UGUI中按Tab切换InputField

本文转自风冻冰痕博客，固定链接: http://icemark.cn/blog/?p=253

目前的UGUI在InputField里即使设置了Navigation也是不可以用键盘切换上下，所以自己写了个组件实现这个功能

前提条件是要在InputField里设置Navigation，也就是必须能找到上一个控件和下一个控件

然后将以下脚本挂在需要切换的InputField上，用Tab和Shift+Tab切换：

using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;

public class InputNavigator : MonoBehaviour, ISelectHandler, IDeselectHandler
{
EventSystem system;
private bool _isSelect = false;

void Start()
{
system = EventSystem.current;
}

void Update()
{
if (Input.GetKeyDown(KeyCode.Tab) && _isSelect)
{

Selectable next = null;
if (Input.GetKey(KeyCode.LeftShift) || Input.GetKey(KeyCode.RightShift))
{
next = system.currentSelectedGameObject.GetComponent<Selectable>().FindSelectableOnUp();
if (next == null) next = system.lastSelectedGameObject.GetComponent<Selectable>();
}
else
{
next = system.currentSelectedGameObject.GetComponent<Selectable>().FindSelectableOnDown();
if (next == null) next = system.firstSelectedGameObject.GetComponent<Selectable>();
}
if (next != null)
{
InputField inputfield = next.GetComponent<InputField>();
system.SetSelectedGameObject(next.gameObject, new BaseEventData(system));
}
else
{
Debug.LogError("找不到下一个控件");
}
}
}

public void OnSelect(BaseEventData eventData)
{
_isSelect = true;
}

public void OnDeselect(BaseEventData eventData)
{
_isSelect = false;
}
}