UIProgressView progress update very slow within AlamoFire (async) call
Inside an AlamoFire get request I'm trying to update my progress bar. Like so: alamofireManager.request(.GET, urlPath, parameters: params).responseJSON{(request,response,JSON,error) in ...<code here>... dispatch_async(dispatch_get_main_queue(), { NSNotificationCenter.defaultCenter().postNotificationName(LoginVCHideSpinnerAndShowProgressBarName as String, object: self) }) ...<more code here>... } For some reasons this takes a few seconds to execute and if I use dispatch_sync instead the app just seems to get stuck at that point but the UI doesn't freeze up (the activity indicator spinner keeps