Unity UGUI 下拉菜单

1.新建Buttom

2.panel里面加下拉buttom

using UnityEngine;
using System.Collections;

public class DropDownList : MonoBehaviour {

    public GameObject panel;
    void Start ()
    {
        panel.SetActive (false);
    }public void HideOrShow()
    {
        panel.SetActive (!panel.activeSelf);
    }
}

http://www.unity.5helpyou.com/2647.html

ugui无法在android父类对齐：

xxx.transform.GetComponent<RectTransform>().localPosition = Vector3.zero;