检查鼠标是否点击了具有特定名称或标签的 UI 元素? [英] Check if mouse clicked on a UI element with a specific name or tag?

问题描述

EventSystem.current.IsPointerOverGameObject() 检查鼠标是否在任何 UI 元素上单击.如何检查鼠标是否点击了具有特定名称或标签的 UI 元素?

EventSystem.current.IsPointerOverGameObject() checks if the mouse was clicked over any UI element. How can I check if the mouse clicked on a UI element with a specific name or tag?

下面的脚本使游戏对象在 Input.GetMouseButtonUp(0) 上移动.当我单击文本"等 UI 元素时，不会触发移动功能，导致游戏对象不移动.那挺好的.这里的问题是我不能考虑哪些 UI 元素.例如，我想要的是:如果用户单击带有不阻止移动脚本"标签的 UI 元素，则移动开始.但是，如果用户点击带有阻止移动脚本"标签的 UI 元素，则不会调用移动.

The script below makes a GameObject move on Input.GetMouseButtonUp(0). When I click on a UI element such as "Text", the move function is not triggered causing the GameObject not to move. That's good. The problem here is I cannot which UI elements are taken into consideration. For example, what I want is: if the user clicks on a UI element with tag "don't block movement script", the movement start. But, if the user clicks on a UI element with tag "block movement script", the movement won't be called.

看，我的屏幕充满了不可见"的 UI 元素(颜色 A = 0).它们是隐形的，因此我可以在需要时激活和停用它们.问题:当我触摸或点击屏幕时，我的移动代码没有被调用，因为我点击了一个不可见的 UI 元素.这就是为什么我想检查鼠标是否在特定 UI 元素(可见元素)上单击.此处，可见的 UI 元素称为 button1 和 button2.

Look, my screen is full of "invisible" UI elements (color A = 0). They're invisible so I can activate and deactivate them when I want to. The problem: when I touch or click the screen, my moving code is not called because I've clicked an invisible UI element. That's why I want to check if the mouse was clicked over specific UI elements (the visible ones). Here, the visible UI elements are called button1 and button2.

点击按钮时的作用:

using UnityEngine;
using UnityEngine.UI;

public class ButtonChecker: MonoBehaviour
{
    public Button button1;
    public Button button2;

    void OnEnable()
    {
        //Register Button Events
        button1.onClick.AddListener(() => buttonCallBack(button1));
        button2.onClick.AddListener(() => buttonCallBack(button2));
    }

    private void buttonCallBack(Button buttonPressed)
    {
        if (buttonPressed == button1)
        {
            Application.LoadLevel ("Example Scene 1");w
        }

        if (buttonPressed == button2)
        {
            Application.LoadLevel ("Example Scene 2");
        }
    }

    void OnDisable()
    {
        //Un-Register Button Events
        button1.onClick.RemoveAllListeners();
        button2.onClick.RemoveAllListeners();
    }
}

移动代码(同时检查是否点击 UI 元素):

Movement code (while checking if click on UI element):

using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;

public class MovementCode : MonoBehaviour {

    bool validInput = true;

    void Update ()
    {
        validateInput();

        if (Input.GetMouseButtonUp (0) && validInput)
        {
            transform.position += new Vector3 (0.08f, 0, 0);
        }

        if (Input.touchCount > 0 && Input.GetTouch (0).phase == TouchPhase.Ended && validInput)
        {
            transform.position += new Vector3 (0.08f, 0, 0);
        }
    }

    void validateInput()
    {

        if (Input.GetMouseButtonDown(0))
        {
            if (EventSystem.current.IsPointerOverGameObject())
                validInput = false;
            else
                validInput = true;
        }

        if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began)
        {
        if (EventSystem.current.IsPointerOverGameObject(Input.GetTouch(0).fingerId))
        validInput = false;
        else
        validInput = true;
        }
    }
}

推荐答案

您的问题有两种解决方案.

You have two solutions to your problem.

1.不要通过使 alpha 0 隐藏 UI 元素，而是使用 gameObject.SetActive(false); 在按钮游戏对象上.这应该可以解决您的问题，因为事件对禁用的游戏对象不起作用.

1.Instead of hiding the UI element by making the alpha 0, use gameObject.SetActive(false); on the Button GameObject. This should solve your problem because event will not work on a disabled GameObject.

2.另一种解决方案是使用EventSystem.current.currentSelectedGameObject.CompareTag来检查UI属于哪个标签，然后根据在那.将它添加到您的 validateInput() 函数中.

2.Another solution is to use EventSystem.current.currentSelectedGameObject.CompareTag to check which tag the UI belongs to then do something based on that. Add it to your validateInput() function.

创建可见和不可见的标签.更改您的 Buttons 以拥有这些 tags.然后将 MovementCode 脚本中的 validateInput() 函数替换为以下代码:

Create a visible and invisible tags. Change your Buttons to have these tags. Then replace the validateInput() function from the MovementCode script with the code below:

void validateInput()
{

    if (Input.GetMouseButtonDown(0))
    {
        if (EventSystem.current.IsPointerOverGameObject() && EventSystem.current.currentSelectedGameObject.CompareTag("invisible"))
            validInput = true;
        else if (EventSystem.current.IsPointerOverGameObject())
            validInput = false;
        else
            validInput = true;
    }

    if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began)
    {
        if (EventSystem.current.IsPointerOverGameObject(Input.GetTouch(0).fingerId) && EventSystem.current.currentSelectedGameObject.CompareTag("invisible"))
            validInput = true;
        else if (EventSystem.current.IsPointerOverGameObject())
            validInput = false;
        else
            validInput = true;
    }
}

上面的代码将使不可见的Buttons 不会阻止移动.

The code above will make the invisible Buttons not block the movement.

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