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
到这里就可以实现完整的带预览删除的图文分享功能了^_^