--примерные данные кнопки
--код запускать на corona sdk старге 2 поколения
someJSON = [[{
        "type" : "Button",
        "parent" : "PerentControlName",
        "text" : "Кнопка 1",
        "name" : "Button1",
        "position" : {
            "x" : 100,
            "y" : 100
        },
        "on_click" : "onClickMethodName",
        "children" : ["path/to/first/child/element.json","path/to/last/child/element.json"]
        }]]

function CreateUIElement( data )

    local json = require( "json" ) -- подгружаем модуль жижсона
    local widget = require( "widget" ) -- либа для кнопок от coronaSDK (годный контент огромные возможности кастомизации )

    local decoded, pos, msg = json.decode( data ) -- создаем таблицу из жижсона

    if not decoded then -- отрабочик ошибок
        print( "Decode failed at " .. tostring(pos) .. ": " .. tostring(msg) )
    else

        newObj = {}

        newObj.type = decoded.type
        newObj.parent = decoded.parent

        newObj.children = {}

        for i,v in ipairs(decoded.children) do
            newObj.children[i] = v
        end

        local newObj = widget.newButton(
            {
                label = decoded.name,
                onEvent = decoded.on_click,
                emboss = false,
                shape = "roundedRect",
                width = 200,
                height = 40,
                cornerRadius = 2,
                fillColor = { default={1,0,0,1}, over={1,0.1,0.2,1} }
            }
        )

        newObj.x = decoded.position.x
        newObj.y = decoded.position.y

        newObj:setLabel( decoded.text )
    end
    return newObj
end

myBut = CreateUIElement( someJSON )