Question

I’m currently trying to download some files with AFNetworking, for relative small files this seems to work, but I’m trying a slighter larger file (17MB) and it seems to just crash without any error.

The url is linking to a local file: http://test.local/wp-content/uploads/2012/07/test.pdf (I’m running it in the simulator, so this is accessible)

The only output I get is in the progress block

progress: 0.009022

When I check the filesystem, it appears that the file is there, but only a few kb.

Is this a known error with AFNetworking, or maybe I’m just doing something wrong.

- (void)downloadIssue:(Issue *)issue
{
    NSString *fileName = [issue.pdf lastPathComponent];

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *filePath = [documentsDirectory stringByAppendingPathComponent:fileName];

    NSURL *url = [NSURL URLWithString:issue.pdf];
    AFHTTPClient *httpClient = [[[AFHTTPClient alloc] initWithBaseURL:url] autorelease];
    NSURLRequest *request = [httpClient requestWithMethod:@"GET" path:issue.pdf parameters:nil];

    AFURLConnectionOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
operation.outputStream = [NSOutputStream outputStreamToFileAtPath:filePath append:NO];

    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"PDF DOWNLOAD COMPLETE");

        issue.pdf_location = filePath;

        // send out a notification with the issue
        [[NSNotificationCenter defaultCenter] postNotificationName:@"PDF_DOWNLOAD_COMPLETE" object:nil userInfo:[NSDictionary dictionaryWithObject:issue forKey:@"issue"]];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"PDF DOWNLOAD FAILED");

    // send out a notification with the issue
    [[NSNotificationCenter defaultCenter] postNotificationName:@"PDF_DOWNLOAD_FAILED" object:nil userInfo:[NSDictionary dictionaryWithObject:issue forKey:@"issue"]];
    }];

    [operation setDownloadProgressBlock:^(NSInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
        float progress = (float)totalBytesRead / totalBytesExpectedToRead;

        NSLog(@"progress: %f", progress);

        [[NSNotificationCenter defaultCenter] postNotificationName:@"PDF_DOWNLOAD_PROGRESS" object:nil userInfo:[NSDictionary dictionaryWithObjectsAndKeys: issue, @"issue", progress, @"progress", nil]];
    }];

    [_queue addOperation:operation];
}

Answer 1

I previously had a similar experience as you problem. Try to resolve this issue, it took over almost two weeks.

The same problem was with you. So I’m glad to finally meet you 🙂

Here is Solution.

if in downloadProgress block directly update UI, sometimes occur unknown error. because Ambiguous, but i think Main Thread crash. so, downloadProgress Block only update variable, execute timer update UI using a variable.

//At the same time download
myTimer = [NSTimer timerWithTimeInterval:0.1f target:self selector:@selector(updateProgress:) userInfo:nil repeats:YES];
[[NSRunLoop currentRunLoop] addTimer:processTimer forMode:NSRunLoopCommonModes];

[operation setDownloadProgressBlock:^(NSInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead)
{
    //global ivar
    _progress = (float)totalBytesRead / totalBytesExpectedToRead;
}];

- (void)updateProgress:(NSTimer *)timer
{
    myProgressView.progress = _progress;
    if(fabs(1.f-_progress)<0.01f)
    {
        [timer invalidate];
    }
}