平台游戏控制器之计时功能

ready动画结束后游戏开始,开始计时,直到死亡或者胜利再暂停计时。

新建ClearTime脚本用来更新时间文本,开始动画过后再计时

public class ClearTime : MonoBehaviour
{
  [SerializeField] Text timeText;
  [SerializeField] VoidEventChannel levelStartedEventChannel;//开始游戏
  [SerializeField] VoidEventChannel levelClearedEventChannel;//玩家过关
  [SerializeField] StringEventChannel cleardTimeTextEventChannel;//带string参数的频道
  [SerializeField] VoidEventChannel playerDefeatedEventChannel;//玩家失败
  float clearTime;//时间
  bool stop = true;//计时停止

  private void OnEnable()
  {
    //游戏开始
    levelStartedEventChannel.AddListener(LevelStart);
    //玩家通关
    levelClearedEventChannel.AddListener(levelCleared);
    //玩家失败
    playerDefeatedEventChannel.AddListener(HideUI);
  }
  private void OnDisable()
  {
    //游戏开始
    levelStartedEventChannel.RemoveListener(LevelStart);
    //玩家通关
    levelClearedEventChannel.RemoveListener(levelCleared);
    //玩家失败
    playerDefeatedEventChannel.RemoveListener(HideUI);
  }
  private void FixedUpdate()
  {//当计时停止时 返回.
    if (stop)
      return;
    clearTime += Time.fixedDeltaTime;
    //将clearTime转化为秒,按格式输出
    timeText.text = System.TimeSpan.FromSeconds(clearTime).ToString(@"mm\:ss\:ff");
  }
  void LevelStart()
  {//开始游戏
    stop = false;//开始计时
  }
  void levelCleared()
  {//过关
    HideUI();
    cleardTimeTextEventChannel.Broadcast(timeText.text);
  }
  void HideUI()
  {
    stop = true;//计时停止
    GetComponent<Canvas>().enabled = false;//关闭ui显示
  }
}

过关时间显示在Victory Screen

创建带参数的EventChannel.事件频道

创建脚本OneParameterEventChannel设置为泛型,用来继承,方便以后传不同类型参数

public class OneParameterEventChannel<T> : ScriptableObject
{
  //单参数事件频道
  event System.Action<T> Delegate;
  public void Broadcast(T obj)
  {
    Delegate?.Invoke(obj);//调用委托
  }
  public void AddListener(System.Action<T> action) { Delegate += action; }//订阅
  public void RemoveListener(System.Action<T> action) { Delegate -= action; }//退订
}

创建StringEventChannel继承OneParameterEventChannel并且参数类型为<string>

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
[CreateAssetMenu(menuName = "Data/EventChannels/StringEventChannel", fileName = "StringEventChannel_")]
public class StringEventChannel : OneParameterEventChannel<string>
{
}

这样就可以在相应的地方加入参数传递。

在VictoryScreen获胜ui中获取文本对象[SerializeField] Text timeText;，还有[SerializeField] StringEventChannel clearTimeTextEventChannel;//带string参数的频道

OnEnable()和OnDisable()分别订阅/退订方法SetTimeText()，该方法将获取的string参数赋值给Text timeText，

[SerializeField] Text timeText;
[SerializeField] StringEventChannel clearTimeTextEventChannel;//带string参数的频道
 private void OnEnable()
 {
   clearTimeTextEventChannel.AddListener(SetTimeText);
 }
private void OnDisable()
 {
   clearTimeTextEventChannel.RemoveListener(SetTimeText);
 }
private void SetTimeText(string obj)
 {
   timeText.text = obj;
 }

接着看ClearTime脚本，同样序列化cleardTimeTextEventChannel [SerializeField] StringEventChannel cleardTimeTextEventChannel;//带string参数的频道

在过关函数触发时，调用并且将ui上的timeText数据传入StringEventChannel。

void levelCleared()
{//过关
  HideUI();
  cleardTimeTextEventChannel.Broadcast(timeText.text);
}