unity游戏引擎-如何在unity3d运行时创建下拉列表

Question

我是Unity的新手，所以我不知道如何在Unity3d运行时创建下拉列表

我能够创建列表一旦场景加载按照下面给出的例子链接http://wiki.unity3d.com/index.php?title=PopupList

但是我不知道如何在运行时创建这些，我试过创建这个类。

#pragma strict
class CustomList extends MonoBehaviour 
{
    var title:String;
    var top:int;
    var left:int;
    var width:int;
    var height:int;
    private var listEntry = 0;
    private var list : GUIContent[];
    private var listStyle : GUIStyle;
    private var showList = false;
    public function CustomList(title:String,top:int,left:int,width:int,height:int){
       this.title = title;
       this.top=top;
       this.left = left;
       this.width = width;
       this.height = height; 
       list = new GUIContent[1]; 
       list[0] = new GUIContent("Granite");
       // Make a GUIStyle that has a solid white hover/onHover background to indicate highlighted items
       listStyle = new GUIStyle();
       listStyle.normal.textColor = Color.white;
       var tex = new Texture2D(2, 2);
       var colors = new Color[4];
       for (color in colors) color = Color.white;
       tex.SetPixels(colors);
       tex.Apply();
       listStyle.hover.background = tex;
       listStyle.onHover.background = tex;
       listStyle.padding.left = listStyle.padding.right = listStyle.padding.top = listStyle.padding.bottom = 4;  
    }
    function Start () {
    }
    function OnGUI () {
       Debug.Log("title for list is  : "+title);
       GUI.Label (Rect(10, 10, 100, 10), "You picked !");
       if (Popup.List (Rect(top, left, width, height), showList, listEntry, GUIContent(this.title), list, listStyle)) {
         GUI.Label (Rect(200, 70, 400, 20), "You picked !");
       }
    }
}

但是我不能将它添加到for循环中，如下所示

for(var objCategory:Category in objCategoryList.listCategory){
       new CustomList(objCategory.categoryName,100,ctr*100,100,20);
       ctr++;
    }

谁能建议什么是错误的在这个代码片段和什么是正确的方式做这个在unity3d javascript

Answer 1

我已经将我的代码更改为下面以使其工作

#pragma strict
class CustomLayout extends  MonoBehaviour 
{
    private var listEntry = 0;
    private var list : GUIContent[];
    private var listStyle : GUIStyle;
    private var showList = false;
    public function testLayout(){       
        list = new GUIContent[1];   
        list[0] = new GUIContent("Granite");
        // Make a GUIStyle that has a solid white hover/onHover background to indicate highlighted items
        listStyle = new GUIStyle();
        listStyle.normal.textColor = Color.white;
        var tex = new Texture2D(2, 2);
        var colors = new Color[4];
        for (color in colors) color = Color.white;
        tex.SetPixels(colors);
        tex.Apply();
        listStyle.hover.background = tex;
        listStyle.onHover.background = tex;
        listStyle.padding.left = listStyle.padding.right = listStyle.padding.top = listStyle.padding.bottom = 4;            
    }
    function OnGUI () {
        var ctr:int =0;     
        for(var objCategory:Category in DropdownList.objCategoryList.listCategory){
            if (Popup.List (Rect(50, 50+(ctr*25), 100, 20), showList, listEntry, GUIContent(objCategory.categoryName), list, listStyle)) {
                GUI.Label (Rect(200, 70, 400, 20), "You picked !");
            }
            ctr++;
        }       
    }
}

在主类中像这样实例化

gameObject.AddComponent(CustomLayout);