UNITY - 如何为长按和单击/双击执行不同的操作？

Posted 2021-04-10

所以我正在制作一个2D角色控制器，如果按住鼠标（长按），玩家可以设置他想要发射射弹的方向，当射弹被射击并与物体相撞时，玩家可以点击一次（或双击，如果它更好）将角色的位置交换到射弹的位置。我正在尝试使用Input.onMouseButton和Input.onMouseButtonDown来做，但我无法弄明白。谢谢大家帮助我！

答案

长按一下，您只需要测量自第一次点击以来经过的时间量。这是一个例子：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;

public class LongClick : MonoBehaviour
{
    public float ClickDuration = 2;
    public UnityEvent OnLongClick;

    bool clicking = false;
    float totalDownTime = 0;


    // Update is called once per frame
    void Update()
    {
        // Detect the first click
        if (Input.GetMouseButtonDown(0))
        {
            totalDownTime = 0;
            clicking = true;
        }

        // If a first click detected, and still clicking,
        // measure the total click time, and fire an event
        // if we exceed the duration specified
        if (clicking && Input.GetMouseButton(0))
        {
            totalDownTime += Time.deltaTime;

            if (totalDownTime >= ClickDuration)
            {
                Debug.Log("Long click");
                clicking = false;
                OnLongClick.Invoke();
            }
        }

        // If a first click detected, and we release before the
        // duraction, do nothing, just cancel the click
        if (clicking && Input.GetMouseButtonUp(0))
        {
            clicking = false;
        }
    }
}

对于双击，您只需要检查在指定（短）间隔内是否发生第二次单击：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;

public class DoubleClick : MonoBehaviour
{
    public float DoubleClickInterval = 0.5f;
    public UnityEvent OnDoubleClick;

    float secondClickTimeout = -1;

    void Update()
    {

        if (Input.GetMouseButtonDown(0))
        {
            if (secondClickTimeout < 0)
            {
                // This is the first click, calculate the timeout
                secondClickTimeout = Time.time + DoubleClickInterval;
            }
            else
            {
                // This is the second click, is it within the interval 
                if (Time.time < secondClickTimeout)
                {
                    Debug.Log("Double click!");

                    // Invoke the event
                    OnDoubleClick.Invoke();

                    // Reset the timeout
                    secondClickTimeout = -1;
                }
            }

        }

        // If we wait too long for a second click, just cancel the double click
        if (secondClickTimeout > 0 && Time.time >= secondClickTimeout)
        {
            secondClickTimeout = -1;
        }

    }
}

另一答案

据我所知，从文档和论坛中，你需要检查使用Input.GetMouseButtonDown以及自第一次按下以来的时间，例如so。

另一答案

除了使用按钮获取GetMouseButtonDown（int）之外，您还要跟踪记住检查哪个阶段是按钮。

TouchPhase