UITextfield as float passed through segue to an UILabel - ios

Question

Im fairly new to swift and would like for a user to enter a number using the decimal pad for UITextfield to enter a float then pass that float to another view controller using a UILabel. Everything works except passing the float to the UILabel on the other view controller. I get this error
"Cannot assign value of type 'UITextField?' to type 'UILabel?'"
import UIKit
class SelectAttributesViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource, UITextFieldDelegate {
#IBOutlet weak var kitPickerView: UIPickerView!
#IBOutlet weak var reactionVolumeLabel: UILabel!
#IBOutlet weak var numberOfSampleTextField: UITextField!
#IBOutlet weak var volumeOfTemplateDNATextField: UITextField!
#IBOutlet weak var slider: UISlider!
#IBOutlet weak var calculateButton: UIButton!
let kits = ["kit 1", "Kit 2"]
let pArray = [10,20,50]
override func viewDidLoad() {
super.viewDidLoad()
self.numberOfSampleTextField.delegate = self
self.volumeOfTemplateDNATextField.delegate = self
kitPickerView.dataSource = self
kitPickerView.delegate = self
let tap = UITapGestureRecognizer(target: self.view, action: #selector(UIView.endEditing(_:)))
view.addGestureRecognizer(tap)
}
func pSliderInterval() {
slider.minimumValue = 0
slider.maximumValue = Float(pArray.count)
slider.isContinuous = false
}
#IBAction func reactionVolumeSlider(_ sender: UISlider) {
print(Int(sender.value))
let currentValue = pArray[Int(sender.value)]
reactionVolumeLabel.text = "\(currentValue) "
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return kits.count
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if row == 0{ print(kits[row])
}else if row == 1{
createAlert(title: "Kit not available", message: "More kits will be added soon!")
calculateButton.isEnabled = false
}
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return kits[row]
}
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
guard let oldText = textField.text, let r = Range(range, in: oldText) else {
return true
}
let newText = oldText.replacingCharacters(in: r, with: string)
let isNumeric = newText.isEmpty || (Double(newText) != nil)
let numberOfDots = newText.components(separatedBy: ".").count - 1
let numberOfDecimalDigits: Int
if let dotIndex = newText.firstIndex(of: ".") {
numberOfDecimalDigits = newText.distance(from: dotIndex, to: newText.endIndex) - 1
} else {
numberOfDecimalDigits = 0
}
return isNumeric && numberOfDots <= 1 && numberOfDecimalDigits <= 2
}
func createAlert (title: String, message: String){
let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertController.Style.alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertAction.Style.default, handler: { (Action) in
alert.dismiss(animated: true, completion: nil)
}))
self.present(alert, animated: true, completion: nil)
}
// This is the Segue.
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
var masterMix = segue.destination as! MasterMixTableViewController
masterMix.waterVolumeLabel = numberOfSampleTextField
}
#IBAction func calculatePressed(_ sender: Any) {
if numberOfSampleTextField.text != ""{
performSegue(withIdentifier: "masterMixSegue", sender: self)
}
}
}
I have browsed heavily for the solution but haven't found anything.

Answer 1

You need
let masterMix = segue.destination as! MasterMixTableViewController
masterMix.loadViewIfNeeded()
masterMix.waterVolumeLabel!.text = numberOfSampleTextField!.text

Answer 2

The error says you are assigning UITextField to UILabel. But you must assign textFeild.text to label.text.
let textField = UITextField()
let label = UILabel()
label.text = textField.text