Screen flicker when setting a maskView on UIVisualEffectView
| Originator: | |||
| Number: | rdar://18466755 | Date Originated: | 26.09.2014 |
| Status: | Open | Resolved: | |
| Product: | iOS | Product Version: | 8.0 |
| Classification: | Reproducible: | Always |
Summary: When I set a maskView on a UIVisualEffectView instance, which has a blur effect, it renders at the moment of setting the maskView on-screen with a scale transformation. If there are other expensive operations on main queue, this effect is more drastically visible. The latter thing shouldn't happen at all, but is perhaps a helpful information for problem discovery. Steps to Reproduce: See the Example App (https://github.com/mrackwitz/Radar18466755) 1. Run the app on one of the specified devices. 2. Press on the button "Flicker!" 3. See what happens. Expected Results: Whole window remains at the same size. Actual Results: Whole window is scaled by a positive factor for a moment and then the scaling is reverted. Configuration: iPhone 6, iPhone 6 Simulator, iPhone 6P Simulator, iPhone 6P (not tested) This bug is specific to the "classic" resolution (involving UIClassicWindow) on iPhone 6 / iPhone 6P.
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