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事件系统在开发中必不可少事件系统使用观察者模式可以极大程度降低程序的耦合#xff0c;之前的文章也讲过事件系统但是不够高效简洁#xff0c;如何轻便高效优雅的实现一个事件呢#xff1f;依然基于之前的AssemblyManager 程序集管理器和SingletonS…EventSystem 事件系统
事件系统在开发中必不可少事件系统使用观察者模式可以极大程度降低程序的耦合之前的文章也讲过事件系统但是不够高效简洁如何轻便高效优雅的实现一个事件呢依然基于之前的AssemblyManager 程序集管理器和SingletonSystem 单例管理系统进行开发主要原理也是根据反射去获取事件的接口使用反射进行实例化处理类而非人工手动订阅事件。
1.IEvent
public interface IEvent
{Type GetEventType();void Invoke(object self);
}2.EventHandler
public abstract class EventHandlerT : IEvent where T : struct
{private readonly Type _selfType typeof(T);public Type GetEventType(){return _selfType;}public abstract void Handler(T eventStruct);public void Invoke(object self){try{Handler((T)self);}catch (Exception ex){Debug.LogError(${_selfType.Name} Error : {ex.Message});return;}}
}3.EventInfo
public sealed class EventInfo
{public readonly Type Type;public readonly IEvent Event;public EventInfo(Type type, IEvent event){Type type;Event event;}
}4.EventSystem
public class EventSystem : SingletonEventSystem
{private readonly OneToManyListType, IEvent _events new();private readonly OneToManyListint, EventInfo _assemblyEvents new();protected override void Load(int assemblyName){foreach (Type type in AssemblyManager.ForEach(assemblyName, typeof(IEvent))){IEvent event (IEvent)Activator.CreateInstance(type);if (event ! null){Type thisType event.GetEventType();_events.Add(thisType, event);_assemblyEvents.Add(assemblyName, new EventInfo(thisType, event));}}}protected override void UnLoad(int assemblyName){if(_assemblyEvents.TryGetValue(assemblyName,out ListEventInfo events)){foreach (EventInfo info in events){_events.RemoveValue(info.Type, info.Event);}_assemblyEvents.RemoveByKey(assemblyName);}}public void PublishTEventData(TEventData eventData) where TEventData : struct{if (!_events.TryGetValue(eventData.GetType(), out ListIEvent list))return;foreach (IEvent event in list){try{event?.Invoke(eventData);}catch (Exception ex){Debug.LogError(ex.Message);return;}}}public override void Dispose(){_events.Clear();_assemblyEvents.Clear();base.Dispose();}
}这里的每个事件传递的参数可以使用引用池进行管理避免重复创建相同的对象消耗性能。
5.测试
public class Test : MonoBehaviour
{void Start(){SingletonSystem.Initialize();AssemblyManager.Initialize();}private void Update(){SingletonSystem.Update();if (Input.GetKeyDown(KeyCode.P)){EventSystem.Instance.PublishAgeEvent(new AgeEvent() { Age 18 });}}
}public struct AgeEvent
{public int Age;
}public class AgeChangeHandler : EventHandlerAgeEvent
{public override void Handler(AgeEvent eventStruct){Debug.Log(eventStruct.Age);}
}
