Can't get UITextField to autoshrink text

Question

I have a UITextField on a table view cell, and when it\'s text becomes too long I would like the font size to decrease. I want to make it very clear that I am t

Answer 1

Try this its working for me (swift 3.0)

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        // bla bla ... anything inside method you want to do
        // reset font size of textfield
        textField.font = UIFont.systemFont(ofSize: CGFloat(15.0))
        var widthOfText: CGFloat = textField.text!.size(attributes: [NSFontAttributeName: textField.font!]).width
        var widthOfFrame: CGFloat = textField.frame.size.width
        // decrease font size until it fits (25 is constant that works for me)
        while (widthOfFrame - 25) < widthOfText {
            let fontSize: CGFloat = textField.font!.pointSize
            textField.font = textField.font?.withSize(CGFloat(fontSize - 0.5))
            widthOfText = (textField.text?.size(attributes: [NSFontAttributeName: textField.font!]).width)!
            widthOfFrame = textField.frame.size.width
        }
        return true
    }