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I have an app in which the user has to type a four digit pin code. All digits have to be at a set distance from each other.
Is there a way to do this if the PinTextField is a subclass of UIView? I know in a ViewController you could use UITextFieldTextDidChangeNotification and set the attributed text for each change. Notifications don't seem to work in a UIView though.
Also I was wondering if there isn't a simpler way than making an attributed string for every update if you want to set the letter spacing of a UITextField text ?
Correct spacing:
Wrong spacing:
210
The two modifiers are tracking() and kerning() : both add spacing between letters, but tracking will pull apart ligatures whereas kerning will not, and kerning will leave some trailing whitespace whereas tracking will not.
The important methods of a JTextField class are setText(), getText(), setBorder(), setEnabled(), etc. We can add padding to a JTextField using the setMargin(Insets s) of JTextComponent class.
No need to go for attributedText, which to be honest, was a mess implementing with modified spacing. As soon as I closed the keyboard the spacing disappeared, which prompted me to dig further.
Every UITextField has a property called defaultTextAttributes, which according to Apple "returns a dictionary of text attributes with default values.". The Apple document also says that "this property applies the specified attributes to the entire text of the text field"
Just find a suitable place in your code, usually where the textfield is being initialized and then copy and paste the following.
Answered in Swift 3.0
textfield.defaultTextAttributes.updateValue(spacing, forKey: NSKernAttributeName) where spacing is of CGFloat type. For example 2.0
This works for different fonts as well.
Cheers!!
The latest syntax seems to be:
yourField.defaultTextAttributes.updateValue(36.0, forKey: NSAttributedString.Key.kern) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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