[]ComboBox显示问题

package ui.modules.MainHead {
import laya.ui.*;
import laya.display.*; 
public class MainHeadUI extends View {
public var image1:Image;
public var input:TextInput;
public var combox:ComboBox;
public var radio:RadioGroup;
public var checkBox:CheckBox;
public var gongji:Button;
public var btn1HasLabel:Button;
public static var uiView:Object = {"type": "View", "props": {"x": "0", "y": "0", "width": 388, "height": 376}, "child": [{"type": "ComboBox", "props": {"var": "combox", "stateNum": "1", "x": 7, "y": 146, "width": 91, "height": 23, "skin": "MainHead/combobox1.png", "labels": "hihihi,hihihi2,hihihi2"}}]};
override protected function createChildren():void {
super.createChildren();
createView(uiView);
}
}
}
为什么我这个ComboBox的label文字没有显示的？