ios - 在一个 UIViewController 中的 UIPickerViews 之间切换的问题

Question

我有一个 UIViewController包含两个 UITextFields和两个应该填充 UIPickerViews 的 Picker 数组基于什么UITextField被选中。

当 UITextField pickerTextField选择了pickOption数组应该填充。当pickerTextField2选择了pickerOption2数组应该填充。

目前，当 pickerTextField或 pickerTextField2选择了相同的数组 pickerOption2正在为两者显示。

哪里写错了？

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource, UITextFieldDelegate {

    @IBOutlet weak var pickerTextField: UITextField!
    @IBOutlet weak var pickerTextField2: UITextField!
    var textField1: UITextField?
    var pickOption = ["one", "two", "three", "four", "five"]
    var pickOption2 = ["two", "four", "six", "eight", "ten"]

    let pickerView = UIPickerView()

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

    func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
        textField1 = textField
        pickerView.reloadAllComponents()
        pickerView.isHidden = false
        return true
    }



    override func viewDidLoad() {
        super.viewDidLoad()


        pickerView.delegate = self
        pickerTextField.delegate = self
        pickerTextField2.delegate = self
        pickerTextField.inputView = pickerView
        pickerTextField2.inputView = pickerView

        // Do any additional setup after loading the view, typically from a nib.

        // ToolBar
        let toolBar = UIToolbar()
        toolBar.barStyle = .default
        toolBar.isTranslucent = false
        toolBar.tintColor = UIColor(red:0.78, green:0.26, blue:0.26, alpha:1.0)
        toolBar.sizeToFit()

        // Adding Button ToolBar
        let doneButton = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(ViewController.doneClick))
        let spaceButton = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
        toolBar.setItems([spaceButton, doneButton], animated: true)
        toolBar.isUserInteractionEnabled = true
        pickerTextField.inputAccessoryView = toolBar
        pickerTextField2.inputAccessoryView = toolBar

    }

    @objc func doneClick() {
        self.view.endEditing(true)
    }

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

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

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        if textField1?.tag == 10 {
            return pickOption.count
        }
        return pickOption2.count
    }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        if textField1?.tag == 10 {
            return pickOption[row]
        }
        return pickOption2[row]
    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        if textField1?.tag == 10 {
            textField1?.text = pickOption[row]
            return
        }
        textField1?.text = pickOption2[row]

    }
}

Answer 1

我会使用两个选择器

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource, UITextFieldDelegate {

    @IBOutlet weak var pickerTextField: UITextField!
    @IBOutlet weak var pickerTextField2: UITextField!
    // var textField1: UITextField? - not needed
    var pickOption = ["one", "two", "three", "four", "five"]
    var pickOption2 = ["two", "four", "six", "eight", "ten"]

    let pickerView1 = UIPickerView()
    let pickerView2 = UIPickerView()

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

    // This should not be needed
    //func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
        // textField1 = textField
        // pickerView.reloadAllComponents()
        //pickerView.isHidden = false
        // return true
    // }

    override func viewDidLoad() {
        super.viewDidLoad()

        pickerView1.delegate = self
        pickerView2.delegate = self
        pickerTextField.delegate = self // This may not be needed anymore
        pickerTextField2.delegate = self // This may not be needed anymore
        pickerTextField.inputView = pickerView1
        pickerTextField2.inputView = pickerView2

        // Do any additional setup after loading the view, typically from a nib.

        // ToolBar
       //..... all your code

        // Adding Button ToolBar
        // ... more of your code

    }

    @objc func doneClick() {
        self.view.endEditing(true)
    }


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

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        if pickerView = pickerView1 {
            return pickOption.count
        }
        return pickOption2.count
    }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        if pickerView == pickerView1 {
            return pickOption[row]
        }
        return pickOption2[row]
    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        if pickerView == pickerView1 {
            pickerTextField.text = pickOption[row]
        } else {
            pickerTextField2.text = pickOption2[row]
        }
    }
}