Lua键序输出：字典表的可预期遍历

-- 错误：pairs 直接渲染，顺序每次漂移
for k, v in pairs(cfg) do
    renderRow(k, v)
end

local cfg = {hp = 100, atk = 30, def = 12}
local keys = {}
for k in pairs(cfg) do
    keys[#keys + 1] = k
end
table.sort(keys)
for _, k in ipairs(keys) do
    renderRow(k, cfg[k])
end
local label = panel:getChildByName("cfgOrder")
label:setString(table.concat(keys, ","))