Flashing/Blinking GUI

Questions & Answers
1

Hey guys,
I was just wondering if anyone knew how to write a script that you could attach to a gui texture to make it blink or flash on and off continuously.
Thanks so much,
Johnny :smiley:

2

since OnGUI function is a function that is being called by the engine just like the Update function. this must be something easy to acheive.

Try this:

private var blink = false;
private var counter:int = 0;
private var blinkSpeed:int = 10;
public var yourGUITexture:GUITexture;

function Update()
{
    if(counter == blinkSpeed)
    {
        blink = true;
        counter = 0;
    } 
    else
    	blink = false;
    
    counter++;
}

function OnGUI()
{
     if(blink)
        yourGUITexture.guiTexture.enabled = true;
     else 
        yourGUITexture.guiTexture.enabled = false;
}

Now attach this script to an empty game object(or whatever) in your scene, and drag you
GUITexture to add to the public var “yourGUITexture”.
I just tried , working :slight_smile:

3

Ok sure,
Sorry. I’m new to these forums and I don’t have much experience.Thanks again though for your help.

4

You can use the Coroutines and new Unity 4.6 GUI to achieve this very easily. Check this article here

Blinking Text - TGC

If you just need the code, here you go

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

public class FlashingTextScript : MonoBehaviour {

 Text flashingText;

 void Start(){
  //get the Text component
  flashingText = GetComponent<Text>();
  //Call coroutine BlinkText on Start
  StartCoroutine(BlinkText());
 }
 
 //function to blink the text 
 public IEnumerator BlinkText(){
  //blink it forever. You can set a terminating condition depending upon your requirement
  while(true){
   //set the Text's text to blank
   flashingText.text= "";
   //display blank text for 0.5 seconds
   yield return new WaitForSeconds(.5f);
   //display “I AM FLASHING TEXT” for the next 0.5 seconds
   flashingText.text= "I AM FLASHING TEXT!";
   yield return new WaitForSeconds(.5f);
  }
 }
 
}

P.S: Even though it seems to be an infinite loop which is generally considered as a bad programming practice, in this case it works quite well as the MonoBehaviour will be destroyed once the object is destroyed. Also, if you dont need it to flash forever, you can add a terminating condition based on your requirements.