Unity3D:如何检测按下和释放按钮的时间 [英] Unity3D: How to detect when a button is being held down and released

问题描述

我有一个UI按钮.我想在用户按下按钮时显示文本，而在用户释放按钮时隐藏文本.

I have a UI button. I want to show a text when the user is pressing the button and hide the text when the user releases the button.

我该怎么做?

推荐答案

您必须通过扩展Button类并重写方法OnPoiterDown和OnPointerUp来创建自己的自定义按钮.将MyButton组件而不是Button附加到游戏对象上

You have to create your own custom button by extending Button class and override method OnPoiterDown and OnPointerUp. Attach MyButton component instead of Button to your gameobject

using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class MyButton : Button
{

    public override void OnPointerDown(PointerEventData eventData)
    {
        base.OnPointerDown(eventData);
        Debug.Log("Down");
        //show text
    }

    public override void OnPointerUp(PointerEventData eventData)
    {
        base.OnPointerUp(eventData);
        Debug.Log("Up");
        //hide text
    }
}

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