Swift - AnyObject与Any的区别

2015-04-10 发布：hangge 阅读：2578

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")
	}
}