使用[弱]防止模型中的内存泄漏无法通过swift工作

Question

我对内存泄漏有疑问 我想释放记忆，使用[弱自我]，但似乎无法释放 如何释放记忆成功？

代码：

class City:NSObject {
    let notifySubject = PublishSubject<Any>()

    var id:String = ""
    @objc var name:String = ""
    var kind:String = ""
    var userId:String = ""
    var country:String = ""
    var subject:String = ""
    var descriptions:String = ""
    var cities:[City] = [City]()

    override init() {
        super.init()
    }

    init(_ id:String) {
        super.init()
        self.id = id
    }

    func getData() {

        API.Data.get({ json in

            json.forEach({ [weak self] (index, data) in
                self?.cities.append(City(data))
            })
            self.fromJson(json)
            self.notifySubject.onNext(json)
        })
    }

}