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Created attachment 24275 [details]
Solution with storyboard
Message "Custom components are not being rendered because problems were detected" appears after loading storyboard. Also, some views are not being displayed correctly. Attaching solution code sample.
I'm pretty sure this is just the user code doing something which doesn't work at design time.
iOS folks, does this mean anything to you? https://gist.github.com/iherrera/97f743fcca76810df68ce21396a4f685#file-gistfile1-txt-L491-L540
My guess is that the correct thing to do is make the control design-time aware and avoid doing asynchronous operation that crash: https://developer.xamarin.com/guides/ios/user_interface/designer/ios_designable_controls_overview/#Design_Mode
You're correct, the control is doing something it shouldn't do in design mode (capturing audio/video (with AVCaptureSession)).
Designer also takes an eternity to load the storyboard file when latest XI is installed
I'm not getting the error you are seeing, but I think I am seeing some views not showing up properly.
Let me know if I am missing anything.
There are 4 screens, the first is a NagigationViewController which shows up correctly afaict.
The second is a camera view with a "Resume" button init. The problem in VS4M is that it has a white bg instead of black like Xcode shows it (not sure if this is a bug or just a stylistic difference).
The third controller should have a Play and Pause button in the lower left corner according to Xcode, but they do not show up in VS4M.
The forth controller should have a square cell in the upper left corner according to Xcode, but it also does not appear in VS4M.
n/m, I guess Alan figured it out