Swift 2.0 Method无法标记为@objc,因为参数的类型无法在Objective-C中表示

我在此@L_944_1@的第一行收到以下错误：

@objc func personsToFirstStep(persons: [Person]) {
    for person in persons {
        if !self.persons.contains(person) && person.id != userID {
            self.persons.append(person)
        }
    }

    collectionView.reloadData()
    collectionViewPlaceholder.hidden = true
    collectionView.hidden = false
    collectionGradientView.hidden = false
}

这个Person类：

class Person: Hashable {

    var intID: Int = 0
    var id: String = ""
    var name: String = ""
    var type: String = ""

    var hashValue: Int {
        return self.intID
    }

    init(id: String,name: String,type: String) {
        self.id = id
        self.intID = Int(id)!
        self.name = name
        self.type = type
    }

}

func ==(lhs: Person,rhs: Person) -> Bool {
    return lhs.intID == rhs.intID
}