摘要: //: Playground - noun: a place where people can play import UIKit var str = "Hello, playground" //字符串 //空字符串 var emptyString = "" var emptyString2 = S 阅读全文
posted @ 2016-11-02 11:40 一枚IT女 阅读(260) 评论(0) 推荐(0) 编辑