How to restore the last window size on Mac Catalyst

Question

Created Aug ’20

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I noticed that sometimes, when opening my Mac Catalyst app, the window is not resized to the size I left it the last time.

Should I restore it manually when launching the app, or is the system responsible for it? And if it so, why it doesn't work sometimes?

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Answer 1

Frameworks Engineer OP

Apple

Sep ’21

The OS generally takes care of this for you. If your app is a single-scene app, the window frame is always restored on launch. Alternatively, if your app has opted into UIApplicationSupportsMultipleScenes, the window restoration behavior follows the setting under System Preferences -> General -> Close windows when quitting an app. In this case, Cmd-Opt-Q will invert the behavior. If all windows were closed as a part of app termination (or if no windows existed at termination), a single new UIWindowScene is created when the app is next launched.

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Answer 2

Mr. Jefferson OP

3w

Similar question, but specific to restoring window size and position after closing using the red stoplight button: https://developer.apple.com/forums/thread/767546

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