道具栏的图标 拖到 快捷键

using UnityEngine;
using System.Collections;

public class NewBehaviourScript : MonoBehaviour {

    public GUISkin guiskin;
    //~ public GUIStyle closedButton;
    public GUIStyle boxbg;

    public int Int_F;     //快捷键
    string [] Str=new string[]{"F1","F2","F3"};

    public int Int_commodity;
    string [] Str_commodity=new string[]{"物品1","物品2","物品3","物品4","物品5","物品6",};

    //定义道具栏面板变量
    public Texture img;
    Vector2 prop=new Vector2(0,100);
    public Texture img1;
    Vector2 prop1=new Vector2(50,100);
    public Texture img2;
    Vector2 prop2=new Vector2(100,100);
    public Texture img3;
    Vector2 prop3=new Vector2(150,100);
    public Texture img4;
    Vector2 prop4=new Vector2(200,100);
    public Texture img5;
    Vector2 prop5=new Vector2(250,100);
    public Texture img6;
    Vector2 prop6=new Vector2(300,100);

    //———————————
    //定义快捷键面板变量
    public Texture imgF1;
    Vector2 temp1=new Vector2(0,0);
    public Texture imgF2;
    Vector2 temp2=new Vector2(50,0);
    public Texture imgF3;
    Vector2 temp3=new Vector2(100,0);

    //———————————

    Vector2 second = Vector2.zero;
    int Int_img;

    Texture [] Str_img;

    // Use this for initialization
    void Start () {
        Str_img=new Texture[]{img1,img2,img3,img4,img5,img6};
        imgF1=imgF2=imgF3=img;
    }

    void Update () {

    }

    void OnGUI() {
        GUI.skin=guiskin;
    //道具
    GUI.Button (new Rect(prop1.x,prop1.y,50,50), img1);
    GUI.Button (new Rect(prop2.x,prop2.y,50,50), img2);
    GUI.Button (new Rect(prop3.x,prop3.y,50,50), img3);
    GUI.Button (new Rect(prop4.x,prop4.y,50,50), img4);
    GUI.Button (new Rect(prop5.x,prop5.y,50,50), img5);
    GUI.Button (new Rect(prop6.x,prop6.y,50,50), img6);

    GUI.BeginGroup (new Rect(0,0,200,250));               //快捷键
    GUI.Button (new Rect(temp1.x,temp1.y,50,50), imgF1);
    GUI.Button (new Rect(temp2.x,temp2.y,50,50), imgF2);
    GUI.Button (new Rect(temp3.x,temp3.y,50,50), imgF3);
    GUI.EndGroup();
    chuanru();
    if(KJJ(Int_commodity)&&Input.GetKeyUp(KeyCode.Mouse0))
    {
        if(second.x>temp1.x&&second.y>temp1.y&&second.x<(temp1.x+50)&&second.y<(temp1.y+50))
        {
            imgF1=KJJ(Int_commodity);
            Int_commodity=-1;
        }
        else if(second.x>temp2.x&&second.y>temp2.y&&second.x<(temp2.x+50)&&second.y<(temp2.y+50))
        {
            imgF2=KJJ(Int_commodity);
            Int_commodity=-1;
        }
        else if(second.x>temp3.x&&second.y>temp3.y&&second.x<(temp3.x+50)&&second.y<(temp3.y+50))
        {
            imgF3=KJJ(Int_commodity);
            Int_commodity=-1;
        }
        else if(Input.GetKeyUp(KeyCode.Mouse0))
        {
            Int_commodity=-1;
        }
    }

    }
    int chuanru()
    {
        second = Event.current.mousePosition;

        if(second.x>prop1.x&&second.y>prop1.y&&second.x<(prop1.x+50)&&second.y<(prop1.y+50)&&Input.GetKey(KeyCode.Mouse0))
        {
            Int_commodity=0;
        }
        else if(second.x>prop2.x&&second.y>prop2.y&&second.x<(prop2.x+50)&&second.y<(prop2.y+50)&&Input.GetKey(KeyCode.Mouse0))
        {
            Int_commodity=1;
        }
        else if(second.x>prop3.x&&second.y>prop3.y&&second.x<(prop3.x+50)&&second.y<(prop3.y+50)&&Input.GetKey(KeyCode.Mouse0))
        {
            Int_commodity=2;
        }
        else if(second.x>prop4.x&&second.y>prop4.y&&second.x<(prop4.x+50)&&second.y<(prop4.y+50)&&Input.GetKey(KeyCode.Mouse0))
        {
            Int_commodity=3;
        }
        else if(second.x>prop5.x&&second.y>prop5.y&&second.x<(prop5.x+50)&&second.y<(prop5.y+50)&&Input.GetKey(KeyCode.Mouse0))
        {
            Int_commodity=4;
        }
        else if(second.x>prop6.x&&second.y>prop6.y&&second.x<(prop6.x+50)&&second.y<(prop6.y+50)&&Input.GetKey(KeyCode.Mouse0))
        {
            Int_commodity=5;
        }

        return Int_commodity;
    }

    Texture KJJ(int ABC)
    {
        Texture img_img=new Texture();
        switch (ABC)
        {
            case 0:
            img_img=img1;
            break;
            case 1:
            img_img=img2;
            break;
            case 2:
            img_img=img3;
            break;
            case 3:
            img_img=img4;
            break;
            case 4:
            img_img=img5;
            break;
            case 5:
            img_img=img6;
            break;
        }
        second = Event.current.mousePosition ;
        GUI.Label(new Rect(second.x,second.y,50,50),img_img);
        return img_img;
    }
}