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I get a startIndex error. The error is "Value of type 'string.index'(aka'string.characterview.index')has no member'advanced". Heres code and an image of the error. 

public override final var secureTextEntry: Bool {
    didSet {
        let textFieldArray: [UITextField?] = [numberInputTextField, cvcTextField, monthTextField, yearTextField]
        textFieldArray.forEach({$0?.isSecureTextEntry = secureTextEntry})
    }
}

Image of Error of isfirstresponder

Rosalind
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1 Answers1

2

In swift 3 you can no longer use advanced, successor or predecessor, instead you need to use 

let indexAfter = someString.index(after: someIndex)
let indexBefore = someString.index(before: someIndex)
let anyOtherIndex = someString.index(someIndex, offsetBy: distance)

so your code should look like this

let index = (hasOverflow) ? 
text.index(text.startIndex, offsetBy: expectedInputLength) :
text.index(text.startIndex, offsetBy: text.characters.count)

As a side note, 

text.index(text.startIndex, offsetBy: text.characters.count)

Is actually the same as 

text.endIndex

So you can use this instead

let index = (hasOverflow) ? 
text.index(text.startIndex, offsetBy: expectedInputLength) :
text.endIndex
Olivier Wilkinson
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