Swift - AnyObject与Any的区别

最新推荐文章于 2025-09-11 10:14:45 发布

转载最新推荐文章于 2025-09-11 10:14:45 发布 · 43 阅读

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原文链接：http://www.cnblogs.com/Free-Thinker/p/4838439.html

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#swift

1，AnyObject ：代表任何class类型的对象实例。

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。

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")
    }
}