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Graphic.CrossFadeAlpha

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public void CrossFadeAlpha(float alpha, float duration, bool ignoreTimeScale);

Parameters

alphaTarget alpha.
durationDuration of the tween in seconds.
ignoreTimeScaleShould ignore Time.scale?

Description

Tweens the alpha of the CanvasRenderer color associated with this Graphic.

Creates a fading effect on a Graphic with a CanvasRenderer attached. Choose an alpha level to fade to, and pick the speed of the fade to see a smooth fade over time. UI Images and Text are some of the elements that you are able to apply this effect to.

//Attach this script to a GameObject
//Create an Image GameObject by going to Create>UI>Image. Attach this Image to the Image field in your GameObject’s Inspector window.
//This script creates a toggle that fades an Image in and out.
using UnityEngine;
using UnityEngine.UI;

public class Example : MonoBehaviour { //Attach an Image you want to fade in the GameObject's Inspector public Image m_Image; //Use this to tell if the toggle returns true or false bool m_Fading;

void Update() { //If the toggle returns true, fade in the Image if (m_Fading == true) { //Fully fade in Image (1) with the duration of 2 m_Image.CrossFadeAlpha(1, 2.0f, false); } //If the toggle is false, fade out to nothing (0) the Image with a duration of 2 if (m_Fading == false) { m_Image.CrossFadeAlpha(0, 2.0f, false); } }

void OnGUI() { //Fetch the Toggle's state m_Fading = GUI.Toggle(new Rect(0, 0, 100, 30), m_Fading, "Fade In/Out"); } }

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