创建一个元组

let myInfo = ("lxd",26)
print(myInfo.0) //输出lxd
print(myInfo.1) //输出26

给元组中元素起别名

let myInfo1 = (myName : "lxd", myAge: 26)
print(myInfo1. myName) //输出lxd
print(myInfo1. myAge) //输出26

直接定义标示符为别名

let (myName, myAge) = ("lxd",26)
print(myName) //输出lxd
print(myAge) //输出26

其他应用场景

let errorInfo = (errorCode : 404, errorMsg: "Not Found")
errorInfo.errorCode
errorInfo.errorMsg