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iOS Build an Interactive Story App with Swift 2 Creating a Story Creating an Adventure

Posted by Carmen Ibarcena
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Carmen Ibarcena
iOS Development Techdegree Student 8,296 Points

Hello guys!! I have a question i started yesterday doing the Interactive Story App but today i did the update on Xcode

which it was Swift 3 to my surprise is been a headache since I am new in this i had so many errors even though I am writing the code exactly as Pasan does it in the following code the compiler is giving me error because it says that addChoide is unuse. Can someone help me and what can I do? Thank you

struct Adventure { static var story: Page { let returnTrip = Page(story: .ReturnTrip) let touchdown = returnTrip.addChoice("Stop and Investigate", story: .TouchDown) let homeward = returnTrip.addChoice("Continue Home to Earth", story: .Homeward) let rover = touchdown.addChoice("Explore the Rover", story: .Rover) let crate = touchdown.addChoice("Open the Crate", story: .Crate)

    homeward.addChoice("Head back to Mars", page: touchdown)
    let home = homeward.addChoice("Continue Home to Earth", story: .Home)

    let cave = rover.addChoice("Explore the Coordinates", story: .Cave)
    rover.addChoice("Return to Earth", page: home)

    cave.addChoice("Continue towards faint light", story: .Droid)
    cave.addChoice("Refill the ship and explore the rover", page: rover)

    crate.addChoice("Explore the Rover", page: rover)
    crate.addChoice("Use the key", story: .Monster)

    return returnTrip
}

}

4 Answers

Ronnie Stanley
Ronnie Stanley
4,842 Points
Ronnie Stanley
Ronnie Stanley
4,842 Points

You should be using Xcode 7 until the courses have been updated for Xcode 8 and Swift 3

Gruff Vaughan
Gruff Vaughan
11,073 Points
Gruff Vaughan
Gruff Vaughan
11,073 Points

I had this headache, until I played around and found under 'Build Settings' a dropdown for 'Use Legacy Swift Language Version'.

Change this to 'Yes' and your code will compile.

Carmen Ibarcena
seal-mask
.a{fill-rule:evenodd;}techdegree
Carmen Ibarcena
iOS Development Techdegree Student 8,296 Points
Carmen Ibarcena
.a{fill-rule:evenodd;}techdegree
Carmen Ibarcena
iOS Development Techdegree Student 8,296 Points

Thanks Gruff Vaughan what i did was i download Xcode 7.3 because it was going to be a big headache!!!

Thank you!! =)

Thomas Hugo
Thomas Hugo
5,457 Points
Thomas Hugo
Thomas Hugo
5,457 Points

The biggest change I've noticed with Swift 3 // Xcode 8 that causes issues with old code is referenced here, specifically where it mentions "If a parameter has an argument label, the argument must be labeled when you call the function". This contrasts the Swift 2 // Xcode 7 practice of omitting the first parameter label.

In this particular case, you would simply need to add the first parameter label "title" each time the "addChoice" method is called.

So instead of "let touchdown = returnTrip.addChoice("Stop and Investigate", story: .TouchDown)" you would add "title: " so it reads "let touchdown = returnTrip.addChoice(title: "Stop and Investigate", story: .TouchDown)".