Why does AFNetworking hangs on first request? - ios

Question

I am completely baffled on this. Each time I test my app in the simulator or on a real device, it hangs for 30,40,60 seconds on this bit of code, but all following request to this API call will load in milliseconds.
I thought it was related to DNS resolving for the first time, so I switched to an IP address for testing and that did not resolve the issue.
If it's the first request after the app starts, it will just hang for a large amount of time, once it has loaded, you can open the view for the same data set or another and it load the list very fast.
Any recommendations?
-(void)getVendorImages {
//Alloc the image list
self.imageList = [[NSMutableArray alloc] init];
// Prepare the request
NSString* vendorImagesApi = [NSString stringWithFormat:#"%#%#",#"http://example.com/api/v1/vendor/images/",self.imageData.vendorId];
NSLog(#"Getting list of images %#",vendorImagesApi);
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager GET:vendorImagesApi
parameters:nil
success:^(AFHTTPRequestOperation *operation, id responseObject) {
// NSLog(#"JSON: %#", responseObject);
//Get images
for (id imageData in responseObject)
{
// prepare image url
NSString* imageUrl = [NSString stringWithFormat:#"%#%#%#",#"http://example.com/images/",imageData[#"id"],#"-650x650.jpg"];
NSLog(#"Putting this in in a list: %#", imageUrl);
[self.imageList addObject:imageUrl];
}
[self.tableView reloadData];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];
}
EDIT:
Here is the thread stack

Answer 1

So after a bunch of digging, I removed all the files for AFNetworking, then installed it all again, including the UIKit+AFNetworking folder, after that I removed all the frameworks and added back UIKit and SystemConfig. Lastly one of my views that loaded at the start of the app had it's own NSURLConnectionDelegate. I removed all that and had it use AFNetworking, and that did the trick. Apparently the first run that was stalling the connection for AFNetworking was because it was likely fighting over who could use the service.