AFNetworking – 通过UIProgressView下载多个文件+监控

我正在尝试将我的代码从ASIHTTPRequest更改为AFNetworking。 目前我想选择10-15个不同的HTTP URL（文件）并将它们下载到文档文件夹。

使用ASIHTTPRequest非常简单

[myQueue setDownloadProgressDelegate:myUIProgressView]; 

在AFNetworking中，我无法弄清楚如何做到这一点。 我有以下代码下载文件，存储它们并在文件成功下载时通知，但我无法为此队列创建总大小的进度条。

 for (i=0; i<3; i++) { NSString *urlpath = [NSString stringWithFormat:@"http://www.domain.com/file.zip"]; NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlpath]]; AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *path = [[paths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:@"testFile%i.zip",i]]; operation.outputStream = [NSOutputStream outputStreamToFileAtPath:path append:NO]; [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { NSLog(@"Successfully downloaded file to %@", path); } failure:^(AFHTTPRequestOperation *operation, NSError *error) { NSLog(@"Error: %@", error); }]; [operation setDownloadProgressBlock:^(NSInteger bytesWritten, NSInteger totalBytesWritten, NSInteger totalBytesExpectedToWrite) { NSLog(@"Sent %d of %d bytes, %@", totalBytesWritten, totalBytesExpectedToWrite, path); }]; [myQueue addOperation:operation]; } 

Answer 1

我想你必须创建自己的UIProgressView，我将在这个例子中调用progressView。

 progressVu = [[UIProgressView alloc] initWithFrame:CGRectMake(x, y, width, height)]; [progressVu setProgressViewStyle: UIProgressViewStyleDefault]; 

然后只需更新进度条：

 [operation setDownloadProgressBlock:^(NSInteger bytesWritten, NSInteger totalBytesWritten, NSInteger totalBytesExpectedToWrite) { float percentDone = ((float)((int)totalBytesWritten) / (float)((int)totalBytesExpectedToWrite)); progressView.progress = percentDone; NSLog(@"Sent %d of %d bytes, %@", totalBytesWritten, totalBytesExpectedToWrite, path); }]; 

Answer 2

 [operation setDownloadProgressBlock:^(NSInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) { float percentDone = ((float)((int)totalBytesRead) / (float)((int)totalBytesExpectedToRead)); progressView.progress = percentDone; }]; 

Answer 3

想象一下，假设每个文件大小为1 MB，可以通过这种方式下载200多个文件。 当您创建这么多请求（默认超时为30秒）时会发生什么？ 30秒后，您将被超时错误轰炸。

只是说’马丁