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：
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//// 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
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//// 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：
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//// 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 |
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//// 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服务器之家。
原文链接：http://blog.csdn.net/st646889325/article/details/53130375
