arrays - Array.append 更改之前添加的值 - swift 4.0

Question

我正在开发一个项目，该项目应该使用 GCD 同时从不同的服务器 URL 获取数据。它通过从服务器获取数据并更新 View 来按预期工作。

连接 Controller :

    private func initiateObjects() {
        self.stationCounter = 1
        self.request = StationRequests()
        self.object  = StationObject()
    }

    private func initiateRequests() {
        request = StationRequests(self.stationCounter)
        request.object = self.object
        request.delegate = self
    }

    private func sendRequest() {
        queueStation.async {
            self.request.SendRequest()
        }
    }

    private func updateView(_ obj: BaseObject?) {
        DispatchQueue.main.async {        
            NotificationCenter.default.post(name: .dataFetched, object: nil, userInfo: ["item": obj ?? BaseObject()])
        }
    }

    func managerDidReceived(data: Any, request: BaseRequest) {
        let parsedObj = request.object?.Parse(data)
        self.updateView(parsedObj)
    }

View Controller :

    override func viewDidLoad() {
        super.viewDidLoad()

        self.initiateStationListService()
    }

    private func initiateStationListService() {
        self.connection.initiate()
        NotificationCenter.default.addObserver(self, selector: #selector(self.dataFetched(_:)), name: .dataFetched, object: nil)
    }

    @objc func dataFetched(_ notification: Notification) {
        guard let items = notification.userInfo as? [String:StationObject] else { return }
        guard let item = items["item"] else { return }
        self.stationList.append(item) //HERE IS THE PROBLEM
        self.collectionView?.reloadData()
    }

问题是，当我想将获取的对象附加到我的列表以在 CollectionView 中显示时，列表项全部更改为最新的项。我的意思是，所有以前添加的项目都与最新的相同。因此，当我重新加载 CollectionView 时，所有记录都是相同的。加载的项目本身是正确的，没有问题。

Answer 1

尝试以下:

self.stationList += [item]
self.collectionView?.reloadData()