iOS文件预览分享小技能示例

/** enum WXScene { WXSceneSession  = 0, WXSceneTimeline = 1, WXSceneFavorite = 2, }; 文件真实数据内容 * @note 大小不能超过10M */ @property (nonatomic, retain) NSData    *fileData; */ - (void)sendFileContent { WXMediaMessage *message = [WXMediaMessage message]; message.title = @"ML.pdf"; message.description = @"Pro CoreData"; [message setThumbImage:[UIImage imageNamed:@"res2.jpg-600"]]; WXFileObject *ext = [WXFileObject object]; ext.fileExtension = @"pdf"; NSString* filePath = [[NSBundle mainBundle] pathForResource:@"ML" ofType:@"pdf"]; ext.fileData = [NSData dataWithContentsOfFile:filePath]; //+ (nullable instancetype)dataWithContentsOfURL:(NSURL *)url; message.mediaObject = ext; SendMessageToWXReq* req = [[[SendMessageToWXReq alloc] init]autorelease]; req.bText = NO; req.message = message; req.scene = WXSceneSession; [WXApi sendReq:req completion:nil]; } 

 #pragma mark - UMFileObject /*! @brief 多媒体消息中包含的文件数据对象 * * @see UMShareObject */ @interface UMShareFileObject : UMShareObject /** 文件后缀名 * @note 长度不超过64字节 */ @property (nonatomic, retain) NSString  *fileExtension; /** 文件真实数据内容 * @note 大小不能超过10M */ @property (nonatomic, retain) NSData    *fileData; /** 文件的名字(不包含后缀) * @note 长度不超过64字节 */ @property (nonatomic, retain) NSString  *fileName; @end 

- (BOOL)presentOptionsMenuFromRect:(CGRect)rect inView:(UIView *)view animated:(BOOL)animated; - (BOOL)presentOptionsMenuFromBarButtonItem:(UIBarButtonItem *)item animated:(BOOL)animated; // Bypasses the menu and opens the full screen preview window for the item at URL.  Returns NO if the item could not be previewed. // Note that you must implement the delegate method documentInteractionControllerViewControllerForPreview: to preview the document. - (BOOL)presentPreviewAnimated:(BOOL)animated;//预览文件 // Presents a menu allowing the user to open the document in another application.  The menu // will contain all applications that can open the item at URL. // Returns NO if there are no applications that can open the item at URL. - (BOOL)presentOpenInMenuFromRect:(CGRect)rect inView:(UIView *)view animated:(BOOL)animated;//包括快速预览菜单、打印、复制 - (BOOL)presentOpenInMenuFromBarButtonItem:(UIBarButtonItem *)item animated:(BOOL)animated;//不包括包括快速预览菜单 

//方式1： NSString* filePath = [[NSBundle mainBundle] pathForResource:@"ML" ofType:@"pdf"]; NSURL *url = [NSURL fileURLWithPath:filePath]; // 方式2 //NSURL *url = [[NSBundle mainBundle] URLForResource:@"ML" withExtension:@"pdf"]; 

UIDocumentInteractionController *documentController = [UIDocumentInteractionController interactionControllerWithURL:url]; documentController.delegate = self;//UIDocumentInteractionControllerDelegate 

[documentController presentPreviewAnimated:YES]; // 预览文件 

        CGRect rect = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height); [documentController presentOptionsMenuFromRect:rect inView:self.view  animated:YES];//包括快速预览菜单、打印、复制 //        [documentController presentOpenInMenuFromRect:rect inView:self.view animated:YES];//不包括包括快速预览菜单 

#pragma mark - UIDocumentInteractionControllerDelegate - (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)interactionController{ return self; } // /** print: saveToCameraRoll:  copy: */ - (BOOL)documentInteractionController:(UIDocumentInteractionController *)controller canPerformAction:(SEL)action{ NSLog(@"canPerformAction  %s %@ ", __func__,NSStringFromSelector(action)); //NSStringFromSelector(_cmd)  //当前选择器的名字 //    return NO;不显示copy print return YES;//显示copy print } - (BOOL)documentInteractionController:(UIDocumentInteractionController *)controller performAction:(SEL)action{ NSLog(@"canPerformAction  %s", __func__); return YES;//显示copy print //    return NO; } 

- (void)openfile:(CRMfilePreviewCellM*)m{ //        NSURL *relativeToURL = [NSURL URLWithString:m.url ];//必须先下载，否则无法查看文件内容 [SVProgressHUD showWithStatus:@"加载中..."]; NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:m.url]]; [SVProgressHUD dismiss]; if(data== nil){ [SVProgressHUD showInfoWithStatus:@"文件下载失败"]; return ; } //            //用单例类 NSFileManager的对象,将文件写入本地 NSFileManager *fileManage = [NSFileManager defaultManager]; NSString *tmp = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject]; //    NSString *tmp = NSTemporaryDirectory(); NSString *fileName = m.fileName; tmp =[tmp stringByAppendingPathComponent:fileName]; BOOL isSuccess = [fileManage createFileAtPath:tmp contents:data attributes:nil]; if(isSuccess){ NSURL *url = [NSURL fileURLWithPath:tmp]; UIDocumentInteractionController *documentController = [UIDocumentInteractionController interactionControllerWithURL:url]; //UIDocumentInteractionController delegate must implement documentInteractionControllerViewControllerForPreview: to allow preview documentController.delegate = self;//UIDocumentInteractionControllerDelegate [documentController presentPreviewAnimated:YES]; // 预览文件 } } #pragma mark - UIDocumentInteractionControllerDelegate - (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)interactionController{ return self; } // /** print: saveToCameraRoll:  copy: */ - (BOOL)documentInteractionController:(UIDocumentInteractionController *)controller canPerformAction:(SEL)action{ NSLog(@"canPerformAction  %s %@ ", __func__,NSStringFromSelector(action)); //NSStringFromSelector(_cmd)  //当前选择器的名字 //    return NO;不显示copy print return YES;//显示copy print } - (BOOL)documentInteractionController:(UIDocumentInteractionController *)controller performAction:(SEL)action{ NSLog(@"canPerformAction  %s", __func__); return YES;//显示copy print //    return NO; } 

    //        NSURL *relativeToURL = [NSURL URLWithString:m.url ];//必须先下载，否则无法查看文件内容 - (NSString *)filePathFromUrl{ if(_filePathFromUrl !=nil){ return _filePathFromUrl; } NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:self.url]]; if(data== nil){ [SVProgressHUD showInfoWithStatus:@"文件下载失败"]; return nil; } //            //用单例类 NSFileManager的对象,将文件写入本地 NSFileManager *fileManage = [NSFileManager defaultManager]; NSString *tmp = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject]; //    NSString *tmp = NSTemporaryDirectory(); NSString *fileName = self.fileName; tmp =[tmp stringByAppendingPathComponent:fileName]; BOOL isSuccess = [fileManage createFileAtPath:tmp contents:data attributes:nil]; _filePathFromUrl = tmp; if(!isSuccess){ _filePathFromUrl = nil; } return _filePathFromUrl; } 

- (void)openfile:(CRMfilePreviewCellM*)m{ if(!m.filePathFromUrl){ return; } NSURL *url = [NSURL fileURLWithPath:m.filePathFromUrl]; UIDocumentInteractionController *documentController = [UIDocumentInteractionController interactionControllerWithURL:url]; //UIDocumentInteractionController delegate must implement documentInteractionControllerViewControllerForPreview: to allow preview documentController.delegate = self;//UIDocumentInteractionControllerDelegate [documentController presentPreviewAnimated:YES]; // 预览文件 } 

@property (nonatomic,copy) NSString *fileName; @property (nonatomic,copy) NSString *url; // @property (nonatomic,copy) NSString *filePathFromUrl; /** /** 文件真实数据内容 * @note微信文件分享 大小不能超过10M */ @property (nonatomic, retain) NSData    *fileData; - (void)sendFileContent; - (NSData *)fileData{ if(_fileData==nil){ NSString* filePath= [self filePathFromUrl]; _fileData =[NSData dataWithContentsOfFile:filePath]; } return _fileData; } - (void)sendFileContent { WXMediaMessage *message = [WXMediaMessage message]; message.title = self.fileName; message.description =self.fileName; [message setThumbImage:[UIImage imageNamed:self.iconName]]; WXFileObject *ext = [WXFileObject object]; ext.fileExtension =self.fileExtension; ext.fileData =self.fileData; //+ (nullable instancetype)dataWithContentsOfURL:(NSURL *)url; message.mediaObject = ext; SendMessageToWXReq* req = [[SendMessageToWXReq alloc] init]; req.bText = NO; req.message = message; req.scene = WXSceneSession; [WXApi sendReq:req completion:nil]; } 

+ (nullable NSString *)userCacheDirectory { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES); return paths.firstObject; } 

- (void)removeAllData { [self.fileManager removeItemAtPath:self.diskCachePath error:nil]; [self.fileManager createDirectoryAtPath:self.diskCachePath withIntermediateDirectories:YES attributes:nil error:NULL]; } 

+ (void)clearWebCacheCompletion:(dispatch_block_t)completion { if (@available(iOS 9.0, *)) { NSSet *websiteDataTypes = [WKWebsiteDataStore allWebsiteDataTypes]; NSDate *dateFrom = [NSDate dateWithTimeIntervalSince1970:0]; [[WKWebsiteDataStore defaultDataStore] removeDataOfTypes:websiteDataTypes modifiedSince:dateFrom completionHandler:completion]; } else { NSString *libraryDir = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES)[0]; NSString *bundleId  =  [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleIdentifier"]; NSString *webkitFolderInLib = [NSString stringWithFormat:@"%@/WebKit",libraryDir]; NSString *webKitFolderInCaches = [NSString stringWithFormat:@"%@/Caches/%@/WebKit",libraryDir,bundleId]; NSString *webKitFolderInCachesfs = [NSString stringWithFormat:@"%@/Caches/%@/fsCachedData",libraryDir,bundleId]; NSError *error; /* iOS8.0 WebView Cache path */ [[NSFileManager defaultManager] removeItemAtPath:webKitFolderInCaches error:&error]; [[NSFileManager defaultManager] removeItemAtPath:webkitFolderInLib error:nil]; /* iOS7.0 WebView Cache path */ [[NSFileManager defaultManager] removeItemAtPath:webKitFolderInCachesfs error:&error]; if (completion) { completion(); } } } 

+(void)clearCache:(NSString *)path{ NSFileManager *fileManager=[NSFileManager defaultManager]; if ([fileManager fileExistsAtPath:path]) { NSArray *childerFiles=[fileManager subpathsAtPath:path]; for (NSString *fileName in childerFiles) { //如有需要，加入条件，过滤掉不想删除的文件 NSString *absolutePath=[path stringByAppendingPathComponent:fileName]; [fileManager removeItemAtPath:absolutePath error:nil]; } } //    [[SDImageCache sharedImageCache] cleanDisk]; [[SDImageCache sharedImageCache] clearDiskOnCompletion:^{ }]; }