遍历类中的对象

我从一个类中创建对象，想要以后迭代它们。有比这更有效的方法吗？

class1 = {}
class1.value1 = "1"
class1.value2 = 2
class1.tvalue1 = {}

function class1:new()
    local class = self
    local object = {}
    setmetatable(object,class)
    class.__index = class
    object.tvalue1 = {}
    table.insert(objects, object)  -- to iterate them later, stupid way I think
    return object
end
function class1:alterValue1(input)
    self.value1 = input
    return self.value1
end
function class1:alterValue2(input)
    self.value2 = input
    return self.value2
end

randomName = class1:new()
otherName  = class1:new()
weirdoName = class1:new()
.
.
.
(n)

在构造函数中将它们插入某种对象表中是否有更有效的迭代对象的方法？