点击屏幕，关闭弹框

最新推荐文章于 2021-05-26 11:37:50 发布

原创最新推荐文章于 2021-05-26 11:37:50 发布 · 535 阅读

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本文介绍了一个在Unity中实现的UI面板自动关闭机制。该机制通过检测鼠标或触摸屏点击位置是否在面板外部来判断是否关闭面板。使用了RectTransform和Camera组件来获取屏幕坐标并转换为世界坐标，然后与面板的四个角的世界坐标进行比较。

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

public class AutoClosePanel : MonoBehaviour {
    public RectTransform rectTransform;
    public Camera uiCamera;
    
    //// Update is called once per frame
    void Update()
    {
#if UNITY_EDITOR
        if (Input.GetMouseButtonDown(0))
        {
            CheckClose(Input.mousePosition);
        }
#else
        if (Input.touchCount > 0) {
            for (int i = 0; i < Input.touchCount; i++)
            {
                CheckClose(Input.GetTouch(i).position);
            }
        }
#endif
    }

    void Close()
	{
        this.gameObject.SetActive(false);
	}

    void Show() {
        this.gameObject.SetActive(true);
    }

    void CheckClose(Vector3 clickPosition) {
        if (IsClickPanelOutsid(clickPosition))
        {
            Debug.Log("click out side");
            Close();
        }
        else {
            Debug.Log("click inside side");
        }
    }

    bool IsClickPanelOutsid(Vector3 clickPosition)
    {
       Vector3 clickWorldPos = uiCamera.ScreenToWorldPoint(clickPosition);
        Vector3[] cornerArray = new Vector3[4];// 左下，左上，右上，右下
        this.rectTransform.GetWorldCorners(cornerArray);
        Debug.Log("clickWorldPos:"+clickWorldPos);
        for (int i = 0; i < cornerArray.Length; i++)
        {
            Debug.Log("cornerArray:" + cornerArray[i]);
        }
            //Vector3 leftBottomPosition = uiCamera.WorldToScreenPoint(cornerArray[0]);
            //Vector3 rightTopPosition = uiCamera.WorldToScreenPoint(cornerArray[2]);
            //Debug.Log("leftBotomPoint:"+leftBottomPosition);
            //Debug.Log("rightTopPoint"+rightTopPosition);
            //Debug.Log("clickPosition:"+clickPosition);
        float minX = cornerArray[0].x;
        float minY = cornerArray[0].y;
        float maxX = cornerArray[2].x;
        float maxY = cornerArray[2].y;
        if (clickWorldPos.x > minX && clickWorldPos.y>minY && clickWorldPos.x < maxX && clickWorldPos.y < maxY)
        {
            return false;
        }
        return true;
    }




}