Question

我知道这是一个常见问题，但我无法找到解决方案是否我搜索了几个小时，所以我决定打开一个新问题。我得到“[UIRefreshControl copyWithZone：]：无法识别的选择器发送到实例0x102029400”问题。当我第一次打开视图时。出现加载但它不符合表格。但是，当我检查模型类时，它从数据库中获取值。

在viewcontroller声明中;

 model.delegate = self
    model.refresh_history(sensor_name: send_item)
    // Set up a refresh control.
    mTableView.refreshControl = UIRefreshControl()
    mTableView.refreshControl?.addTarget(model, action: #selector(model.refresh_history), for: .valueChanged)

代表;

extension ChooseHistoryViewController: ModelDelegate {

    func modelUpdated() {
        mTableView.refreshControl?.endRefreshing()
        mTableView.reloadData()
    }

    func errorUpdating(_ error: NSError) {
        let message: String
        if error.code == 1 {
            message = "Error"
        } else {
            message = error.localizedDescription
        }
        let alertController = UIAlertController(title: nil,
                                                message: message,
                                                preferredStyle: .alert)

        alertController.addAction(UIAlertAction(title: "Dismiss", style: .default, handler: nil))

        present(alertController, animated: true, completion: nil)
    }
}

和我的模特课;

protocol ModelDelegate {
    func errorUpdating(_ error: NSError)
    func modelUpdated()
}
class Model{

    var user: User
    static let sharedInstance = Model()
    var sensor_ecg: Sensor_ECG?
    var delegate: ModelDelegate?
    var history: [String] = []

    init()
    {
        user = User()
    }
    @objc func refresh_history(sensor_name: String){
    let parameters: Parameters = ["q" : "{\"member_id\" :\"\(user.id!)\"}", "apiKey": "2ABdhQTy1GAWiwfvsKfJyeZVfrHeloQI"]

    Alamofire.request("https://api.mlab.com/api/1/databases/mysignal/collections/\(sensor_name)", method: .get, parameters: parameters,encoding: URLEncoding.default, headers: nil).responseJSON{ response in
        let json = JSON(data: response.data!)
        print(json)
        if(response.response == nil) {
            return
        }
        let history = json[0]["date"].string!
        print(history)

    }
    DispatchQueue.main.async {
        self.delegate?.modelUpdated()
    }
    }

Answer 1

您需要更改

如果您将方法声明为“refresh_history：”（即带参数），则需要在“#selector”位添加冒号。

换句话说，一行改变一个字符：

mTableView.refreshControl?.addTarget(model, action: #selector(model.refresh_history(sensor_name:)), for: .valueChanged)

Model类获取对象但不满足TableView

1 个答案: