UIPickerView Swift

If screen has multiply fields, that user should act with, then, in my opinion, it’s better to put label + button above it and when user press this button you just shows Picker View from screen bottom. When user select any row in Picker View you change label text, but don't hide picker itself,

First set delegate

UIPickerViewDataSource,UIPickerViewDelegate

set IBOutlet for UIPickerView

@IBOutlet weak var pickerView: UIPickerView!

Take an array for data

var arrayFruits = [String]()

Write this code on viewDidLoad()

arrayFruits = ["Apple","Banana","Orange","Grapes","Watermelon"]
  self.pickerView.dataSource = self
  self.pickerView.delegate = self

Write picker view delegate methods:

//MARK: - Pickerview method
func numberOfComponents(in pickerView: UIPickerView) -> Int {
    return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
    return arrayFruits.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
    return arrayFruits[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
    self.labelFruit.text = arrayFruits[row]