How to change textfield font size programmatically?

Question

I have a button that creates a text field, I also have a button to change the text field's font. I created 3 button with different titles: 17,20,36. I want the functions of that button to change the font size of the text field, how can I do this?

Answer 1

you can use NSAttributedString to add properties to TextField

let textAttributes: [NSAttributedString.Key: Any] = [
        NSAttributedString.Key.strokeColor: /* TODO: fill in appropriate UIColor */,
        NSAttributedString.Key.foregroundColor: /* TODO: fill in appropriate UIColor */,
        NSAttributedString.Key.font: UIFont(name: "HelveticaNeue-CondensedBlack", size: 40)!,
        NSAttributedString.Key.strokeWidth:  /* TODO: fill in appropriate Float */
    ]

yourTextField.defaultTextAttributes = textAttributes 

Answer 2

Swift 4:

textField1.font = UIFont(name: "Avenir", size: 22)