UIManager.cs - UI界面

BasePanel.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;
/// <summary>
/// 通过代码，快速找到所有子控件
/// </summary>
public class BasePanel : MonoBehaviour
{
    private Dictionary<string, List<UIBehaviour>> controlDic = new Dictionary<string, List<UIBehaviour>>();//里氏转换,所有控件
    // Start is called before the first frame update
    void Awake()
    {
        FindChildrenControl<Button>();
        FindChildrenControl<Image>();
        FindChildrenControl<Toggle>();
        FindChildrenControl<Text>();
        FindChildrenControl<Scrollbar>();
        FindChildrenControl<ScrollRect>();
        FindChildrenControl<Slider>();
    }
    /// <summary>
    /// 显示
    /// </summary>
    public virtual void ShowMe()
    {
    }
    /// <summary>
    /// 隐藏
    /// </summary>
    public virtual void HideMe()
    {
    }
    /// <summary>
    /// 得到对应名字的控件
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="controlName"></param>
    /// <returns></returns>
    protected T GetControl<T>(string controlName)where T: UIBehaviour
    {
        if (controlDic.ContainsKey(controlName))
        {
            //for循环字典
            for(int i = 0; i < controlDic[controlName].Count; ++i)
            {
                if(controlDic[controlName][i] is T)
                {
                    return controlDic[controlName][i] as T;
                }
            }
        }
        return null;
    }
    /// <summary>
    /// 找Panel的控件们
    /// </summary>
    /// <typeparam name="T"></typeparam>
    private void FindChildrenControl<T>() where T: UIBehaviour
    {
        T[] controls = this.GetComponentsInChildren<T>();//Panel所有的Button组件
        //循环找所有控件，保存到字典里
        for (int i = 0; i < controls.Length; ++i)
        {
            string objName = controls[i].gameObject.name;//这是控件名字
            //字典有就加，没有就新建
            if (controlDic.ContainsKey(objName))
                controlDic[objName].Add(controls[i]);
            else
                controlDic.Add(objName, new List<UIBehaviour>() { controls[i] });
        }
    }
}

UIManager.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
//枚举，UI层级
public enum E_UI_Layer
{
    Bot,
    Mid,
    Top,
    System,
}
public class UIManager : BaseManager<UIManager>
{
    public Dictionary<string, BasePanel> panelDict = new Dictionary<string, BasePanel>();
    //层级
    private Transform bot;//获得bot
    private Transform mid;//获得mid
    private Transform top;//获得top
    private Transform system;//获得system
    /// <summary>
    /// 构造函数:创建Canvas和EventSystem
    /// </summary>
    public UIManager()
    {
        GameObject obj = ResourcesManager.GetInstance().Load<GameObject>("UI/Canvas");
        Transform canvas = obj.transform;
        Object.DontDestroyOnLoad(obj);//过场景不移除
        //找到各层
        bot = canvas.Find("Bot");
        mid = canvas.Find("Mid");
        top = canvas.Find("Top");
        system = canvas.Find("System");
        GameObject es = ResourcesManager.GetInstance().Load<GameObject>("UI/EventSystem");
        Object.DontDestroyOnLoad(es);//过场景不移除
    }
    /// <summary>
    /// 显示面板
    /// </summary>
    /// <typeparam name="T">面板脚本类型</typeparam>
    /// <param name="panelName">面板名</param>
    /// <param name="layer">层级(可不填)</param>
    /// <param name="callBack">创建面板预设成功后做的事(可不填)</param>
    public void ShowPanel<T>(string panelName,E_UI_Layer layer = E_UI_Layer.Mid,UnityAction<T> callBack = null)where T:BasePanel
    {
        if (panelDict.ContainsKey(panelName))
        {
            panelDict[panelName].ShowMe();
            if (callBack != null)
                callBack(panelDict[panelName] as T); return;
        }
        ResourcesManager.GetInstance().LoadAsync<GameObject>("UI/" + panelName, (obj) =>
         {
             //把它作为canvas的子对象，位置
             //确定显示层级
             Transform father = bot;
             switch (layer)
             {
                 case E_UI_Layer.Mid:
                     father = mid;
                     break;
                 case E_UI_Layer.Top:
                     father = top;
                     break;
                 case E_UI_Layer.System:
                     father = system;
                     break;
             }
             //设置父对象 相对位置 大小
             obj.transform.SetParent(father);
             obj.transform.localPosition = Vector3.zero;
             obj.transform.localScale = Vector3.one;
             (obj.transform as RectTransform).offsetMax = Vector3.zero;
             (obj.transform as RectTransform).offsetMin = Vector3.zero;
             //得到预设体身上的脚本
             T panel = obj.GetComponent<T>();
             if (callBack != null)
                 callBack(panel);
             //保存在字典里
             panelDict.Add(panelName, panel);
         });
    }
    /// <summary>
    /// 隐藏
    /// </summary>
    public void HidePanel(string panelName)
    {
        if (panelDict.ContainsKey(panelName))
        {
            panelDict[panelName].HideMe();
            GameObject.Destroy(panelDict[panelName].gameObject);
            panelDict.Remove(panelName);
        }
    }
}