/MauiWindowBug

Example repo for reproducing a dotnet Maui exception

Primary LanguageCSS

MAUI Window Bug Repro

How to reproduce

  1. Open the software and click the "Open Second Window" button.
  2. Stop debugging to simulate a crash (this same issue also happens if the app crashes).
  3. Open the software again and you will get the exception.

Workaround for development only

To fix this in while developing (in the IDE, this can't be done at runtime to my knowledge):

  1. Remove the following from the Platforms/MacCatalyst/Info.plist file

     <key>UIApplicationSceneManifest</key>
 <dict>
     <key>UIApplicationSupportsMultipleScenes</key>
     <true/>
     <key>UISceneConfigurations</key>
     <dict>
         <key>UIWindowSceneSessionRoleApplication</key>
         <array>
             <dict>
                 <key>UISceneConfigurationName</key>
                 <string>__MAUI_DEFAULT_SCENE_CONFIGURATION__</string>
                 <key>UISceneDelegateClassName</key>
                 <string>SceneDelegate</string>
             </dict>
         </array>
     </dict>
 </dict>

  2. Clean and Rebuild the software and debug it (a window probably won't open)

  3. Stop debugging

  4. Debug it again.

  5. Stop debugging.

  6. Add those lines back to the Info.plist file.

  7. Clean and Rebuild

  8. Debug again (the software should open again)