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So I have a UIProgressView which animates for 3 seconds but it seems that the opacity of the bar at the start, is much lower than at the end. The bar seems to become more opaque as it loads. I have attached some screenshots to show what I mean but I simply can't work out why this is. Is it a characteristic of the loading bar or is it an Xcode bug? Don't think there's anything wrong with the code as it's pretty simple really:

UIView.animateWithDuration(3, animations: { () -> Void in
            self.progressView.setProgress(1.0, animated: true)
        })

Anyway here are the screenshots to better demonstrate the issue: enter image description here enter image description here enter image description here

dwinnbrown
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