如何开发一个简单的游戏对话框模块？

前言

对话框可以增强玩家游戏沉浸感，增加与NPC情感联系，甚至画外音补充角色内心独白。总而言之，是一个非常重要，常见的功能，所以我分享一下对话框系统简单的框架流程，有兴趣的朋友可以基于此再进行二次开发。

对话演示

代码展示

代码结构：

场景结构：

DialogueData.cs

using System.Collections.Generic;

namespace XiaYun.Dialogue
{
    public static class DialogueData
    {
        public class Data
        {
            public int sid;
            public string name;
            public string content;
            public int[] jumpList;
        }

        public static Dictionary<int, Data> Datas = new Dictionary<int, Data>()
        {
            [1] = new Data()
            {
                sid = 1,
                name = "玩家",
                content = "你好呀,NPC",
                jumpList = new []{2}
            },
            [2] = new Data()
            {
                sid = 2,
                name = "NPC",
                content = "你好玩家，可以帮个忙吗？",
                jumpList = new []{3, 4}
            },
            [3] = new Data()
            {
                sid = 3,
                name = "玩家",
                content = "当然，乐意效劳"
            },
            [4] = new Data()
            {
                sid = 4,
                name = "玩家",
                content = "抱歉，我还有要事在身"
            }
        };
    }
}

DialogueSelectBox.cs

using UnityEngine;
using UnityEngine.UI;

namespace XiaYun.Dialogue
{
    public class DialogueSelectBox : MonoBehaviour
    {
        public Button button;
        public Text text;
    }
}

DialogueUI.cs

using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

namespace XiaYun.Dialogue
{
    public class DialogueUI : MonoBehaviour
    {
        public Button btn开始对话;
        public GameObject go对话节点;
        public Text text名字;
        public Text text内容;
        public Button btn前进;
        public List<DialogueSelectBox> boxList;

        private int curSid;
        private Action<int> action;

        private void Start()
        {
            btn开始对话.onClick.AddListener(() =>
            {
                btn开始对话.gameObject.SetActive(false);
                go对话节点.SetActive(true);
                StartDialogue(1, (sid) =>
                {
                    switch (sid)
                    {
                        case 3:
                            // 寻路至任务点等等...
                            Debug.Log("对话结束，自动行进下一步");
                            break;
                    }
                });
            });
            
            btn前进.onClick.AddListener(() =>
            {
                var data = DialogueData.Datas[curSid];
                if (data.jumpList == null || data.jumpList.Length != 1)
                {
                    return;
                }
                
                DoJump(data.jumpList[0]);
            });
        }

        public void StartDialogue(int sid, Action<int> action)
        {
            this.action = action;
            DoJump(sid);
        }

        private void DoJump(int sid)
        {
            curSid = sid;
            var data = DialogueData.Datas[sid];

            if (data.jumpList == null || data.jumpList.Length == 0)
            {
                CloseDialogue();
                return;
            }
            
            text名字.text = data.name;
            text内容.text = data.content;
            
            // 仅做演示，正常不能写
            if (data.jumpList != null && data.jumpList.Length > 1)
            {
                for (int i = 0; i < boxList.Count; i++)
                {
                    var box = boxList[i];
                    box.gameObject.SetActive(i < data.jumpList.Length);
                    int nextSid = data.jumpList[i];
                    box.text.text = DialogueData.Datas[nextSid].content;
                    box.button.onClick.RemoveAllListeners();
                    box.button.onClick.AddListener(() =>
                    {
                        DoJump(nextSid);
                    });
                }
                btn前进.gameObject.SetActive(false);
            }
            else
            {
                for (int i = 0; i < boxList.Count; i++)
                {
                    boxList[i].gameObject.SetActive(false);
                }
                btn前进.gameObject.SetActive(true);
            }
        }

        private void CloseDialogue()
        {
            btn开始对话.gameObject.SetActive(true);
            go对话节点.SetActive(false);
            action?.Invoke(curSid);
        }
    }
}