitch
 seton:no animated:yes];
  }
  });
 }
 
 }
}
 
 
-
 (ibaction)weiboswitched:(id)sender
 {
 if(_weiboswitch.ison)
 {
 if(![umsocialaccountmanager
 isoauthandtokennotexpired:umsharetosina])
 {
  [umsocialsnsplatformmanager
 getsocialplatformwithname:umsharetosina].loginclickhandler(self,[umsocialcontrollerservice
 defaultcontrollerservice],yes,^(umsocialresponseentity
 *response){
  if(response.responsecode==umsresponsecodesuccess){
   umsocialaccountentity
 *snsaccount=[[umsocialaccountmanager socialaccountdictionary] valueforkey:umsharetosina];
   umsocialaccountentity
 *sinaaccount=[[umsocialaccountentity alloc] initwithplatformname:umsharetosina];
   //缓存到本地
   sinaaccount.usid
 = snsaccount.usid;
   sinaaccount.accesstoken
 = snsaccount.accesstoken;
   // 
 weiboaccount.openid = @"tencent weibo openid";  //腾讯微博账户必需设置openid
   //同步用户信息
   [umsocialaccountmanager
 postsnsaccount:sinaaccount completion:^(umsocialresponseentity *response){
   if (response.responsecode
 == umsresponsecodesuccess) {
    //在本地缓存设置得到的账户信息
    [umsocialaccountmanager
 setsnsaccount:sinaaccount];
    //进入你自定义的分享内容编辑页面或者使用我们的内容编辑页面
   }}];
 
  }
  else
  {
   [_weiboswitch
 seton:no animated:yes];
  }
  });
 }
 }
}
 
+(void)deleteselectedimage:(nsinteger)index
{
 if(currentimages!=nil)
 [currentimages
 removeobjectatindex:index];
}
+(void)deleteselectedimagewithimage:(uiimage
 *)image{
 if(currentimages!=nil)
 [currentimages
 removeobject:image];
 
}
@end 

 预览界面：

//
// ysypreviewviewcontroller.h
// nineshare
//
// created by zhangchangwei on 15/2/1.
// copyright (c) 2015年 9studio. all rights reserved.
//
 
#import <uikit/uikit.h>
#import "posttableviewcontroller.h"
 
@interface ysypreviewviewcontroller : uiviewcontroller<uiactionsheetdelegate>
+(void) setpreviewimage:(uiimage *)image;
@end

//
// ysypreviewviewcontroller.m
// nineshare
//
// created by zhangchangwei on 15/2/1.
// copyright (c) 2015年 9studio. all rights reserved.
//
 
#import "ysypreviewviewcontroller.h"
static uiimage *currentimage;
@interface ysypreviewviewcontroller ()
- (ibaction)deleteselectedimage:(id)sender;
@property (weak, nonatomic) iboutlet uiimageview *previewimageview;
 
@end
 
@implementation ysypreviewviewcontroller
 
- (void)viewdidload {
 [super viewdidload];
 // do any additional setup after loading the view.
 _previewimageview.image=currentimage;
}
 
- (void)didreceivememorywarning {
 [super didreceivememorywarning];
 // dispose of any resources that can be recreated.
}
 
/*
#pragma mark - navigation
 
// in a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareforsegue:(uistoryboardsegue *)segue sender:(id)sender {
 // get the new view controller using [segue destinationviewcontroller].
 // pass the selected object to the new view controller.
}
*/
 
- (ibaction)deleteselectedimage:(id)sender {
 uiactionsheet *action=[[uiactionsheet alloc] initwithtitle:@"要删除这张照片吗？" delegate:self cancelbuttontitle:@"取消" destructivebuttontitle:@"删除" otherbuttontitles: nil];
 [action showinview:self.view];
}
-(void)actionsheet:(uiactionsheet *)actionsheet clickedbuttonatindex:(nsinteger)buttonindex{
 if(buttonindex==actionsheet.cancelbuttonindex)
 {
 return;
 }
 else
 {
 [posttableviewcontroller deleteselectedimagewithimage:currentimage];
 [self.navigationcontroller poptorootviewcontrolleranimated:yes];
 }
}
 
+(void)setpreviewimage:(uiimage *)image{
 currentimage=image;
}
@end

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。