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Created attachment 18301 [details]
Sample Xamarin Forms Bug Demo App
I have noticed some Xamarin iOS WebView rendering problems after upgrading to iOS 10.
Basically after returning back to the app after screen has been locked and then unlocked causes web view content to freeze. After returning to the app, the user cannot scroll or tap the items on the web view for the most items. The sample attached app uses BBC web site, for this web site, the upper part works more or less fine, the bottom doesn't. But for our internal web site, everything is frozen on iOS 10.
I have reproduced the behaviour only on iOS 10 and cannot reproduce it on the previous iOS version (tested on 9.3.5) or any version on the simulator.
I have attached the sample app that demonstrates the problem.
- compile the app
- run the app
- press Load page and wait till the web site loads
- lock the device
- unlock the device
- on iOS 10 you should observe unresponsive layout
- on iOS 9.3.5 the web site should work fine
- OS: macOS 10.12.1
- Xamarin Studio: 6.1.1 (build 17)
- Xamarin Forms: 18.104.22.168
- Device: iOS 10.1.1
I have created a very similar native iOS app and cannot reproduce the problem.
I could not duplicate your issue with 2.3.3.-pre3. Can you update to the latest and try again?
I have just retested using Xamarin Forms 22.214.171.124-pre3 and it doesn't work as well.
The test was performed on iPad Air 2 and iPad Pro 9.7 both in landscape mode and both running the latest iOS version.
After unlocking the screen, the lower part of the web page (below "News" headline) doesn't react on scrolling and touches.
Ah. Unfortunately, I don't have an iPad, so I will let Xamarin team test this one.
I was seemingly only able to reproduce the issue once with the version in the reproduction; I've tried a few times with the latest nightly and can't seem to get it to happen yet on the 10.2 simulator. I don't want to discount the possibility that something is going on so I'm going to set the status of this to needinfo for the time being. Let me know if the newer versions are still posing you any trouble.
As it was commented, the issue is reproducible mostly on physical device not simulator.
We are no longer assuming that this is an issue as it has not been reported by anyone else over the course of a few months. If you're experiencing the issue on the latest prerelease or nightly build, please reopen this with an updated reproduction.