How to get download progress with AFHTTPSessionManager in AFNetworking 3.0 - ios

Question

When I use AFNetworking 2, I could get progress with AFHTTPRequestOperation like this:
NSURLRequest *urlRequest = [[NSURLRequest alloc] initWithURL:aURL cachePolicy:NSURLRequestReturnCacheDataElseLoad timeoutInterval:_timeoutInterval];
AFHTTPRequestOperation *imageRequestOperation = [[AFHTTPRequestOperation alloc] initWithRequest:urlRequest];
imageRequestOperation.responseSerializer = [AFImageResponseSerializer serializer];
__weak AFHTTPRequestOperation *imageRequestOperationForBlock = imageRequestOperation;
[imageRequestOperation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
// ...
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
// ...
}];
[imageRequestOperation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
if (progress) {
progress((float)totalBytesRead / totalBytesExpectedToRead);
}
}];
I use AFHTTPSessionManager GET:parameters:success:failure: to get data, but I don't know how to get download progress in AFNetworking 3.0.

Answer 1

Link in comments was missleading (NSURLSessionDownloadTask). Sorry about that.
Code below should work though.
Assumption: this code is placed in AFHTTPSessionManager subclass with an NSURLSessionDataTask *testTask ivar declared. It should be easy enough modify as needed.
Vital part of code taken from this answer
- (void)test
{
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:#"http://eoimages.gsfc.nasa.gov/images/imagerecords/78000/78797/nwpassage_tmo_2012199_lrg.jpg"]];
testTask = [self dataTaskWithRequest:request
completionHandler:^(NSURLResponse * __unused response, id responseObject, NSError *error) {
if (error)
{
//...
NSLog(#"error");
}
else
{
//...
UIImage *result = responseObject;
NSLog(#"Success: %#",NSStringFromCGSize(result.size));
}
}];
[self setDataTaskDidReceiveDataBlock:^(NSURLSession *session,
NSURLSessionDataTask *dataTask,
NSData *data)
{
if (dataTask.countOfBytesExpectedToReceive == NSURLSessionTransferSizeUnknown)
return;
if (dataTask != testTask)
return;
NSUInteger code = [(NSHTTPURLResponse *)dataTask.response statusCode];
if (!(code> 199 && code < 400))
return;
long long bytesReceived = [dataTask countOfBytesReceived];
long long bytesTotal = [dataTask countOfBytesExpectedToReceive];
NSLog(#"... %lld/%lld",
bytesReceived,
bytesTotal);
}];
[testTask resume];
}