Game视图

Hierarchy视图

在开发中遇到省市选择器，再次提供一个思路。

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using System.Collections.Generic;

public class Test : MonoBehaviour
{

    public Dropdown dropList1;
    public Dropdown dropList2;
    public List<string[]> listArray;
    void Start()
    {
        Test1(dropList1, dropList2); //初始化
        dropList1.onValueChanged.AddListener(ListenValueChanged); //第一个drop添加事件
    }
    /// <summary>
    /// 选择第一个drop后第二个drop初始化
    /// </summary>
    /// <param name="index">Index.</param>
    public void ListenValueChanged(int index)
    {
        string[] array1 = new string[] { "河北", "北京", "海南省" };
        dropList2.options.Clear();
        for (int i = 0; i < listArray[index].Length; i++)
        {
            Dropdown.OptionData o1 = new Dropdown.OptionData();
            o1.text = listArray[index][i];
            dropList2.options.Add(o1);
        }
        dropList1.captionText.text = array1[index];
        dropList2.captionText.text = listArray[index][0];
    }
    /// <summary>
    /// 第一个初始化
    /// </summary>
    /// <returns>The test1.</returns>
    /// <param name="d1">D1.</param>
    /// <param name="d2">D2.</param>
    private void Test1(Dropdown d1, Dropdown d2)
    {
        d1.options.Clear();
        d2.options.Clear();
        string[] array1 = new string[] { "河北", "北京", "海南省" };
        for (int i = 0; i < array1.Length; i++)
        {
            Dropdown.OptionData o1 = new Dropdown.OptionData();
            o1.text = array1[i];
            dropList1.options.Add(o1);
        }
        string[] arrayOne = new string[] { "石家庄", "唐山", "保定", "秦皇岛", "沧州", "承德", "邯郸", "衡水", "廊坊", "邢台", "张家口" };
        string[] arrayTwo = new string[] { "东城", "西城", "东城", "海淀", "朝阳", "丰台", "门头沟", "石景山", "房山", "通州", "顺义", "昌平", "大兴", "怀柔", "平谷", "延庆", "密云" };
        string[] arrayThree = new string[] { "海口市", "三亚市", "三沙市", "儋州市" };
        listArray = new List<string[]>();
        listArray.Add(arrayOne);
        listArray.Add(arrayTwo);
        listArray.Add(arrayThree);
        for (int i = 0; i < listArray[0].Length; i++)
        {
            Dropdown.OptionData o1 = new Dropdown.OptionData();
            o1.text = listArray[0][i];
            dropList2.options.Add(o1);
        }
        dropList1.captionText.text = array1[0];
        dropList2.captionText.text = listArray[0][0];
    }
}