Question

我试图展示＆＃34; man＆＃34;和＃34;女人＆＃34;但是得到了＃sigabrt＆＃34;。有人请帮我解决我的问题

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate {

    @IBOutlet weak var pkvTest: UIPickerView!

    var a : [String] = [String]()

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        a = ["man", "woman"]
    }

    func numberOfComponentsInPickerView(pickerView : UIPickerView) -> Int {
        return 1
    }

    func pickerView(pickerView : UIPickerView, numberOfRowsInComponent component : Int) -> Int {
        return a.count
    }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return a[row]
    }

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


}

Answer 1

您的前两个选择器视图功能名称错误。原因是您忘记将视图控制器声明为采用UIPickerViewDataSource。一旦你这样做，编译器就会唤醒问题并提醒你。

Answer 2

试试这个。看起来你错过了viewdidload中的委托和数据源

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDatasource {

@IBOutlet weak var pkvTest: UIPickerView!

var a : [String] = [String]()

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

self.pkvTest.delegate = self
self.pkvTest.datasource = self

    a = ["man", "woman"]
}

关于Picker View的错误

2 个答案: