Question

我正在从响应中下载视频文件。我想显示HUD进度的下载进度条。但我怎么能这样做。我发送验证json到服务器和服务器验证发送回视频文件字节。我想通过使用HUD-progreasse bar显示下载百分比。

如果我调用[request setDidReceiveDataSelector:@selector(request:didReceiveBytes:)];而不是显示我得到了多少字节但它没有将字节存储到缓存文件中（它不会将文件存储到手机中）

  ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:[[NSURL alloc] initWithString:@"http://testing.io/dev.php/video/verifyReceipt"]];
  [request setPostValue:resultAsString forKey:@"verify"];// sending json in post 
[request setDidReceiveDataSelector:@selector(request:didReceiveBytes:)]; 
[request setDidFinishSelector:@selector(requestDone:)];
[request setTimeOutSeconds:120];
[request setDelegate:self];
[request setNumberOfTimesToRetryOnTimeout:2];
[request setDownloadProgressDelegate:self];
request.showAccurateProgress = YES;

[request startSynchronous];

 }
 -(void)request:(ASIHTTPRequest *)request didReceiveData:(NSData *)data
 {
[videoData appendData:data];// appending data with global NSmutabledata
  NSLog(@"data is %@",data);
   }

- (void)requestDone:(ASIHTTPRequest *)request{
//[MBProgressHUD hideHUDForView:self.view animated:YES];

// SAVED Video PATH
// Get the Document directory
NSString *documentDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
// Add your filename to the directory to create your saved video location
NSString* movLocation = [documentDirectory stringByAppendingPathComponent:[fileName stringByAppendingString:@".mov"]];

if(request.responseStatusCode==200)
{
    [videoData writeToFile:movLocation atomically:NO];
    NSLog(@"in request done sucsessfully downlaod and store in database %d",request.responseStatusCode);
    [DBHelper savePurchaseId:fileName];
    [self movieReceived];
}
else{

      NSLog(@"in request downlaod and store in database failed %@",request.responseHeaders);

}
 }
     -(void)requestFailed:(ASIHTTPRequest *)request
      {

NSLog(@"%@",request.error);

      }

Answer 1

fileUrl =下载视频的网址字符串。

    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:[fileUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]];
    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];

    operation.outputStream = [NSOutputStream outputStreamToFileAtPath:destPath append:NO];
    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject)
    {
        // Give alert that downloading successful.
        NSLog(@"Successfully downloaded file to %@", destPath);

        /* To call delegate to response the result. */
        [self.target parserDidDownloadItem:destPath]; 

        HUD.detailsLabelText = [NSString stringWithFormat:@"%@ %i%%",[JGlobals getLocalvalue:@"Downloading"],100];
        [HUD hide:TRUE];
    }
    failure:^(AFHTTPRequestOperation *operation, NSError *error)
    {
        // Give alert that downloading failed
        NSLog(@"Error: %@", error);

        /* To call delegate to response the result. */
        [self.target parserDidFailToDownloadItem:error];
        [HUD hide:TRUE];

    }];
    [operation setDownloadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite)
    {
         // Progress
         float totalProgress = (totalBytesWritten / (totalBytesExpectedToWrite * 1.0f) * 100);
         HUD.detailsLabelText = [NSString stringWithFormat:@"Downloading %i%%", MIN((int)(totalProgress), 99)];
     }];
    [operation start];

Answer 2

我正在考虑一种可能不正确的方法，但它可以帮助您避免编写大量代码。

首先将普通UIProgressView实例设置为下载进度委托，如下所示

[request setDownloadProgressDelegate:uiprogreeViewInstance];

现在ASIHTTPRequest框架将在下载进行时更新该进度视图。 ProgressView有一个名为progress的属性，范围从0.0到1.0。

现在实例化MBProgressHUD，将其添加为您想要的子视图。将progress实例的MBProgressHUD值设置为UIProgressView的值{{1}}。隐藏uiprogressview实例。

如何在Asihttp的请求响应中下载文件时显示进度条

2 个答案: