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iOS文件预览分享小技能示例

2022-09-11 12:24:02

目录

前言

I 第三方SDK分享文件

1.1 微信SDK

1.2 友盟SDK

II 原生API的文件预览及其他应用打开

2.1 预览文件

2.2 文件分享

2.3 控制是否显示copy、 print、saveToCameraRoll

III 案例

3.1 文件下载和预览

3.2 使用数据模型保存下载文件路径

3.3 使用数据模型分享文件

3.4 清理缓存

前言

应用场景：文件下载、打印

I 第三方SDK分享文件

1.1 微信SDK /** 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.webp"]]; 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]; } 1.2 友盟SDK #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 II 原生API的文件预览及其他应用打开 - (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

获取NSURL

//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"];

实例化UIDocumentInteractionController

UIDocumentInteractionController *documentController = [UIDocumentInteractionController interactionControllerWithURL:url]; documentController.delegate = self;//UIDocumentInteractionControllerDelegate 2.1 预览文件 [documentController presentPreviewAnimated:YES]; // 预览文件

2.2 文件分享 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

2.3 控制是否显示copy、 print、saveToCameraRoll #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; } III 案例 3.1 文件下载和预览 - (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; } 3.2 使用数据模型保存下载文件路径

懒加载

// 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; }

预览文件

- (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 } 3.3 使用数据模型分享文件

@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]; } 3.4 清理缓存

获取沙盒缓存路径

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

清理沙河文件缓存

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

清理WKWebView的缓存

+ (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(); } } }

清理图片缓存

+(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:^{ }]; }

以上就是iOS文件预览分享小技能示例的详细内容，更多关于iOS文件预览分享的资料请关注易知道(ezd.cc)其它相关文章！

文件预览分享示例第三方

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