swift - 在 UIPickerView 和 UIDatePicker for Swift 中选择第一行或任何带有完成按钮的行

Question

我有一个带有 4 个 UITextField 的 ViewController。前 3 个由它们自己的 UIPickerViews 填充，第 4 个由 UIDatePicker 填充。

我希望完成按钮能够选择每个选择器的第一行，或者如果不是第一行则选择任何被选中的行。

下面是适用于第一个 UIPicker 的代码。从 Selecting first row in UIPickerView issue 得到的.

func doneButton(sender: AnyObject) {
    let row = pickerView1.selectedRow(inComponent: 0);
    pickerView(pickerView1, didSelectRow: row, inComponent:0)
    view.endEditing(true)
}

如何让完成按钮对所有 4 个选择器独立工作？

这是完整的代码。

非常感谢任何帮助。

var selectedItemsArray = [String]()

class RunInputViewController: UIViewController, UITextFieldDelegate, UIPickerViewDataSource, UIPickerViewDelegate{

var pickerView1 = UIPickerView()
var pickerView2 = UIPickerView()
var pickerView3 = UIPickerView()
var pickerView4 = UIDatePicker()

@IBOutlet weak var runTypeTextField: UITextField!
@IBOutlet var runTextField: UITextField!
@IBOutlet var snowTypeTextField: UITextField!
@IBOutlet var dateTextField: UITextField!


@IBAction func saveRun(_ sender: Any){
    if (runTypeTextField.text != ""){
    runFeedList.append(runTypeTextField.text!)
        runTypeTextField.text = ""
    }
}

override func viewDidLoad() {
    super.viewDidLoad()
    createToolbar()

    pickerView1 = UIPickerView()
    pickerView2 = UIPickerView()
    pickerView3 = UIPickerView()
    pickerView4 = UIDatePicker()

    pickerView1.delegate = self
    pickerView1.dataSource = self

    pickerView2.delegate = self
    pickerView2.dataSource = self

    pickerView3.delegate = self
    pickerView3.dataSource = self


    pickerView1.tag = 0
    pickerView2.tag = 1
    pickerView3.tag = 2
    pickerView4.tag = 3

    self.runTypeTextField.inputView = self.pickerView1;
    self.runTextField.inputView = self.pickerView2;
    self.snowTypeTextField.inputView = self.pickerView3;
    self.dateTextField.inputView = self.pickerView4;

    pickerView4.addTarget(self, action: #selector(datePickerValueChanged(sender:)), for: .valueChanged)

    pickerView4.datePickerMode = UIDatePickerMode.time
    //let currentDate = NSDate()
    //pickerView4.minimumDate = currentDate as Date
    //pickerView4.date = currentDate as Date

    pickerView4.timeZone = NSTimeZone.local
    pickerView4.minuteInterval = 5
}



func createToolbar() {

    let toolBar = UIToolbar()
    toolBar.sizeToFit()

    //Customizations
    toolBar.barTintColor = .black
    toolBar.tintColor = .white

    let doneButton = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(RunInputViewController.doneButton(sender:)))

    toolBar.setItems([doneButton], animated: false)
    toolBar.isUserInteractionEnabled = true

    runTypeTextField.inputAccessoryView = toolBar
    runTextField.inputAccessoryView = toolBar
    snowTypeTextField.inputAccessoryView = toolBar
    dateTextField.inputAccessoryView = toolBar
}

func doneButton(sender: AnyObject) {

    let row = pickerView1.selectedRow(inComponent: 0);
    pickerView(pickerView1, didSelectRow: row, inComponent:0)
    view.endEditing(true)
}

func dismissKeyboard() {
    view.endEditing(true)
}

func datePickerValueChanged(sender:UIDatePicker) {
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "HH:mm"
    pickerView4.datePickerMode = UIDatePickerMode.time
    dateTextField.text = dateFormatter.string(from: sender.date)
}


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

 func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {

    if pickerView.tag == 0 {
        return runType.count
    } else if pickerView.tag == 1 {
        return selectedItemsArray.count
    } else if pickerView.tag == 2 {
        return snowType.count
    }
    return 1

}

 func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {

if pickerView.tag == 0 {
    return runType[row]
} else if pickerView.tag == 1 {
    return selectedItemsArray[row]
} else if pickerView.tag == 2 {
    return snowType[row]
}

return ""

}


var selectedRow: Int = 0

func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int)  {

    selectedRow = row

    if pickerView == pickerView1 {
        runTypeTextField.text = runType[row]
        switch row {
        case 0:
            selectedItemsArray = RunGreen
        case 1:
            selectedItemsArray = RunBlue
        case 2:
            selectedItemsArray = RunBlack
        case 3:
            selectedItemsArray = RunDoubleBlack

        default:
            selectedItemsArray = []
        }
        pickerView2.reloadAllComponents()

    } else if pickerView == pickerView2 {
        let item = selectedItemsArray[row]
        if selectedItemsArray == rRunGreen {
            runTextField.text = item
        } else if selectedItemsArray == RunBlue {
            runTextField.text = item
        } else if selectedItemsArray == rRunBlack {
            runTextField.text = item
        } else if selectedItemsArray == RunDoubleBlack {
            runTextField.text = item
        }
    }
        if pickerView.tag == 2 {
        snowTypeTextField.text = snowType[row]
    }
}
}

Answer 1

检查此代码与两个具有不同数组输入的选择器和一个日期选择器一起工作

import UIKit

class PickerViewController: UIViewController,UIPickerViewDataSource, UIPickerViewDelegate {
    @IBOutlet weak var pickerVieww: UIPickerView!

    @IBOutlet weak var DateePicker: UIDatePicker!
    @IBOutlet weak var newPickr: UIPickerView!
    var viewControllerArray = [String]()
    var viewControllerArray1 = [String]()
    var value = Int()
    var value1 = Int()

    override func viewDidLoad() {
        super.viewDidLoad()
        pickerVieww.delegate = self
        pickerVieww.dataSource = self
        newPickr.delegate = self
        newPickr.dataSource = self
        pickerVieww.tag = 1
        newPickr.tag = 2
        viewControllerArray = ["controller1","controller2","controller3"]
        viewControllerArray1 = ["controller4","controller5","controller6","controller7"]
    }
    func numberOfComponents(in pickerView: UIPickerView) -> Int {

        return 1
    }
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        if pickerView == pickerVieww
        {
            return viewControllerArray.count
        }
        else if pickerView == newPickr
        {
            return viewControllerArray1.count
        }
        return 0
    }
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        if pickerView == pickerVieww
        {
            return viewControllerArray[row]
        }
        else if pickerView == newPickr
        {
            return viewControllerArray1[row]
        }

        return ""
    }
    func pickerView(_ pickerView: UIPickerView,didSelectRow row: Int,inComponent component: Int)
    {


    }
    @IBAction func DoneButton(_ sender: Any) {

        let row = pickerVieww.selectedRow(inComponent: 0);
       print("pickervieww value: \(row)")

        let row1 = newPickr.selectedRow(inComponent: 0);
        print("newpicker value: \(row1)")

        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "dd MMM yyyy"
        let date:String = dateFormatter.string(from: DateePicker.date)
        print("date: \(date)")

    }

}

按钮操作上的控制台输出