53 lines
1.3 KiB
Lua
53 lines
1.3 KiB
Lua
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local Emitter = {
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EventHandlers = {}
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}
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-- 注册事件监听
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function Emitter.OnEvent(eventName, handler)
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if not eventName or type(handler) ~= "function" then
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print("[EventSystem] Invalid event registration")
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return
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end
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if not Emitter.EventHandlers[eventName] then
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Emitter.EventHandlers[eventName] = {}
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end
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table.insert(Emitter.EventHandlers[eventName], handler)
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return handler -- 返回handler用于注销
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end
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-- 触发事件
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function Emitter.EmitEvent(eventName, ...)
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local handlers = Emitter.EventHandlers[eventName]
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if not handlers then return end
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print("[EventSystem] Emitting event: " .. eventName)
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for i = #handlers, 1, -1 do -- 倒序遍历允许在回调中移除事件
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local success, err = pcall(handlers[i], ...)
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if not success then
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print("[EventSystem] Error in handler: " .. tostring(err))
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end
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end
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end
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-- 注销事件
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function Emitter.OffEvent(eventName, handler)
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local handlers = Emitter.EventHandlers[eventName]
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if not handlers then return end
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for i = #handlers, 1, -1 do
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if handlers[i] == handler then
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table.remove(handlers, i)
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end
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end
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if #handlers == 0 then
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Emitter.EventHandlers[eventName] = nil
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end
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end
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return Emitter
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