Swift - 表视图未填充数据但未显示错误

Question

使用以下教程，我尝试显示一些将填充到表格中的股票信息。我已经创建了表格视图控制器以及表格视图单元格，并将 stockTableViewCell 与表格视图单元格链接。但是我无法将主故事板上的 tableview 与自定义 table view 控制器链接。

基本上每次我尝试将它输入到自定义类字段时它都不适用，当我离开时它消失

我的问题是，我的视图控制器或表格视图单元是否有问题，或者我的情节提要中有什么配置错误？

教程：https://developer.apple.com/library/ios/referencelibrary/GettingStarted/DevelopiOSAppsSwift/Lesson7.html

表格视图控制器

import UIKit

class stocksTableViewController: UITableViewController{

    // Mark: Properties

    var stocks = [stockData]()
    let stock = stockinfo()

    override func viewDidLoad() {
        super.viewDidLoad()
        loadSampleStockData()

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func loadSampleStockData () {

        var stock1: stockData = stockData(name: "", askPrice: "", percentageChange: "", stockTicker: "")
        var stock2: stockData = stockData(name: "", askPrice: "", percentageChange: "", stockTicker: "")
        var stock3: stockData = stockData(name: "", askPrice: "", percentageChange: "", stockTicker: "")

        stock.getInfo("FB") {(name, price, change) in dispatch_async(dispatch_get_main_queue(),{
            stock1 = stockData(name: name, askPrice: price, percentageChange: change, stockTicker: "FB")})
        }

        stock.getInfo("MSFT") {(name, price, change) in dispatch_async(dispatch_get_main_queue(),{
            stock2 = stockData(name: name, askPrice: price, percentageChange: change, stockTicker: "MSFT")})
        }

        stock.getInfo("APPL") {(name, price, change) in dispatch_async(dispatch_get_main_queue(),{
            stock3 = stockData(name: name, askPrice: price, percentageChange: change, stockTicker: "APPL")})
        }

        stocks += [stock1, stock2, stock3]
    }

    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return stocks.count
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

        let cellIdentifier = "stockViewCell"

        let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! stockTableViewCell

        let stock = stocks[indexPath.row]

        cell.stockName.text = stock.name
        cell.stockPercentage.text = stock.percentageChange
        cell.stockDollarChange.text = stock.askPrice
        cell.stockTicker.text = stock.stockTicker

        return cell
    }
}

表格视图单元格

import Foundation
import UIKit

class stockTableViewCell: UITableViewCell {

    // Properties

    @IBOutlet weak var stockTicker: UILabel!
    @IBOutlet weak var stockPercentage: UILabel!
    @IBOutlet weak var stockName: UILabel!
    @IBOutlet weak var stockDollarChange: UILabel!

    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization Code
    }

    override func setSelected(selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)
        // Configure the view for the selected state
    }
}

Answer 1

您实际上需要在 viewDidLoad()

中注册您的 customtableviewcell

您还可以查看以下链接

http://www.mysamplecode.com/2013/06/ios-custom-uitableviewcell-example.html

Answer 2

如果不查看您的项目，不确定您遇到了什么问题，但您想在自定义类中输入什么？您应该输入 stockTableViewController 并且它应该可以工作，除非您没有在情节提要上拖入 TableViewController。而且您无需在 viewDidLoad 中注册您的单元格，请忽略该评论。

这里使用这个更新的代码，你正在尝试将两种类型的视图控制器设置为故事板上的一个视图，将此代码放入你的类 dashboardViewController 中，这应该会让你走上正确的轨道，不要忘记连接当您实现它时，此代码上的 tableView 属性的出口。

class dashboardViewController: DefaultViewController,     UITableViewDataSource, UITableViewDelegate {

  @IBOutlet weak var tableView: UITableView!
  @IBOutlet weak var balanceLabel: UILabel!

  var stocks = [stockData]()
  let stock = stockinfo()

      override func viewDidLoad() {
    super.viewDidLoad()
    tableView.delegate = self
    tableView.dataSource = self
    loadSampleStockData()
    user.newUser() // Move to login function when login and registration is implemented

//Sets the Balance Label on Dashboard
balanceLabel.text = "$" + String(format: "%.2f", user.getBalance())
  }

 func loadSampleStockData () {

var stock1: stockData = stockData(name: "", askPrice: "", percentageChange: "", stockTicker: "")
var stock2: stockData = stockData(name: "", askPrice: "", percentageChange: "", stockTicker: "")
var stock3: stockData = stockData(name: "", askPrice: "", percentageChange: "", stockTicker: "")

stock.getInfo("FB") {(name, price, change) in dispatch_async(dispatch_get_main_queue(),{
  stock1 = stockData(name: name, askPrice: price, percentageChange: change, stockTicker: "FB")})
    }

stock.getInfo("MSFT") {(name, price, change) in dispatch_async(dispatch_get_main_queue(),{
  stock2 = stockData(name: name, askPrice: price, percentageChange: change, stockTicker: "MSFT")})
}

stock.getInfo("APPL") {(name, price, change) in dispatch_async(dispatch_get_main_queue(),{
  stock3 = stockData(name: name, askPrice: price, percentageChange: change, stockTicker: "APPL")})
}

stocks += [stock1, stock2, stock3]
  }

  func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
 }

 func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
  return stocks.count
  }

  func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

let cellIdentifier = "stockViewCell"

let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! stockTableViewCell

let stock = stocks[indexPath.row]

cell.stockName.text = stock.name
cell.stockPercentage.text = stock.percentageChange
cell.stockDollarChange.text = stock.askPrice
cell.stockTicker.text = stock.stockTicker

return cell
    }`
  }

Answer 3

我看到了你的项目，我有几点可以帮助你：

1. 您的搜索字段没有出口。您插入了 UISearchDisplayController 但未与您的类 AddStockViewController 连接。
2. 最重要的UISearchDisplayerController 已弃用，请尝试使用 UISearchController 或 UISearchBar。

o/