If else statement depending on textfield (swif3)

Question

I would like my code to simply display a label if and only if there is text in the textfiled if there is no text the label should be hidden. Thats it. My code below does not do what I have described above.

   import UIKit
class ViewController: UIViewController {

  @IBOutlet var label: UILabel!
  @IBOutlet var txtfield: UITextField!
 override func viewDidLoad() {
super.viewDidLoad()
appear()

  }
   func appear() {

if (txtfield.text?.isEmpty)! {
    label.isHidden = true

}
else {
    label.isHidden = false
}}}

Answer 1

Use the code below .

 override func viewWillAppear(_ animated: Bool)
    {
        textChanged(txtField)
    }

    func textChanged(_ textField: UITextField) {

        if textField.text == ""
        {
            textField.isHidden = true
        }
        else
        {
            textField.isHidden = false
        }
        print("Hello")
    }

    override func viewDidLoad()
    {
        super.viewDidLoad()
        txtField.addTarget(self, action: #selector(textChanged(_:)),for: .allEvents)
    }

• func textChanged will hide your textField if it is empty .
• Adding it to viewWillAppear will check textField at the screen appearing time .
• In viewDidLoad target (textChanged) is added to textField for every events .