Swift：如何判断一个对象是否是某个类(或其子类)的实例

[obj  isKindOfClass:[obj class]];

class Person {

}

class AsiaMen: Person {

}

class ViewController: UIViewController {

override func viewDidLoad() {
super.viewDidLoad()

let person = AsiaMen()

var arr = [AnyObject]()
arr.append(person)
arr.append(self)

for obj in arr {
if obj is Person {
print("obj对象(\(obj.self)) 是Person类的实例")
}
}
}
}