增加消息面板功能

Assets/Gameplay/Scripts/UI/Element/MessageElement.cs

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+using UnityEngine;
+using MonsterLove.StateMachine;
+using DG.Tweening;
+
+public enum MessageStates
+{
+    Init,
+    Add,
+    Show,
+    Del
+}
+
+public class MessageElement : MonoBehaviour
+{
+    [SerializeField] TMPro.TextMeshProUGUI messageText;
+
+    public RectTransform RectTransform
+    {
+        get
+        {
+            return transform as RectTransform;
+        }
+    }
+
+    public string Message { get; private set; }
+
+    private float remaining;
+
+    private MessagePanel panel;
+
+    StateMachine<MessageStates> fsm;
+
+    public void Init(MessagePanel panel, string message, float duration)
+    {
+        this.panel = panel;
+
+        Message = message;
+        remaining = duration;
+
+        if (remaining < 0)
+        {
+            remaining = float.MaxValue;
+        }
+
+        if (fsm is null)
+        {
+            fsm = StateMachine<MessageStates>.Initialize(this);
+        }
+        fsm.ChangeState(MessageStates.Init);
+    }
+
+    private void Init_Enter()
+    {
+        // 这里初始化，包括位置和消息信息
+        messageText.text = Message;
+        messageText.rectTransform.anchoredPosition = new Vector2(messageText.rectTransform.rect.width, 0);
+
+        fsm.ChangeState(MessageStates.Add);
+    }
+
+    private void Add_Enter()
+    {
+        // 这里播动画
+        messageText.rectTransform.DOAnchorPosX(0, 0.2f);
+
+        fsm.ChangeState(MessageStates.Show);
+    }
+
+    private void Show_Update()
+    {
+        remaining -= Time.deltaTime;
+        if (remaining <= 0)
+        {
+            remaining = float.MaxValue;
+            fsm.ChangeState(MessageStates.Del);
+        }
+    }
+
+    private void Del_Enter()
+    {
+        // 理论上这里也需要做个动画，先不管了
+
+        panel.DelMessage(this);
+    }
+
+}

Assets/Gameplay/Scripts/UI/Element/MessageElement.cs.meta

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+fileFormatVersion: 2
+guid: 6a0067f01fbaadf478392b05bee47a0d