UITextField placeholder text: adjust to fit

Question

I have UITextField with longer text in it set as placeholder. What I want is for this placeholder text to adjust its font size when the width of field is too sm

Answer 1

You can create a subclass of UITextField:

class AutoSizeTextField: UITextField {
    override func layoutSubviews() {
        super.layoutSubviews()

        for subview in subviews {
            if let label = subview as? UILabel {
                label.minimumScaleFactor = 0.3
                label.adjustsFontSizeToFitWidth = true
            }
        }
    }
}    

Or you can just add some code in your view controller's viewDidAppear:

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)

    for subview in fieldTest.subviews {
        if let label = subview as? UILabel {
            label.minimumScaleFactor = 0.3
            label.adjustsFontSizeToFitWidth = true
        }
    }
}