从ASIHTTPRequest切换到AFNetworking - ASINetworkQueue问题

时间:2011-11-08 20:12:44

标签: objective-c ios asihttprequest afnetworking

我正在解决一个问题,我必须在队列中下载大约10个不同的大文件,我需要显示一个进度条,指示总传输的状态。我在iOS4中使用ASIHTTPRequest工作得很好,但我正在尝试转换到AFNetworking,因为ASIHTTPRequest在iOS5中存在问题而不再维护。

我知道您可以使用AFHTTPRequestOperation的downloadProgressBlock报告各个请求的进度,但我似乎找不到报告将在同一个NSOperationQueue上执行的多个请求的整体进度的方法。

有什么建议吗?谢谢!

3 个答案:

答案 0 :(得分:1)

[operation setUploadProgressBlock:^(NSInteger bytesWritten, NSInteger totalBytesWritten, NSInteger totalBytesExpectedToWrite) {
    NSLog(@"Sent %d of %d bytes", totalBytesWritten, totalBytesExpectedToWrite);
}];

操作是AFHTTPRequestOperation

答案 1 :(得分:0)

我会尝试使用子类对UIProgressView进行子类化,该子类跟踪您正在观看的所有不同项目,然后具有将它们的进度一起添加的逻辑。

使用这样的代码:

 @implementation customUIProgressView

-(void) updateItem:(int) itemNum ToPercent:(NSNumber *) percentDoneOnItem {
  [self.progressQueue  itemAtIndexPath:itemNum] = percentDoneOnItem;

  [self updateProgress];
}
-(void) updateProgress {
  float tempProgress = 0;
  for (int i=1; i <= [self.progressQueue count]; i++) {
    tempProgress += [[self.progressQueue  itemAtIndexPath:itemNum] floatValue];
  }
  self.progress = tempProgress / [self.progressQueue count];
}

答案 2 :(得分:0)

您可以将AFURLConnectionOperation子类化为2个新属性:(NSInteger)totalBytesSent(NSInteger)totalBytesExpectedToSend。您应该在NSURLConnection回调中设置这些属性,如下所示:

- (void)connection:(NSURLConnection *)__unused connection 
   didSendBodyData:(NSInteger)bytesWritten 
 totalBytesWritten:(NSInteger)totalBytesWritten 
totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite
{
    [super connection: connection didSendBodyData:bytesWritten totalBytesWritten:totalBytesWritten totalBytesExpectedToWrite:totalBytesExpectedToWrite];
    self.totalBytesSent = totalBytesWritten;
    self.totalBytesExpectedToSend = totalBytesExpectedToSend;
}

您的uploadProgress块可能如下所示:

……(NSInteger bytesWritten, NSInteger totalBytesWritten, NSInteger totalBytesExpectedToWrite) {
    NSInteger queueTotalExpected = 0;
    NSInteger queueTotalSent     = 0;
    for (AFURLConnectionOperation *operation in self.operationQueue) {
        queueTotalExpected += operation.totalBytesExpectedToSend;
        queueTotalSent     += operation.totalBytesSent;
    }
    self.totalProgress = (double)queueTotalSent/(double)queueTotalExpected;
}];