One of the most common ways to provide a window size in visionOS is to use the defaultSize scene modifier.
WindowGroup(id: "someID") {
SomeView()
}
.defaultSize(CGSize(width: 600, height: 600))
Starting in visionOS 26, using this has a side effect. visionOS 26 will restore windows that have been locked in place or snapped to surfaces. If a user has manually adjusted the size of a locked/snapped window, the users size is only restore in some cases.
Manual resize respected
- Leaving a room and returning later
- Taking the headset off and putting it back on later
Manual resize NOT respected
- Device restart. In this case, the window is reopened where it was locked, but the size is set back to the values passed to
defaultSize. The manual resizing adjustments the user has made are lost. This is counter to how all other windows and widgets work.
I reported this last month (FB18429638), but haven't heard back if this is a bug or intended behavior.
Questions
- What is the best way to provide a default window size that will only be used when opening new windows–and not used during scene restoration?
- Should we try to keep track of window size after users adjust them and save that somewhere?
- If this is intended behavior, can someone please update the docs accordingly?
