可以拖动的GUI窗体

using UnityEngine;using System.Collections;public class NewBehaviourScript6 : MonoBehaviour {    bool choose=false;    Rect window0=new Rect(20,20,400,90);    string edit="请输入字符串: ";    // Use this for initialization    void Start () {        }        // Update is called once per frame    void OnGUI () {        GUI.Button(new Rect(100,100,100,100),"自定义按钮");        choose=GUI.Toggle(new Rect(10,50,100,30),choose,"单项选择");        edit=GUI.TextField(new Rect(200,10,200,30),edit,15);        window0=GUI.Window(0,window0,Setwindow,"这是一个窗口");    }    void Setwindow(int windowID){        GUI.DragWindow();        GUI.Button(new Rect(10,20,100,30),"自定义按钮");    }}