zoukankan      html  css  js  c++  java
  • Swift

    1,AnyObject :代表任何class类型的对象实例。
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    class Man{
    }
     
    class Woman{
    }
     
    let man = Man()
    let woman = Woman()
    var arr:[AnyObject] = [man,woman]
     
    for people in arr {
        if let m = people as? Man {
            println("这是个男人")
        }else if let w = people as? Woman {
            println("这是个女人")
        }
    }

    2,Any :范围更广,代表除函数外任何类型的实例。
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    class Man{
    }
     
    class Woman{
    }
     
    var arr:[Any] = [Any]()
    arr.apppend(1)
    arr.append("hangge.com")
    arr.append(Man())
    arr.append(Woman())
     
    for any in arr {
        switch any {
            case let any as Int:
                println("这是个Int类型")
            case let any as String:
                println("这是个String类型")
            case let any as Man:
                println("这是个男人类型")
            case let any as Woman:
                println("这是个女人类型")
            default:
                println("这是个未知类型")
        }
    }
  • 相关阅读:
    css flex布局实现后台页面
    html5 css iframe实现后台框架,仅用于学习案例
    nginx 多个网站配置
    nginx 负载 访问时 去掉端口
    nginx 负载
    解标准数独算法
    C++ execute linux cmd and retrieve the output
    C++ generate in Ubuntu
    shell操作典型案例--FTP操作
    PHP7 新写法
  • 原文地址:https://www.cnblogs.com/Free-Thinker/p/4838439.html
Copyright © 2011-2022 走看看