文件查看 UIDocumentInteractionContro

作者: goyohol | 来源:发表于2017-11-02 17:53 被阅读511次

    UIDocumentInteractionController是从iOS 3.2的SDK开始支持的,它是直接继承的NSObject,而不是我们想象的UIViewController。

    基础操作

    在当前“视图控制器”里面:

    NSString *cachePath = [[NSBundle mainBundle] pathForResource:@"民族" ofType:@"xlsx"]; 
    NSURL * pathUrl = [NSURL fileURLWithPath:cachePath];//文件路径
    UIDocumentInteractionController *documentController = [UIDocumentInteractionController interactionControllerWithURL:pathUrl];
    documentController.delegate = self;
    
    [documentController presentPreviewAnimated:YES];//跳转到查看页面
    
    
    
    #pragma mark - UIDocumentInteractionControllerDelegate
    -(UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller{
        return self;
    }
    -(UIView *)documentInteractionControllerViewForPreview:(UIDocumentInteractionController *)controller{
        return self.view;
    }
    -(CGRect)documentInteractionControllerRectForPreview:(UIDocumentInteractionController *)controller{
        return self.view.bounds;
    }
    //-(void)documentInteractionController:(UIDocumentInteractionController *)controller willBeginSendingToApplication:(NSString *)application {
    //    NSLog(@"%@",controller);
    //}
    //-(void)documentInteractionController:(UIDocumentInteractionController *)controller didEndSendingToApplication:(NSString *)application {
    //    NSLog(@"%@",controller);
    //}
    //-(void)documentInteractionControllerDidDismissOpenInMenu:(UIDocumentInteractionController *)controller {
    //    NSLog(@"%@",controller);
    //}
    




    🌰“支持类型”的展示例子:


    播放音乐
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);//文件路径
    NSString *docDir_Str = [paths objectAtIndex:0];
    NSString *doc_PathStr = [docDir_Str stringByAppendingString:@"/localFile"];
    
    //直接打开
    fullFileNameStr = @"心跳(原味版)-于文文.mp3";
    NSString * filePathStr = [doc_PathStr stringByAppendingPathComponent:fullFileNameStr];
    NSURL * fileUrl = [NSURL fileURLWithPath:filePathStr];
    UIDocumentInteractionController *documentController =  [UIDocumentInteractionController interactionControllerWithURL:fileUrl];
    documentController.delegate = self;
    //跳转到文档查看页面
    [documentController presentPreviewAnimated:YES];
    

    播放音乐,效果:



    播放视频
    fullFileNameStr = @"11111.mp4";
    

    播放视频,效果:



    文档查看
    fullFileNameStr = @"民族.xlsx";
    

    文档查看,效果:


    图片查看
    fullFileNameStr = @"chx.jpg";
    

    图片查看,效果:

    其文件查看非常强大,支持很多类型!




    🌰“文档操作”例子
    在自己App里面,对文档 进行操作:(可自动检测可进行分享的App)






    打开 第三方App里面的文档

    当我们需要打开 在 第三方App里面的文档时,可以在“info.plist”中添加键值对来搞定这个问题:


    Source Code格式

    <key>CFBundleDocumentTypes</key>
    <array>
       <dict>
           <key>CFBundleTypeName</key>          <!--类型名-->
           <string>pdf</string>                 <!--随意取名字-->
           <key>CFBundleTypeIconFiles</key>     <!--类型文件的icon图-->
           <array>
               <string>MySmallIcon.png</string>
               <string>MyLargeIcon.png</string>
           </array>
           <key>LSItemContentTypes</key>        <!--所关联的UTI格式,一个类型名可以对应多个UTI-->
           <array>
               <string>com.adobe.pdf</string>
           </array>
           <key>LSHandlerRank</key>             <!--是不是app所拥有的类型,Default:不是,Owner:是-->
           <string>Owner</string>
       </dict>
    </array>
    


    在以下链接中,有文件后缀UTI(统一类型标识符) 的对应表:
    https://developer.apple.com/library/mac/#documentation/Miscellaneous/Reference/UTIRef/Articles/System-DeclaredUniformTypeIdentifiers.html


    “info.plist”修改实例:(“Property List”格式)


    如何导入文档:

    当我们从其他的App,用“readerApp”打开文档时,会调用“readerApp”的方法!
    - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation { }

    其中,url对应的就是该文档位置
    实际在此时,该文档已经复制到“readerApp”的“document/inbox”文件夹下。
    我们需要将该文档移动到其他位置,因为每次其他应用调用“readerApp”打开该文档时,都会在inbox文件夹下复制一份文件(不考虑该文件是否已经存在),如果多次使用,那么inbox将会占用大量的存储空间。

    总结:记得在移动了文档后,要删除掉inbox路径里面的内容












    自己的文档阅读APP 书写🌰:

    1.在“info.plist”里面,添加可以支持的所有类型:(“Source Code格式:)

    <key>CFBundleDocumentTypes</key>
    <array>
        <dict>
            <key>CFBundleTypeName</key>
            <string>com.myapp.common-data</string>
            <key>LSItemContentTypes</key>
            <array>        <!--罗列了 支持的类型-->
                <string>com.microsoft.powerpoint.ppt</string>
                <string>public.item</string>
                <string>com.microsoft.word.doc</string>
                <string>com.adobe.pdf</string>
                <string>com.microsoft.excel.xls</string>
                <string>public.image</string>
                <string>public.content</string>
                <string>public.composite-content</string>
                <string>public.archive</string>
                <string>public.audio</string>
                <string>public.movie</string>
                <string>public.text</string>
                <string>public.data</string>
            </array>
        </dict>
    </array>
    

    这样,其他应用程序的文档在使用第三方打开的时候,就可以看到你的应用程序了。

    对应的“Property List格式:


    文档查看操作

    点击该文档,打开 对文档,进行操作


    添加可支持的类型之前 添加可支持的类型之后
    无 自己的App,可供选择 有 自己的App,可供选择




    反复导入文档:

    每次导入,都会在inbox文件夹下复制一份文件。
    所以出现了:名称后面文档 命名为“-3”的情况




    解决操作

    导入文档后,不管是否保存在本地,都要删除Inbox 面的文件

    //fileNameStr:文件名  (导入所产生文档所在的Url 获取来的)
    NSString * fileNameStr = [_docUrl lastPathComponent];
    
    NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString * docDir_Str = [paths objectAtIndex:0];//沙盒文档路径
    
    //删除文件的路径
    NSString * deleteDocPath = [[docDir_Str stringByAppendingPathComponent:@"Inbox"] stringByAppendingPathComponent:fileNameStr];
    //删除Inbox里面的文件
    [[NSFileManager defaultManager] removeItemAtPath:deleteDocPath error:nil]; 
    




    2.文档导入操作

    全局变量:NSURL * _docUrl;//文档Url

    /** 文档导入 */
    - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {  
          if (self.window) { 
              if (url) {
                  _docUrl = url;
                  NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
                  NSString *docDir_Str = [paths objectAtIndex:0];
                  NSString *pathStr = [docDir_Str stringByAppendingString:@"/localFile"];
                  NSFileManager * fileManager = [NSFileManager defaultManager];
                  if(![fileManager fileExistsAtPath:pathStr]){
                      //如果不存在,则说明是第一次运行这个程序,那么建立这个文件夹
                      NSString *directryPath = [docDir_Str stringByAppendingPathComponent:@"localFile"];
                      [fileManager createDirectoryAtPath:directryPath withIntermediateDirectories:YES attributes:nil error:nil];
                  }
                
    
                  //提醒视图: UIActionSheet
                  UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"是否需要保存文档?" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"确认" otherButtonTitles:nil];
                  [actionSheet showInView:self.window.rootViewController.view];
    
    
                  //在NSUserDefaults里:保存“从文档进入App”为YES
                  [User_Def setBool:YES forKey:JoinAPPFromDocumVC]; 
                  [User_Def synchronize];
                
                  //跳转,查看文档
                  UIDocumentInteractionController *documentController =  [UIDocumentInteractionController interactionControllerWithURL:url];
                  documentController.delegate = self;
                  [documentController presentPreviewAnimated:YES];//跳转到查看页面
              }
         }
    
    }
    


    3.文档查看UIDocumentInteractionControllerDelegate

    #pragma mark - UIDocumentInteractionControllerDelegate
    -(UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller{
        return self.window.rootViewController;
    }
    -(UIView *)documentInteractionControllerViewForPreview:(UIDocumentInteractionController *)controller{
        return self.window.rootViewController.view;
    }
    -(CGRect)documentInteractionControllerRectForPreview:(UIDocumentInteractionController *)controller{
        return self.window.rootViewController.view.bounds;
    }
    //-(void)documentInteractionController:(UIDocumentInteractionController *)controller willBeginSendingToApplication:(NSString *)application {
    //    NSLog(@"%@",controller);
    //}
    //-(void)documentInteractionController:(UIDocumentInteractionController *)controller didEndSendingToApplication:(NSString *)application {
    //    NSLog(@"%@",controller);
    //}
    //-(void)documentInteractionControllerDidDismissOpenInMenu:(UIDocumentInteractionController *)controller {
    //    NSLog(@"%@",controller);
    //}
    




    4.提醒视图:UIActionSheetDelegate
    以及
    5.保存操作

    #pragma mark - UIActionSheetDelegate
    - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
        NSLog(@"ACActionSheet delegate - %ld",buttonIndex);
    
        if (buttonIndex == 0) { //是否考虑 保存
            NSFileManager * fileManager = [NSFileManager defaultManager];
            NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
            NSString *docDir_Str = [paths objectAtIndex:0];
            NSString *pathStr = [docDir_Str stringByAppendingString:@"/localFile"];
            NSDirectoryEnumerator *enumerator = [fileManager enumeratorAtPath:pathStr];//遍历
        
        
            NSArray *fileList = [NSArray arrayWithArray:[fileManager contentsOfDirectoryAtPath:pathStr error:nil]];
            if (fileList.count == 0) { //个数为0
                NSString * fileNameStr = [_docUrl lastPathComponent];
                NSString * DocPathStr = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents/localFile"] stringByAppendingPathComponent:fileNameStr];   //保存的路径
                NSData * data = [NSData dataWithContentsOfURL:_docUrl];//保存的数据
            
                if ([data writeToFile:DocPathStr atomically:YES]) {
                    NSString * deleteDocPath = [[docDir_Str stringByAppendingPathComponent:@"Inbox"] stringByAppendingPathComponent:fileNameStr];
                    [fileManager removeItemAtPath:deleteDocPath error:nil]; //删除Inbox里面的文件
                }
            } else {
                for (NSString *fileName in enumerator) {
                    NSLog(@"%@",fileName);
                    NSString * fileNameStr = [_docUrl lastPathComponent];
                    NSString * fileName_total = [fileName componentsSeparatedByString:@" -"][0];
                    NSString * fileNameStr_total = [fileNameStr componentsSeparatedByString:@" -"][0];
                    if (![fileName_total isEqualToString:fileNameStr_total]) {
                        NSString * DocStr = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents/localFile"] stringByAppendingPathComponent:fileNameStr];   //保存的路径
                        NSData * data = [NSData dataWithContentsOfURL:_docUrl];//保存的数据
                    
                        if ([data writeToFile:DocStr atomically:YES]) {
                            NSString * deleteDocPath = [[docDir_Str stringByAppendingPathComponent:@"Inbox"] stringByAppendingPathComponent:fileNameStr];
                            [fileManager removeItemAtPath:deleteDocPath error:nil]; //删除Inbox里面的文件
                        }
                    }
                }
            }
        
        } else { //不保存在本地
    
            //删除Inbox里面的文件
            NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
            NSString *docDir_Str = [paths objectAtIndex:0];
            NSString * fileNameStr = [_docUrl lastPathComponent];
            NSString * deleteDocPath = [[docDir_Str stringByAppendingPathComponent:@"Inbox"] stringByAppendingPathComponent:fileNameStr];
            [[NSFileManager defaultManager] removeItemAtPath:deleteDocPath error:nil];
        }
    }
    




    当然,最简单的 删除Inbox”里文件操作:

    就是 —— 在文档展示界面消失后,再删除Inbox面的文件

    实现代理方法:

    - (void)documentInteractionControllerDidEndPreview:(UIDocumentInteractionController *)controller { //结束 展示文档
       //(不保存,直接删除) 删除“Inbox”里面的文件
       NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
       NSString *docDir_Str = [paths objectAtIndex:0];
       NSString * fileNameStr = [_docUrl lastPathComponent];//文件名
       NSString * deleteDocPath = [[docDir_Str stringByAppendingPathComponent:@"Inbox"] stringByAppendingPathComponent:fileNameStr];
       [[NSFileManager defaultManager] removeItemAtPath:deleteDocPath error:nil];
    
       NSLog(@"%@",controller);
    }
    















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