Lua菜单树遍历：深层结构的递归下探

-- 错误：写死两层循环，第三层永远缺失
for _, g in ipairs(menu) do
    addItem(g.label, 0)
    for _, s in ipairs(g.children or {}) do
        addItem(s.label, 1)
    end
end

local function renderNode(node, depth)
    addItem(node.label, depth)
    for _, child in ipairs(node.children or {}) do
        renderNode(child, depth + 1)
    end
end
local MENU = {
    label = "设置", children = {
        {label = "画面", children = {
            {label = "分辨率"},
        }},
        {label = "声音"},
    },
}
renderNode(MENU, 0)