二、lua点和冒号区别

看程序的时候，经常看到点和冒号用来调用function.虽然知道什么含义.但还是记录一下

点的例子:

local CandyCrashItem = {}
CandyCrashItem.__index = CandyCrashItem
function CandyCrashItem.printNum(num)
    print(num)
end
CandyCrashItem.printNum(1)

结果:1

冒号的例子:

local CandyCrashItem = {}
CandyCrashItem.__index = CandyCrashItem
function CandyCrashItem:printNum(num) print(num) end CandyCrashItem:printNum(1)

结果:1

点调用冒号的方法:

local CandyCrashItem = {}
CandyCrashItem.__index = CandyCrashItem
function CandyCrashItem:printNum(num)
    print(num)
end
CandyCrashItem.printNum(CandyCrashItem,1)

结果:1

点调用冒号方法错误例子:

local CandyCrashItem = {}
CandyCrashItem.__index = CandyCrashItem
function CandyCrashItem:printNum(num)
    print(num)
end
CandyCrashItem.printNum(1,CandyCrashItem)

结果:table: 0x7fa222f04f50

结论:
冒号方法是对点方法的封装

:function(x)=.function(self,x)