Run a function aslong as a button is pressed

Question

Hi

I have a button in my canvas. I know how to make a button run a function whenever its pressed, but how do I make it run the function as long as I hold the button down.

To be more clear i'll give you an example :

I have a bool that needs to be turned on and off ( on when the button is pressed, and off if its not pressed)

e.g. :

public void WhileButtonIsPressed(){ myBool = true;

}

public void WhileButtonIsNotPressed(){ myBool = false;

}

long story short : I want my bool to be true if the button is held down, and false if its not.

Thanks in advance.

Answer 1

Answer by sonu124 · Sep 17, 2015 at 12:14 PM

this code will work..

using UnityEngine; using System.Collections; using UnityEngine.EventSystems;

public class ButtonPressed : MonoBehaviour, IPointerDownHandler, IPointerUpHandler {

 // Use this for initialization
 void Start () {
 
 }
 void Update()
 {
     if (!ispressed)
         return;
     // DO SOMETHING HERE
     Debug.Log ("Pressed");

 }
 bool ispressed = false;
 public void OnPointerDown(PointerEventData eventData)
 {
     ispressed = true;
 }
 
 public void OnPointerUp(PointerEventData eventData)
 {
     ispressed = false;
 }

}

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Gumemura · Feb 07, 2020 at 07:00 AM 0

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Works like a charm. Thnks very much!

YehiOr · Dec 01, 2021 at 05:57 AM 0

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Hi, Excuse me, I'm new to unity. How do I use this code? I can't seem to select the OnPointerDown function on the UI button's On Click () options.

sacredgeometry YehiOr · Dec 01, 2021 at 06:38 AM 0

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HI there, welcome:

The GUI api has changed a lot in the last 6 years

https://docs.unity3d.com/2019.1/Documentation/ScriptReference/UI.Selectable.OnPointerDown.html

The documentation says that you need to implement the IPointerDownHandler interface which will be part of what you need to do. Suffice to say you probably want to look at more modern solutions to your problem or ask a new question instead of digging up 6 year old+ posts.

Answer 2

Answer by Hiten2012 · Jul 04, 2015 at 01:43 PM

Its possible by many different ways but choose any suitable for your case. For UI button than you can refer this http://answers.unity3d.com/questions/857801/46-ui-dynamic-button-event-system-pointerenter-poi.html

If UI it not mandatory in your case You can also do it with GUI button than use Repeat Button http://docs.unity3d.com/ScriptReference/GUI.RepeatButton.html

In case of touch device input http://docs.unity3d.com/ScriptReference/TouchPhase.html

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Answer 3

Answer by holliebuckets · Sep 16, 2015 at 10:30 PM

@Gilles_aerts This thread is a great resource too! ---> http://forum.unity3d.com/threads/touch-and-hold-a-button-on-new-ui.266065/

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Run a function aslong as a button is pressed

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