ios - Progress view is not updating - Swift -

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i working on progressview in swift

here's 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 though complete gives output

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 doesn't update progress view here 

self.progress.setprogress(float(complete), animated: true)

updated swift 3

changes ui should occur on main/foreground thread, in case it's happening on background queue. use:

dispatchqueue.main.async {     self.progress.setprogress(float(complete), animated: true) }

to move foreground.

old answer pre-swift 3

changes ui should occur on main/foreground thread, in case it's happening on background queue. use:

dispatch_async(dispatch_get_main_queue()) {     self.progress.setprogress(float(complete), animated: true) }

to move foreground.


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