alert() prompt not visible

bensaccount

In 3.4, alert dialogs have stopped working for me on my iPad, at least in certain circumstances. (I had no issues with this in 3.3)

The app behaves like there is a modal dialog (i.e., it locks up), but the dialog doesn't show up. If I fiddle with the window by swiping up from the bottom bar to shrink it, sometimes the dialog does appear, but I still can't interact with it. If I do that a few times, sometimes it goes away.

Minimal example:

import ui
import dialogs

def quit_selected(sender):
    dialogs.alert("Quit", "Are you sure you want to quit?", "Quit")

view = ui.load_view('MenuUI')
view.present()

Where MenuUI just has a single button that calls quit_selected(). Can't test at the moment whether it only happens with load_view()

Happens regardless of whether it's presented as fullscreen or sheet. Same behavior with input_alert() as well.

However, if I just call alert after the last line, it works fine.

cvp

@bensaccount try

import ui
import dialogs

@ui.in_background
def quit_selected(sender):
    dialogs.alert("Quit", "Are you sure you want to quit?", "Quit")

view = ui.load_view('MenuUI ')
view.present()

bensaccount

@cvp That works, thanks!

Is there any downside to just sticking that decorator on every UI callback that might lead to an alert or a database query? Seems like it would only be a problem if the function blocks the main (non-UI) thread, but that's no worse than blocking the main UI thread.

cvp

@bensaccount There are a lot of topics in this forum where this has been discussed because a lot of people have met the same issue 😀