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Andrew Sherman
6,799 PointsImplementing a Login Screen with Delegates
so when I open the file in my Xcode, the Login screen has a code error which is preventing me from following along with the video.
In this part of the code:
''' swift
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool { let length = count(textField.text) - range.length + count(string) if length > 0 { submitButton.enabled = true } else { submitButton.enabled = false } return true } '''
there is an error on the line
let length = count(textField.text) - range.length + count(string)
which tells me "cannot invoke 'count' with an argument list of type (String?)"
I can't seem to figure out how to work this out, any help would be appreciated. Thanks!
2 Answers
Julia Nocera
4,680 PointsIt seems that you can no longer call the count function and instead it is a property on textField in Xcode 7. You need to change it to:
let length = textField.text!.characters.count - range.length + string.characters.count
Anthony Boutinov
13,844 PointsXcode 7.3 is smart enough now to fix that issue all by itself upon opening the project for the first time.