Question

我正在尝试使用API自动填充文本字段（用于全局股票自动填充）。当用户点击文本字段并开始编辑时，将显示包含响应中所有数组值的表视图。当用户第一次编辑文本字段时，我能够填充表视图，但稍后表视图数据不会被更改。但我尝试打印我的数组，并且数组中的值根据UITextField中输入的字符串而变化。

var stockValues = [String]()
var getStockName:String = ""

override func viewDidLoad() {
    super.viewDidLoad()

    //Intialising myCustome Table View AutocompleteStocks

    AutocCompleteStocks.delegate = self
    AutocCompleteStocks.dataSource = self
    self.AutocCompleteStocks.register(UITableViewCell.self, forCellReuseIdentifier: "myCell")
    self.AutocCompleteStocks.isHidden = true


}


@IBOutlet var stocksAutocomplete: UITextField!


@IBOutlet var AutocCompleteStocks: UITableView!


//TableView Delegate Methods

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

    print("TejastockValues\(self.stockValues.count)")
    return self.stockValues.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "myCell")

    cell?.textLabel?.text = self.stockValues[indexPath.row]
    print("TejastockValues\(self.stockValues)")
    return cell!
}

@IBAction func buttonPressed(_ sender: AnyObject) {

}

@IBOutlet var stockEntryTextField: UITextField!

//Text Field when editing changes . I am storing the text value entered by user into getStockName variable

@IBAction func AutoCompleteTextField(_ sender: AnyObject) {




    self.AutocCompleteStocks.isHidden = false

    getStockName = stockEntryTextField.text!



    print("kichuuuuu\(getStockName)")


    //Calling web service

    Alamofire.request("http://search.xignite.com/Search/Suggest?parameter=XigniteGlobalQuotes.GetGlobalDelayedQuote.Identifier&term=\(getStockName)&tags=xnse").responseJSON{response in

        if let json = response.result.value as? [String:AnyObject]{

            if let results = json["Results"]{

                print(" \(results)")

                //looping through all the values

                for i in 0..<results.count{

                    let item = results[i] as! [String:AnyObject]

                    let value = item["Value"] as! String

                    self.stockValues.append(value)

                    self.AutocCompleteStocks.reloadData()
                    //reloading the tableview after appending values



                }
                print("TejastockValues\(self.stockValues)")

            }
        }
    }

    callingAutocomplete()

}


func callingAutocomplete(){                                

}

Answer 1

您不应该从后台线程重新加载tableView，始终在main线程上。

此外，由于您在向tableView附加值时正在重新加载stockValue，因此您可以重新加载tableView次，与您拥有的值一样多。但是，只有拥有所有项目后才能进行。

在for循环中执行以下操作：

for i in 0..<results.count {
     let item = results[i] as! [String:AnyObject]
     let value = item["Value"] as! String
     self.stockValues.append(value)  
}

DispatchQueue.main.async { [weak self] in
  //Reloading the tableview after ALL values appended.
  self?.AutocCompleteStocks.reloadData()
}

Answer 2

当UIText字段发生更改时，您正在将值附加到stockValues而不清除它。做点什么

在TextField事件更改中 stockValues = [“”]，然后它应该按预期工作。并且还在主线程上重新加载tableView，如Nirav D所示。

@IBAction func AutoCompleteTextField(_ sender: AnyObject) {




    self.AutocCompleteStocks.isHidden = false

    getStockName = stockEntryTextField.text!



    print("kichuuuuu\(getStockName)")


   //Calling web service

    Alamofire.request("http://search.xignite.com/Search/Suggest?parameter=XigniteGlobalQuotes.GetGlobalDelayedQuote.Identifier&term=\(getStockName)&tags=xnse").responseJSON{response in

        if let json = response.result.value as? [String:AnyObject]{

            if let results = json["Results"]{

                print(" \(results)")

               //looping through all the values

                for i in 0..<results.count{

                    let item = results[i] as! [String:AnyObject]

                    let value = item["Value"] as! String

                    let text = item["Text"] as! String

                    self.stockValues.append(text)


                    //reloading the tableview after appending values



                }
                self.AutocCompleteStocks.reloadData()
                print("TejastockValues\(self.stockValues)")

            }
        }
    }

    DispatchQueue.main.async{

        self.AutocCompleteStocks.reloadData()

    }
    stockValues = [""]

}

数组更改后无法在Tableview中重新加载数据？

2 个答案: