如何检测鼠标左键单击，但在 UI 按钮组件上发生单击时不检测 [英] How to detect left mouse click but not when the click occur on a UI Button component

问题描述

我的脚本使游戏对象在 Input.GetMouseButtonUp(0) 上移动.不幸的是，当我点击 UI Button 时，移动功能被触发导致游戏对象移动.

My script makes a GameObject move on Input.GetMouseButtonUp(0). Unfortunately, when I click on a UI Button, the move function is triggered causing the GameObject to move.

当我按下屏幕上的按钮(UI 元素)时，我不希望我的游戏对象移动.当单击位于 Button 等 UI 组件时，我想阻止 GameObject 移动吗?我该如何补救?另外，我想检查鼠标是否被点击到特定 UI 元素(2 或 3 个按钮)

I do not want my GameObject to move when I press a button on the screen (UI element). I want to prevent GameObject from moving when the click is on a UI component such as Button? How can I remedy this? Also, I'd like to check if the mouse was clicked over specific UI elements (2 or 3 buttons)

推荐答案

阅读您的评论后.您需要的是 EventSystem.current.IsPointerOverGameObject() 它检查指针是否结束了 UI.true 当指针在 UI 上时，否则 false.您可以将其与 '!' 一起使用，并且仅当鼠标不在 UI 上方时才运行您的旋转代码.

After reading your comment. What you need is EventSystem.current.IsPointerOverGameObject() which checks if pointer is over UI. true when pointer is over UI, otherwise false. You can use it with '!' and run your rotation code only if the mouse is not over the UI.

桌面版

if(Input.GetMouseButtonUp(0) && !EventSystem.current.IsPointerOverGameObject())
{
    //Your code here
}

//移动端

if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Ended && !EventSystem.current.IsPointerOverGameObject(Input.GetTouch(0).fingerId))
{
    //Your code here
}   

上面的解决方案应该可以工作，但是有一个错误.当鼠标按钮在 UI Button 上按下然后在 UI Button 之外释放时，它将注册为点击.因此，基本上，该解决方案仅在您单击 UI Button 并在 UI Button 上释放时才有效.如果你在U Button外面释放，原来的问题又会回来.

The solution above should work but there is a bug. When the mouse button is pressed over the UI Button then released outside of the UI Button, it will register as a click. So, basically, the solution works only when you click on UI Button and release on UI Button. If you release outside the U Button, the original problem will be back again.

最好的解决方案是使用一个临时的 boolean 值，并使用 Input.GetMouseButtonDown 检查按钮最初是否在 UI 上被按下.保存的 boolean，然后您可以在 Button 使用 Input.GetMouseButtonUp(0) 释放时使用.下面的解决方案适用于移动设备和桌面设备.移动测试，它的工作原理.

The best solution is to use a temporary boolean value and check if button was originally pressed on a UI with Input.GetMouseButtonDown. That saved boolean, you can then use when the Button is released with Input.GetMouseButtonUp(0). The solution below is provided to work with both Mobile and Desktop. Mobile tested and it works.

bool validInput = true;

private void Update()
{
    validateInput();

    #if UNITY_STANDALONE || UNITY_EDITOR

    //DESKTOP COMPUTERS
    if (Input.GetMouseButtonUp(0) && validInput)
    {
        //Put your code here
        Debug.Log("Valid Input");
    }
    #else

    //MOBILE DEVICES
    if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Ended && validInput)
    {
        //Put your code here
        Debug.Log("Valid Input");
    }
    #endif
}

void validateInput()
{
    #if UNITY_STANDALONE || UNITY_EDITOR
    //DESKTOP COMPUTERS
    if (Input.GetMouseButtonDown(0))
    {
        if (EventSystem.current.IsPointerOverGameObject())
            validInput = false;
        else
            validInput = true;
    }
    #else
    //MOBILE DEVICES
    if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began)
    {
        if (EventSystem.current.IsPointerOverGameObject(Input.GetTouch(0).fingerId))
            validInput = false;
        else
            validInput = true;
    }
    #endif
}

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