Swift3: Live UiLabel update on user input

Question

I\'ve searched everywhere and can\'t seem to find a clear answer on updating a label in real-time.

How do i go about updating a UILabel (real-time) with

Answer 1

step 1:Extend class to UITextFieldDelegate

class ViewController: UIViewController,UITextFieldDelegate

In ViewDidLoad()

Step 2: Add Following code into ViewDidLoad()

txtDemo.delegate = self

txtDemo.addTarget(self, action: #selector(LabelChanged(_:)), for:.editingChanged)

step 3: Make new Function as below:

func LabelChanged(_ sender:Any) {
    lblDemo.text = txtDemo.text
}

Or Also use delegate method:

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
    lblDemo.text = txtDemo.text
    return true
}

Here lblDemo is UILabel outlet and txtDemo is UITextField outlet