创建UIManager，管理所有UI面板
准备工作：
1. 创建Canvas并设置Tag为Main Canvas
2. 在Canvas下新建五个层级节点，因为UGUI显示层级越往下越靠前
using System;
using System.Collections.Generic;
using UnityEngine; public class UIManager : Singleton<UIManager>
{
public UIManager() { Init(); } private List<Transform> m_parent = new List<Transform>();
private List<UIBase> m_panel = new List<UIBase>(); private int current_ID; private void Init()
{
GameObject canvas = GameObject.FindGameObjectWithTag("Main Canvas"); if (canvas != null)
{
UnityEngine.UI.CanvasScaler scale = canvas.GetComponent<UnityEngine.UI.CanvasScaler>();
if (Screen.width / (float)Screen.height > / 9f)
{
scale.matchWidthOrHeight = ;
}
//获取节点
for (int i = ; i < (int)PanelType.Count; i++)
{
PanelType _panel = (PanelType)i;
m_parent.Add(canvas.transform.Find(_panel.ToString()));
}
}
else
{
Debug.LogError("Can't Find a GameObject whose Tag is 'Main Canvas'!");
}
} public void Open<T>(string panel_name, bool onlyOne = true, PanelType panel_type = PanelType.Window, PanelEvent panel_event = PanelEvent.None) where T : UIBase, new()
{
Transform parent = GetParent(panel_type); switch (panel_event)
{
case PanelEvent.Hide_Pre:
if (m_panel.Count != )
{
m_panel[m_panel.Count - ].SetActive(false);
}
break;
case PanelEvent.Close_Pre:
if (m_panel.Count != )
{
m_panel[m_panel.Count - ].Close();
m_panel.RemoveAt(m_panel.Count - );
}
break;
case PanelEvent.Close_All:
for (int i = ; i < m_panel.Count; i++)
{
m_panel[i].Close();
}
m_panel.Clear();
break;
default: break;
} try
{
UIBase panel = null; if (onlyOne)
{
for (int i = ; i < m_panel.Count; i++)
{
if (m_panel[i].panel_name == panel_name)
{
panel = m_panel[i];
m_panel.RemoveAt(i);
break;
}
} if (panel != null)
{
panel.SetParent(parent);
panel.First();
panel.Reopen();
}
else
{
panel = InitPanel<T>(panel_name, parent);
}
}
else
{
panel = InitPanel<T>(panel_name, parent);
} panel.panel_ID = NextID();
panel.panel_name = panel_name;
panel.panel_type = panel_type;
m_panel.Add(panel);
}
catch (Exception e)
{
Debug.LogError(e.Message);
}
} public void Back()
{
if (m_panel.Count != )
{
m_panel[m_panel.Count - ].Close();
m_panel.RemoveAt(m_panel.Count - );
}
//刷新当前界面
if (m_panel.Count != )
{
m_panel[m_panel.Count - ].Reopen();
}
} public void Close(int panel_ID)
{
for (int i = ; i < m_panel.Count; i++)
{
if (m_panel[i].panel_ID == panel_ID)
{
m_panel[i].Close();
m_panel.RemoveAt(i);
break;
}
}
} public void Close(string panel_name)
{
for (int i = ; i < m_panel.Count; i++)
{
if (m_panel[i].panel_name == panel_name)
{
m_panel[i].Close();
m_panel.RemoveAt(i);
break;
}
}
} public void Close_All()
{
for (int i = ; i < m_panel.Count; i++)
{
m_panel[i].Close();
}
m_panel.Clear();
} public void Main()
{
for (int i = ; i < m_panel.Count; i++)
{
m_panel[i].Close();
}
m_panel.Clear(); Open<UI_Test>("UI_Main");
} public UIBase Top()
{
if (m_panel.Count > )
{
return m_panel[m_panel.Count - ];
}
else
{
return null;
}
} public UIBase Get(int panel_ID)
{
return m_panel.Find(x => x.panel_ID == panel_ID);
} public UIBase Get(string panel_name)
{
return m_panel.Find(x => x.panel_name == panel_name);
} private UIBase InitPanel<T>(string panel_name, Transform parent) where T : UIBase
{
UIBase component = null; //从对象池获取
GameObject go = PoolManager.Instance.Pop(panel_name); if (go == null)
{
//PanelData.Path[?]自定义数据存储预制体路径
string panel_path = PanelData.Path[panel_name];
GameObject prefab = Resources.Load<GameObject>(panel_path);
go = GameObject.Instantiate(prefab, parent);
}
else
{
go.transform.SetParent(parent, true);
} component = go.GetComponent<T>();
if (component == null)
{
component = go.AddComponent<T>();
} return component;
} private Transform GetParent(PanelType panel_type)
{
Transform parent = null; try
{
parent = m_parent[(int)panel_type];
}
catch (Exception e)
{
Debug.LogError(e.Message);
} return parent;
} private int NextID()
{
if (++current_ID >= int.MaxValue)
{
current_ID = ;
}
return current_ID;
}
} public enum PanelType
{
Bottom,
Base,
Window,
Widget,
Top,
Count,
} public enum PanelEvent
{
None,
Hide_Pre,
Close_Pre,
Close_All,
}
UIManager
UIBase是抽象类，需创建实例类继承
using System;
using System.Collections;
using UnityEngine; public abstract class UIBase : MonoBehaviour
{
[HideInInspector] public int panel_ID;
[HideInInspector] public string panel_name;
[HideInInspector] public PanelType panel_type; protected CanvasGroup panel_canvas; public virtual void Close(Action callBack = null)
{
if (callBack != null)
{
callBack();
}
PoolManager.Instance.Push(panel_name, gameObject);
} public virtual void Reopen()
{
Refresh();
SetActive(true);
} public virtual void Refresh()
{ } public void Delay(float time, Action callBack = null)
{
StartCoroutine(DelayedExecution(time, callBack));
} private IEnumerator DelayedExecution(float time, Action callBack)
{
yield return new WaitForSeconds(time); if (callBack != null)
{
callBack();
}
} public void First()
{
if (transform.parent != null)
{
transform.SetSiblingIndex(transform.parent.childCount - );
}
} public void SetName(string name)
{
transform.name = name;
} public void SetActive(bool active)
{
if (gameObject.activeSelf != active)
{
gameObject.SetActive(active);
}
} public void SetActive_Canvas(bool active)
{
if (panel_canvas != null)
{
panel_canvas.alpha = active ? : ;
panel_canvas.interactable = active;
panel_canvas.blocksRaycasts = active;
}
} public void SetParent(Transform parent)
{
if (transform.parent != parent)
{
transform.SetParent(parent);
}
} public override string ToString()
{
return panel_name;
}
}
UIBase