UGUI Tab键切换InputField

需求

游戏登录界面输入框之间的跳转用tab去实现

代码

    using UnityEngine;    using System.Collections;    using UnityEngine.EventSystems;    using UnityEngine.UI;    /// <summary>    /// UGUI Tab键切换InputField    /// </summary>    public class InputNavigator : MonoBehaviour,ISelectHandler,IDeselectHandler {        private EventSystem system;        private bool isSelect = false;        void Start () {            system = EventSystem.current;        }        void Update () {            if (Input.GetKeyDown(KeyCode.Tab) && isSelect)            {                Selectable next = null;                 var sec=system.currentSelectedGameObject.GetComponent<Selectable>();                if (Input.GetKey(KeyCode.LeftShift) || Input.GetKey(KeyCode.RightShift))                {                    next = sec.FindSelectableOnUp();                    if (next == null)                        next = sec;                }                else                {                    next = sec.FindSelectableOnDown();                    if (next == null)                        next = sec;                }                if (next != null)                {                    var inputField = next.GetComponent<InputField>();                    if (inputField == null) return;                    system.SetSelectedGameObject(next.gameObject,new BaseEventData(system));                }            }        }        public void OnSelect(BaseEventData eventData)        {            isSelect = true;        }        public void OnDeselect(BaseEventData eventData)        {            isSelect = false;        }    }