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iOS Build an Interactive Story App with Swift 2 Creating the User Interface Programmatically Continuing Our Story

Posted by vpqyrkdqqt
vpqyrkdqqt
2,284 Points

Why I am getting this error in Swift: expected ',' separator when I use #selector like in the video?

My code is identical to the one in the video but I keep getting an error message. Here is my code: 

    if let firstChoice = page.firstChoice {
            firstChoiceButton.setTitle(firstChoice.title, forState: .Normal)
            firstChoiceButton.addTarget(self, action: #selector(PageController.loadFirstChoice), forControlEvents: .TouchUpInside)
        } else {
            firstChoiceButton.setTitle("Play Again", forState: .Normal)
        }

        if let secondChoice = page.secondChoice {
            secondChoiceButton.setTitle(secondChoice.title, forState: .Normal)
        }
    }
}

Swift does not like the #selector(). I can't figure out what the problem here is. Perhaps could it be that my version of Xcode isn't up to date? Thanks!

3 Answers

Nathan Wong
Nathan Wong
7,129 Points

It's definitely possible that your version of Xcode isn't up to date! The new #selector syntax will only work in Xcode 7.3 (or newer). Which are you using?

Comb Giss
Comb Giss
589 Points
Comb Giss
Comb Giss
589 Points

Its just Selector("loadFirstChoice")

vpqyrkdqqt
vpqyrkdqqt
2,284 Points
vpqyrkdqqt
vpqyrkdqqt
2,284 Points

Awesome, that was the culprit. I updated Xcode and now everything works. Thanks again Nathan! For other Treehouse users, it does take a good amount of time to update Xcode so please be sure to set aside some time to do so.