简要分析Unity计时器脚本Timer的用法（附代码）

Timer用法：第一种：脚本加到物体上，勾选"自动计时"。第二种：脚本加到物体上，调用timer.start()方法启动。第三种：代码中动态添加Timer脚本。

using UnityEngine;  public class TimerTest : MonoBehaviour {      private void Start () {         // 创建一个Timer并开始计时         gameObject.AddComponent<Timer>().start(1.5f, onTimeup);          // 倒计时3秒         gameObject.AddComponent<Timer>().start(1, 3, onCD, onCDEnd);          // 无限计数(repeatCount为<=0时 无限重复)         gameObject.AddComponent<Timer>().start(1, -1, onCount, null);          // Timer API         Timer timer = gameObject.AddComponent<Timer>();         timer.delay = 10;// 延迟10秒开始         timer.start();  // 开始计时         timer.stop();   // 暂停计时         timer.reset();  // 重置已计时的时间和次数         timer.restart();// 重新开始计时 reset() + start()     }      /// <summary> 正常计时 </summary>     private void onTimeup(Timer timer) {         print("计时完成");     }      /// <summary> 倒计时间隔 </summary>     private void onCD(Timer timer) {         print(timer.repeatCount - timer.currentCount); // 3, 2, 1     }      /// <summary> 倒计时结束 </summary>     private void onCDEnd(Timer timer) {         print(timer.repeatCount - timer.currentCount); // 0     }      /// <summary> 无限计数 </summary>     private void onCount(Timer timer) {         print(timer.currentCount); // 1, 2, 3……     }  }

Timer API：

// 开始/继续计时 public void start() {}  // 暂停计时 public void stop() {}  // 停止Timer并重置数据 public void reset() {}  // 重置数据并重新开始计时 public void restart() {}  // 开始计时 time时间(秒) onComplete(Timer timer)计时完成回调事件 public void start(float time, TimerCallback onComplete) {}  // 开始计时 interval计时间隔 repeatCount重复次数 onComplete(Timer timer)计时完成回调事件 public void start(float interval, int repeatCount, TimerCallback onComplete) {}  // 开始计时 interval计时间隔 repeatCount重复次数 // onInterval(Timer timer)计时间隔回调事件 // onComplete(Timer timer)计时完成回调事件 public void start(float interval, int repeatCount, TimerCallback onInterval, TimerCallback onComplete) {}

Timer.cs

using UnityEngine; using UnityEngine.Events;  /// <summary> /// 计时器 /// <para>ZhangYu 2018-04-08</para> /// </summary> public class Timer : MonoBehaviour {      // 延迟时间(秒)     public float delay = 0;     // 间隔时间(秒)     public float interval = 1;     // 重复次数     public int repeatCount = 1;     // 自动计时     public bool autoStart = false;     // 自动销毁     public bool autoDestory = true;     // 当前时间     public float currentTime = 0;     // 当前次数     public int currentCount = 0;     // 计时间隔     public UnityEvent onIntervalEvent;     // 计时完成     public UnityEvent onCompleteEvent;     // 回调事件代理     public delegate void TimerCallback(Timer timer);     // 上一次间隔时间     private float lastTime = 0;     // 计时间隔     private TimerCallback onIntervalCall;     // 计时结束     private TimerCallback onCompleteCall;      private void Start () {         enabled = autoStart;     }      private void FixedUpdate () {         if (!enabled) return;         addInterval(Time.deltaTime);     }      /// <summary> 增加间隔时间 </summary>     private void addInterval(float deltaTime) {         currentTime += deltaTime;         if (currentTime < delay) return;         if (currentTime - lastTime >= interval) {             currentCount++;             lastTime = currentTime;             if (repeatCount <= 0) {                 // 无限重复                 if (currentCount == int.MaxValue) reset();                 if (onIntervalCall != null) onIntervalCall(this);                 if (onIntervalEvent != null) onIntervalEvent.Invoke();             } else {                 if (currentCount < repeatCount) {                     //计时间隔                     if (onIntervalCall != null) onIntervalCall(this);                     if (onIntervalEvent != null) onIntervalEvent.Invoke();                 } else {                     //计时结束                     stop();                     if (onCompleteCall != null) onCompleteCall(this);                     if (onCompleteEvent != null) onCompleteEvent.Invoke();                     if (autoDestory && !enabled) Destroy(this);                 }             }          }     }      /// <summary> 开始/继续计时 </summary>     public void start() {         enabled = autoStart = true;     }      /// <summary> 开始计时 </summary>     /// <param name="time">时间(秒)</param>     /// <param name="onComplete(Timer timer)">计时完成回调事件</param>     public void start(float time, TimerCallback onComplete) {         start(time, 1, null, onComplete);     }      /// <summary> 开始计时 </summary>     /// <param name="interval">计时间隔</param>     /// <param name="repeatCount">重复次数</param>     /// <param name="onComplete(Timer timer)">计时完成回调事件</param>     public void start(float interval, int repeatCount, TimerCallback onComplete) {         start(interval, repeatCount, null, onComplete);     }      /// <summary> 开始计时 </summary>     /// <param name="interval">计时间隔</param>     /// <param name="repeatCount">重复次数</param>     /// <param name="onInterval(Timer timer)">计时间隔回调事件</param>     /// <param name="onComplete(Timer timer)">计时完成回调事件</param>     public void start(float interval, int repeatCount, TimerCallback onInterval, TimerCallback onComplete) {         this.interval = interval;         this.repeatCount = repeatCount;         onIntervalCall = onInterval;         onCompleteCall = onComplete;         reset();         enabled = autoStart = true;     }      /// <summary> 暂停计时 </summary>     public void stop() {         enabled = autoStart = false;     }      /// <summary> 停止Timer并重置数据 </summary>     public void reset(){         lastTime = currentTime = currentCount = 0;     }      /// <summary> 重置数据并重新开始计时 </summary>     public void restart() {         reset();         start();     }  }

TimerEditor.cs

using UnityEditor; using UnityEngine;  /// <summary> /// 计时器 编辑器 /// <para>ZhangYu 2018-04-08</para> /// </summary> [CanEditMultipleObjects] [CustomEditor(typeof(Timer))] public class TimerEditor : Editor {      public override void OnInspectorGUI() {         Timer script = (Timer)target;          // 重绘GUI         EditorGUI.BeginChangeCheck();          // 公开属性         drawProperty("delay", "延迟时间(秒)");         drawProperty("interval", "间隔时间(秒)");         drawProperty("repeatCount", "重复次数");         if (script.repeatCount <= 0) EditorGUILayout.LabelField(" ", "<=0 时无限重复", GUILayout.ExpandWidth(true));         EditorGUILayout.BeginHorizontal();         drawProperty("autoStart", "自动计时");         drawProperty("autoDestory", "自动销毁");         EditorGUILayout.EndHorizontal();          // 只读属性         GUI.enabled = false;         drawProperty("currentTime", "当前时间(秒)");         drawProperty("currentCount", "当前次数");         GUI.enabled = true;          // 回调事件         drawProperty("onIntervalEvent", "计时间隔事件");         drawProperty("onCompleteEvent", "计时完成事件");         if (EditorGUI.EndChangeCheck()) serializedObject.ApplyModifiedProperties();     }      private void drawProperty(string property, string label) {         EditorGUILayout.PropertyField(serializedObject.FindProperty(property), new GUIContent(label), true);     }  }

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