Legacy Documentation: Version 2018.2 (Go to current version)
LanguageEnglish
  • C#

Graphic.CrossFadeAlpha

Suggest a change

Success!

Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.

Close

Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.

Close

Cancel

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"); } }
对文档有任何疑问,请移步至开发者社区提问,我们将尽快为您解答