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Hello,

I have a background task which looks for an event, but this should only happen while one view is open.

Is there a way to determine if a certain view is closed?

you could setup a custom view and overwrite the will_close method, maybe you also like to know when the view is fully loaded...

I have copied the appropiate code from the docs http://omz-software.com/pythonista/docs/ios/ui.html for you

import ui

class MyView (ui.View):
    def did_load(self):
        # This will be called when a view has been fully loaded from a UI file.
        pass

    def will_close(self):
        # This will be called when a presented view is about to be dismissed.
        # You might want to save data here.
        pass

For background threads, check your view.on_screen in your thread's callback.

@JonB thanks, that’s what I was searching for.

By the way, if you are just trying to pause something until the view closes, you would use wait_modal instead.