重命名iCloud文档

Question

问题

到目前为止我所拥有的是创建新本地文件并删除iCloud文件的代码.

是否可以重命名iCloud文档,以便它保留在iCloud中？

GarageBand可以做到.可以重命名iCloud歌曲.重命名完成后,歌曲仍然在iCloud中.然而,GarageBand是Apple应用程序,因此它可能使用私有api.

我目前的代码:

- (void)moveFrom:(NSURL*)sourceURL
          moveTo:(NSString*)destinationName
      completion:(void (^)())completion
{
    MyDocument *document = [[MyDocument alloc] initWithFileURL:sourceURL];
    [document openWithCompletionHandler:^(BOOL success)
    {
        NSURL *fileURL = [self.localRoot URLByAppendingPathComponent:destinationName];
        DLog(@"Create %@", fileURL);
        [document saveToURL:fileURL
           forSaveOperation:UIDocumentSaveForCreating
          completionHandler:^(BOOL success)
        {
            NSLog(@"Saved %@", fileURL);
            [document closeWithCompletionHandler:^(BOOL success) {
                // Delete the old document from a secondary thread
                dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^()
                {
                    NSFileCoordinator* fileCoordinator = [[NSFileCoordinator alloc] initWithFilePresenter:nil];
                    [fileCoordinator coordinateWritingItemAtURL:sourceURL
                                                        options:NSFileCoordinatorWritingForDeleting
                                                          error:nil
                                                     byAccessor:^(NSURL* writingURL) {
                        NSFileManager* fileManager = [[NSFileManager alloc] init];
                        [fileManager removeItemAtURL:writingURL error:nil];
                        DLog(@"Deleted %@", sourceURL);
                        completion();
                    }];
                });
            }];
        }];
    }];
}

更新:仍然没有运气

我发现-setUbiquitous:itemAtURL:destinationURL:error:不能用于重命名文档.

如果我在已经本地的文件上调用[setUbiquitous:NO itemAtURL:oldLocalURL destinationURL:newLocalURL错误:&error],则:

错误域= NSCocoaErrorDomain代码= 512"操作无法完成.(Cocoa错误512.)"UserInfo = 0x1fdf6730 {NSURL = file:// localhost/var/mobile/Applications/4BABA000-B100-49FC-B928-B0F403FC75FF /Documents/LocalDrawing.td2/,NSUnderlyingError = 0x20940e80"操作无法完成.(LibrarianErrorDomain错误2 - 无法禁用未同步项目的同步.)"}

如果我在已经存在的云文件上调用[setUbiquitous:YES itemAtURL:oldCloudURL destinationURL:newCloudURL错误:&error],则:

错误域= NSCocoaErrorDomain代码= 512"操作无法完成.(Cocoa错误512.)"UserInfo = 0x208e9820 {NSURL = file:// localhost/var/mobile/Library/Mobile%20Documents/22DR89XVRF~com~opcodeor ~angle-draw/Documents/CloudDrawing.td2 /,NSUnderlyingError = 0x208d45b0"操作无法完成.(LibrarianErrorDomain错误2 - 无法启用同步项目的同步.)"}

因此-setUbiquitous:itemAtURL:destinationURL:error:不能用于重命名文档.

Answer 1

我终于解决了它.到目前为止这是我的代码:

- (void)_moveURL:(NSURL*)sourceURL
         destURL:(NSURL*)destinationURL
         success:(void (^)())successBlock
         failure:(void (^)(NSError *))failureBlock
{
    NSParameterAssert(sourceURL);
    NSParameterAssert(destinationURL);
    NSParameterAssert(successBlock);
    NSParameterAssert(failureBlock);

    // Do the actual renaming
    __block NSError *moveError = nil;
    __block BOOL moveSuccess = NO;
    void (^accessor)(NSURL*, NSURL*) = ^(NSURL *newURL1, NSURL *newURL2) {
        NSFileManager *fileManager = [[NSFileManager alloc] init];
        moveSuccess = [fileManager moveItemAtURL:sourceURL toURL:destinationURL error:&moveError];
    };

    // Coordinate renaming
    NSError *coordinatorError = nil;
    NSFileCoordinator *coordinator = [[NSFileCoordinator alloc] initWithFilePresenter:nil];
    [coordinator coordinateWritingItemAtURL:sourceURL
                                    options:NSFileCoordinatorWritingForMoving
                           writingItemAtURL:destinationURL
                                    options:NSFileCoordinatorWritingForReplacing
                                      error:&coordinatorError
                                 byAccessor:accessor];
    if (moveSuccess) {
        successBlock();
        return;
    }
    if (moveError) {
        failureBlock(moveError);
        return;
    }
    if (coordinatorError) {
        failureBlock(coordinatorError);
        return;
    }
    NSAssert(NO, @"should not happen");
}