UIPickerView鬼圖像

Question

我想在我的swift代碼中使用一個選擇器視圖，我幸運地運行。但是每次我加載程序時，我的選擇器視圖都會創建一個自己的鬼影。爲什麼會發生？我是否需要對我的代碼進行任何調整？

import Foundation 
import UIKit 

class ViewTwo: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource { 

    @IBOutlet weak var pickerMenSplit: UIPickerView! 

    //var menPickerSplit: [String] = [String]() 
    var menPickerSplit = ["A", "B", "C", "D", "E"] 
    override func viewDidLoad() { 
     super.viewDidLoad() 
     // Do any additional setup after loading the view, typically from a nib. 

     //Connect Data: 
     pickerMenSplit.delegate = self 
     pickerMenSplit.dataSource = self 

     //Input data into the Array: 


    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 
    //the number of columns of data 
    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int { 
     return 1 
    } 

    //the number of rows of data 
    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { 
     return menPickerSplit.count 
    } 

    //the data to return for the row and component (column) that's being passed in 
    func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 
     return menPickerSplit[row] 
    } 

} 

Answer 1

您是否嘗試過清理你的項目？ cmd + shift + k，如果這不起作用，請嘗試從模擬器中刪除您的應用程序，然後嘗試再次運行它。