Lua 笔记

元表__index，以及闭包的调用结合使用

local newTable = {key1 = "value1"}
function newTable:cctv()
    local mt = {} 
    mt.__index = function (table,key)
        if(key == "key2") then
            return function (obj,...) return obj:createNewView(...) end
        end
        return nil
    end
    setmetatable(self,mt)
end 

function newTable:createNewView(...)
    local p = {...}
    print(p[1])
    return self.key1
end

newTable:cctv()
print(newTable.key2) --> 只是函数的打印
print(newTable:key2("123")) -->这才是对函数内部闭包的调用