dezhou_client/lua_probject/base_project/Game/View/Common/EventManager.lua

EventManager = {
    Language = 1
}

-- 兼容 Lua 5.1 和 5.2+
local unpack = unpack or table.unpack

function EventManager:Init()
    EventManager._events = {}
end

-- 注册事件监听器
function EventManager:EventAdd(eventName, callback)
    if not self._events[eventName] then
        self._events[eventName] = {}
    end

    -- 防止重复添加
    for _, listener in ipairs(self._events[eventName]) do
        if listener == callback then
            return false
        end
    end

    table.insert(self._events[eventName], callback)
    return true
end

-- 取消注册
function EventManager:EventRemove(eventName, callback)
    if not self._events[eventName] then
        return false
    end

    for i, listener in ipairs(self._events[eventName]) do
        if listener == callback then
            table.remove(self._events[eventName], i)
            return true
        end
    end

    return false
end

-- 触发事件（使用兼容的 unpack）
function EventManager:Call(eventName, ...)
    if not self._events[eventName] then
        return 0
    end

    local count = 0
    -- 使用兼容的 unpack 函数
    local listeners = { unpack(self._events[eventName]) }

    for _, callback in ipairs(listeners) do
        if type(callback) == "function" then
            local success, result = pcall(callback, ...)
            if not success then
                print("事件回调错误:", result)
            end
            count = count + 1
        end
    end

    return count
end

-- 替代方案：使用更安全的方式（推荐）
function EventManager:CallSafe(eventName, ...)
    if not self._events[eventName] then
        return 0
    end

    local count = 0
    -- 安全复制数组
    local listeners = {}
    for i, v in ipairs(self._events[eventName]) do
        listeners[i] = v
    end

    for _, callback in ipairs(listeners) do
        if type(callback) == "function" then
            local success, result = pcall(callback, ...)
            if not success then
                print("事件回调错误:", result)
            end
            count = count + 1
        end
    end

    return count
end

-- 清空事件
function EventManager:clear(eventName)
    if eventName then
        self._events[eventName] = nil
    else
        self._events = {}
    end
end

-- 获取监听器数量
function EventManager:getListenerCount(eventName)
    if not self._events[eventName] then
        return 0
    end
    return #self._events[eventName]
end