Bug 60021 - [MacOS] After PushAsync the page remains empty, but elements react on taps
Summary: [MacOS] After PushAsync the page remains empty, but elements react on taps
Status: ASSIGNED
Alias: None
Product: Forms
Classification: Xamarin
Component: Mac (show other bugs)
Version: 2.4.0
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Rui Marinho
URL:
Depends on:
Blocks:
 
Reported: 2017-10-06 13:57 UTC by Michael Rumpler
Modified: 2017-10-13 12:28 UTC (History)
2 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:


Attachments
Repro project (663.08 KB, application/x-zip-compressed)
2017-10-06 13:57 UTC, Michael Rumpler
Details


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Status:
ASSIGNED

Description Michael Rumpler 2017-10-06 13:57:02 UTC
Created attachment 25169 [details]
Repro project

When I use a NavigationPage as MainPage and try to push another page, then the page is not displayed. But if I know where navigation elements are, I can still tap them and the tap handler is executed.

The sample app displays only a ListView with 5 elements. On tapping of any of the elements, a new page is pushed. Every page displays a new Title. I do see the first page with the ListView when I start the app on the Mac, but when I tap any element, the next page is not shown. The Title is changed accordingly, but the content of the page is white. I can still tap somewhere on the next list elements and it proceeds to the next page. Through the changes of the Title I see that the navigation still does something, but the page remains empty. When I go back to the first page, then I do see that page again.

This works as expected on UWP and iOS. I also left the Android project in. It should work there too, but I didn't test it.

I used XF 2.4.0.282.
Comment 1 Michael Rumpler 2017-10-13 12:28:18 UTC
The problem seems to be related to the Xamarin.Mac version.

When I filed this bug, I was using VS for Mac (Preview) 7.2 build 634 and Xamarin.Mac 3.8.0.49. Now I updated to VS 7.3 build 692 and Xamarin.Mac 4.0.0.84. I'm on the alpha channel.

In one of my apps it works now - without changing anything in the source/dependencies. But the attached repro app still doesn't work.