ios - 为什么相同的代码不能在标签栏控制器的多个实例上运行？

Question

我正在构建一个天气应用程序，它将使用标签栏控制器来显示不同的天气数据集。每个标签栏视图都有一个表格视图，其中填充了来自我的网站的天气信息单元格。第一个视图（1/3）正常工作。所以我复制了代码，更改了命名约定并尝试创建第二个视图。但是，即使一切都相同，第二个视图也没有填充信息。

这是有效的部分：

    class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

//  getTemperData()
// getWindData()
//  getRainData()
@IBOutlet var table: UITableView!
var models = [TemperatureDataModel]()

override func viewDidLoad() {
    super.viewDidLoad()

    
    //Register cells
    table.register(WeatherTableViewCell.nib(), forCellReuseIdentifier: WeatherTableViewCell.identifier)
    
    table.delegate = self
    table.dataSource = self
    getTemperData()
}

override func viewDidAppear(_ animated: Bool){
    super.viewDidAppear(animated)
}

//Tables
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return models.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: WeatherTableViewCell.identifier, for: indexPath) as! WeatherTableViewCell
    cell.configure(with: models[indexPath.row])
    return cell
    }


func getTemperData(){
    //Create the URLs
    let temperatureDataUrl = URL(string: "https://weatherstationapi.azurewebsites.net/api/TemperatureSensor/GetData")
    guard let requestURLTemp = temperatureDataUrl else {fatalError()}
    
    //Create URL request
    var request = URLRequest(url: requestURLTemp)
    //Specifiy HTTP Method to use
    request.httpMethod = "GET"
    request.setValue("application/json", forHTTPHeaderField: "Accept")
    request.setValue("Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJodHRwOi8vc2NoZW1hcy54bWxzb2FwLm9yZy93cy8yMDA1LzA1L2lkZW50aXR5L2NsYWltcy9uYW1lIjoiaWxpci50YWlyaUB0dHUuZWR1IiwiaHR0cDovL3NjaGVtYXMueG1sc29hcC5vcmcvd3MvMjAwNS8wNS9pZGVudGl0eS9jbGFpbXMvbmFtZWlkZW50aWZpZXIiOiI4MjEzYzhhMy1iODgxLTQ4NmUtOGUyMC1mZmNlMDlmNGY0ZjgiLCJuYmYiOiIxNjA1MTE4NDA4IiwiZXhwIjoiMTYzNjY1NDQwOCJ9.HmLCUwnB5Esbao5NDmjflooHcdQK1BWjy1lk6LIKiJg", forHTTPHeaderField: "Authorization")
    
    //Send HTTP Request
    let task = URLSession.shared.dataTask(with: request){(data, response, error) in
        guard let data = data else {print("did not get data")
            return
        }
        do
        {
            let decoder = JSONDecoder()
            decoder.keyDecodingStrategy = .convertFromSnakeCase
            let TemperatureData = try decoder.decode([TemperatureDataModel].self, from: data)
            for singleValue in TemperatureData {
                print(singleValue.temperature)
                self.models.append(singleValue)
                DispatchQueue.main.async {
                    self.table.reloadData()
                }
            }
        } catch {
            print("JSONDecoder error:", error)
        }

    };task.resume()

}

}

这部分基本相同但不起作用：

    class TempAndHumidityController: UIViewController, UITableViewDelegate, UITableViewDataSource {

@IBOutlet var windtable: UITableView!
var Windmodels = [WindDataModel]()

override func viewDidLoad() {
    super.viewDidLoad()

    //Register cells
    windtable.register(WindTableViewCell.nib(), forCellReuseIdentifier: WindTableViewCell.identifier)
    
    windtable.delegate = self
    windtable.dataSource = self
    getWindData()
}

override func viewDidAppear(_ animated: Bool){
    super.viewDidAppear(animated)
}

//Tables
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return Windmodels.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let windcell = tableView.dequeueReusableCell(withIdentifier: WindTableViewCell.identifier, for: indexPath) as! WindTableViewCell
    windcell.configure(with: Windmodels[indexPath.row])
    return windcell
}


func getWindData(){
    //Create the URLs
    let WindDataUrl = URL(string: "https://weatherstationapi.azurewebsites.net/api/WindData/GetAllData")
    //Create URL requests
    guard let requestURLWind = WindDataUrl else {fatalError()}
    var requestWind = URLRequest(url: requestURLWind)
    //Request for Wind data
    requestWind.httpMethod = "GET"
    requestWind.setValue("application/json", forHTTPHeaderField: "Accept")
    requestWind.setValue("Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJodHRwOi8vc2NoZW1hcy54bWxzb2FwLm9yZy93cy8yMDA1LzA1L2lkZW50aXR5L2NsYWltcy9uYW1lIjoiaWxpci50YWlyaUB0dHUuZWR1IiwiaHR0cDovL3NjaGVtYXMueG1sc29hcC5vcmcvd3MvMjAwNS8wNS9pZGVudGl0eS9jbGFpbXMvbmFtZWlkZW50aWZpZXIiOiI4MjEzYzhhMy1iODgxLTQ4NmUtOGUyMC1mZmNlMDlmNGY0ZjgiLCJuYmYiOiIxNjA1MTE4NDA4IiwiZXhwIjoiMTYzNjY1NDQwOCJ9.HmLCUwnB5Esbao5NDmjflooHcdQK1BWjy1lk6LIKiJg", forHTTPHeaderField: "Authorization")
    
    
    //Send HTTP Request
    let task = URLSession.shared.dataTask(with: requestWind){(data, response, error) in
        guard let data = data else {return}
        
        do
        {
            let decoder = JSONDecoder()
          //  decoder.keyDecodingStrategy = .convertFromSnakeCase
            let WindData = try decoder.decode([WindDataModel].self, from: data)
            for singleValue in WindData {
                print("Wind Speed:  \(singleValue.windSpeed_MPH)")
                print("Wind Direction:  \(singleValue.windDirection)")
                self.Windmodels.append(singleValue)
                DispatchQueue.main.async {
                    self.windtable.reloadData()
                }
            }
            
            //print("Temperature Data:", TemperatureData)
        } catch {
            print("JSONDecoder error:", error)
        }
    };task.resume()
    
}

     }

单元格的 .xib 都已正确链接。使用断点进行故障排除时，第二类获取 HTTP 请求，但未填充数据。因此，当我在 cell.configure.... （第一类）设置断点时，它会遍历并填充 .xib 的每个条目。但是在第二类中它甚至没有得到配置功能。这是有效的配置功能

    func configure(with model: TemperatureDataModel){
    self.TempLabel.text = "\(Int(model.temperature))°"
    self.HumidityLabel.text = "\(Int(model.humidity))%"
    self.dayLabel.text = "\(String(model.timeCaptured))"
    if #available(iOS 13.0, *) {
        self.iconImageView.image = UIImage(systemName: "sun.max")
    } else {
        // Fallback on earlier versions
    }

这是未达到的配置功能

    func configure(with model: WindDataModel){
    self.KnotsLabel.text = "\(Int(model.windSpeed_Knots))"
    self.MPHLabel.text = "\(Int(model.windSpeed_MPH))"
    self.DirectionLabel.text = "\(String(model.windDirection))"
    if #available(iOS 13.0, *) {
        self.iconImageView.image = UIImage(systemName: "wind")
    } else {
        // Fallback on earlier versions
    }
}

有任何想法吗？

标签： iosswift