Unity - 帮助需要触摸并按住 UI 按钮来调用更新方法和自动触发（这里是脚本）

Question

我是一个没有编码经验的新手，刚开始使用unity我正在关注brackeys Ray cast拍摄视频，https://youtu.be/THnivyG0Mvo，我创建了枪脚本但我想转它进入移动设备，所以我想通过按住 UI 按钮来自动射击。 plz，我需要帮助我知道没有代码。这是我的代码。我在想有没有办法用一些东西代替 input.getbutton 来制作一个在按住时自动触发的按钮。谢谢，抱歉，如果这是一个愚蠢的问题

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.VisualScripting;
public class Gun : MonoBehaviour
{
public float damage = 10f;
public float range = 100f;
public float fireRate = 15f;
public float impactForce = 30f;

public Camera fpsCam;
public ParticleSystem muzzleFlash;
public GameObject impactEffect;
private float nextTimeToFire = 0f;
// Update is called once per frame
public void Update()
   {
    if (Input.GetButton("Fire1") && Time.time >= nextTimeToFire)
    {
        nextTimeToFire = Time.time + 1f / fireRate;
        Shoot();
    }
  }
  public void Shoot()
  {
    muzzleFlash.Play();
    RaycastHit hit;
    if (Physics.Raycast(fpsCam.transform.position, fpsCam.transform.forward, out hit, 
        range))
    {
     
        Enemy enemy = hit.transform.GetComponent<Enemy>();
        if (enemy != null)
        {
            enemy.TakeDamage(damage);
        }
        if (hit.rigidbody != null)
        {
            hit.rigidbody.AddForce(-hit.normal * impactForce);
        }
        GameObject impactGO = Instantiate(impactEffect, hit.point, 
      Quaternion.LookRotation(hit.normal));
        Destroy(impactGO, 2f);  
    }
  }
}

Answer 1

创建一个按钮，并向其添加一个新脚本。该脚本将负责处理按钮状态。基本上我们需要做的是.. 当 OnPointerDown 发生时，设置一个值以指示按钮被按住。当 OnPointerUp 发生时，重置该值。

using UnityEngine;
using UnityEngine.EventSystems;

public class ClickAndHoldButton : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IPointerEnterHandler
{
    public bool IsHeldDown => isHeldDown;
    private bool isHeldDown;

    public void OnPointerDown(PointerEventData eventData)
    {
        isHeldDown = true;
    }
    public void OnPointerUp(PointerEventData eventData)
    {
        isHeldDown = false;
    }
    public void OnPointerEnter(PointerEventData eventData)
    {
    
    }
}

然后在你的枪的更新中，你会检查按钮状态，看看它是否被按住。

public ClickAndHoldButton mobileFireButton;

void Update()
{
    if (Time.time >= nextTimeToFire && (
        Input.GetButton("Fire1") ||
        mobileFireButton.IsHeldDown))
    {
        nextTimeToFire = Time.time + 1f / fireRate;
        Shoot();
    }
}

Unity - 帮助需要触摸并按住 UI 按钮来调用更新方法和自动触发（这里是脚本）

Unity - help needed to touch and hold UI button to call update method and auto fire (here is the script)

c#

unity3d