Array.append更改以前添加的值 - swift 4.0

时间:2018-06-12 08:06:27

标签: arrays swift

我正在开发一个项目,该项目应使用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视图来按预期工作。

连接控制器:

    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)
    }

查看控制器:

    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追加到我的列表中以在CollectionView中显示时,列表项全部更改为最新的。我的意思是,所有以前添加的项目都与最新项目相同且相同。所以,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。

1 个答案:

答案 0 :(得分:0)

尝试以下:

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