UIPickerView鬼图像

Question

我想在我的swift代码中使用一个选择器视图，我幸运地运行。但是每次我加载程序时，我的选择器视图都会创建一个自己的鬼影。为什么会发生？我是否需要对我的代码进行任何调整？

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

您是否尝试过清理你的项目？ cmd + shift + k，如果这不起作用，请尝试从模拟器中删除您的应用程序，然后尝试再次运行它。