How to toggle a UITextField secure text entry (hide password) in Swift?

Question

I currently have a UITextfield with an eye icon in it that when pressed is supposed to toggle the secure text entry on and off.

I know you can che

Answer 1

Swift 4 solution

You don't need extra if statement for simple toggle isSecureTextEntry property

func togglePasswordVisibility() {
        password.isSecureTextEntry = !password.isSecureTextEntry
    }

But there is a problem when you toggle isSecureTextEntry UITextField doesn't recalculate text width and we have extra space to the right of the text. To avoid this you should replace text this way

func togglePasswordVisibility() {
        password.isSecureTextEntry = !password.isSecureTextEntry
        if let textRange = password.textRange(from: password.beginningOfDocument, to: password.endOfDocument) {
            password.replace(textRange, withText: password.text!)
        }
    }

UPDATE

Swift 4.2

Instead of

password.isSecureTextEntry = !password.isSecureTextEntry

you can do this

password.isSecureTextEntry.toggle()