从Google云端硬盘下载文件时，下载进度状态？

我可以从Google驱动器下载文件，但我想知道下载进度。 任何人都可以告诉我该怎么做？

我已经尝试这下载文件：

NSString *downloadURL = [[self.driveFiles objectAtIndex:indexPath.row] downloadUrl]; GTMHTTPFetcher *fetcher = [self.driveService.fetcherService fetcherWithURLString:downloadURL]; filename=[[NSString alloc] init]; [fetcher beginFetchWithCompletionHandler:^(NSData *data, NSError *error) { GTLDriveFile *file = [driveFiles objectAtIndex:indexPath.row]; NSLog(@"\n\n\n\n\n"); NSLog(@"This is File Size=====>%@",file.fileSize); NSLog(@"This is file Name===>%@",file.title); if(file.downloadUrl!= nil) { if (data!=nil) { filename=file.title; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; documentsDirectory = [[paths objectAtIndex:0]stringByAppendingPathComponent:[NSString stringWithFormat:@"%@",filename]]; [data writeToFile:documentsDirectory atomically:YES]; 

Answer 1

编辑

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我find了一个更简单的解决scheme。 有一个块将用于进度的callback：

 GTMHTTPFetcher *fetcher = [self.driveService.fetcherService fetcherWithURLString:downloadURL]; GTLDriveFile *file = [driveFiles objectAtIndex:indexPath.row]; [fetcher setReceivedDataBlock:^(NSData *data) { NSLog(@"%f%% Downloaded", (100.0 / [file.fileSize longLongValue] * [data length])); }];