Progress Not Updated - Swift

Question

I am working on a ProgressView in Swift

Here is my code

 var request = HTTPTask() let downloadTask = request.download(urlm!, parameters: nil, progress: {(complete: Double) in println("percent complete: \(Float(complete))") self.Progress.setProgress(Float(complete), animated: true) 

Even if complete gives this conclusion

 percent complete: 0.00480848 percent complete: 0.0089619 percent complete: 0.0132512 percent complete: 0.0175405 percent complete: 0.0221036 percent complete: 0.0264841 percent complete: 0.0308647 percent complete: 0.0350627 percent complete: 0.0392608 percent complete: 0.0434588 percent complete: 0.0513073 percent complete: 0.0555054 percent complete: 0.0598859 percent complete: 0.0642665 percent complete: 0.0688296 percent complete: 0.0731189 percent complete: 0.0774994 percent complete: 0.0817887 percent complete: 0.0861693 percent complete: 0.0908237 percent complete: 0.095478 percent complete: 0.099676 percent complete: 0.104057 percent complete: 0.109624 percent complete: 0.114278 percent complete: 0.119024 percent complete: 0.123404 percent complete: 0.127602 percent complete: 0.131983 percent complete: 0.136181 percent complete: 0.136408 percent complete: 0.140561 percent complete: 0.144759 percent complete: 0.148957 percent complete: 0.153155 percent complete: 0.157901 percent complete: 0.162282 percent complete: 0.166662 percent complete: 0.171043 percent complete: 0.175241 percent complete: 0.175468 percent complete: 0.179621 percent complete: 0.184002 percent complete: 0.188291 percent complete: 0.192672 percent complete: 0.197052 percent complete: 0.201524 percent complete: 0.205905 percent complete: 0.210285 percent complete: 0.21494 percent complete: 0.215258 ... percent complete: 1.0 

It does not update the view of progress here.

 self.Progress.setProgress(Float(complete), animated: true) 

Answer 1

Updated for Swift 3

Changes in the user interface should always occur in the main / foreground thread, in which case it happens in the background. Using:

 DispatchQueue.main.async { self.Progress.setProgress(Float(complete), animated: true) } 

to move it to the fore.

Old answer for pre-Swift 3

Changes in the user interface should always occur in the main / foreground thread, in which case it happens in the background. Using:

 dispatch_async(dispatch_get_main_queue()) { self.Progress.setProgress(Float(complete), animated: true) } 

to move it to the fore.