button.OnClick listener triggers twice

Question

My play button in scene changes the current menu scene to the actual level scene.

I added the listener method in the form of a delegate:

playLevel.onClick.AddListener(delegate { LoadLevel();})

Most of the times it works perfectly fine, but sometimes when I click the button the game lags for a second and the button can be clicked again therefore opening the Level scene twice.

Does anyone have any idea on how to prevent this from happening? Thanks

@Style-7 I tried to make them both disabled and not interactable but it did not work: playLevel.onClick.AddListener(delegate { LoadLevel(); playLevel.enabled = false; playLevel.interactable = false;}). — Victor, Oct 13 '20 at 15:34
It may be looks like enable (need redraw) but button will disable and user can not press twice — Style-7, Oct 13 '20 at 15:44
add in manifest for activity android:launchMode="singleTask" — Style-7, Oct 13 '20 at 16:35

Berk Askin · Answer 1 · 2020-10-13T18:34:00.687

Sometimes:) ? Looks like your button have a multiple listeners with same method. Maybe this just happens you're click same button more than a one time in same game session.

Your Code: playLevel.onClick.AddListener(delegate { LoadLevel();})

This code delegates your method block for a listener when you clicks EVERYTIME. I think just try playLevel.onClick.RemoveAllListeners() or just remove a specific one (if you dont want remove all) with use playLevel.onClick.RemoveListener(-your actionCall-) before delegates a new one.

button.OnClick listener triggers twice

1 Answers1