Implementing NSCoding in Swift?

Question

I was implementing an example posted here:

http://speakobjectively.blogspot.com/2014/06/nscoding-protocol-swift-version.html?showComment=1407612816583#c9059421260580133521

I get the error "expected declaration" in two statements:

documentDirectories = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)

and

car1.year = 1957

Ideas?

class CarData {

    var documentDirectories:NSArray = []
    var documentDirectory:String = ""
    var path:String = ""
    var unarchivedCars:NSArray = []
    var allCars:NSArray = []

    // Create a filepath for archiving.
    documentDirectories = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)

    // Get document directory from that list
    documentDirectory = documentDirectories.objectAtIndex(0) as String

    // append with the .archive file name
    path = documentDirectory.stringByAppendingPathComponent("swift_archiver_demo.archive")

    var car1:Car! = Car()
    var car2:Car! = Car()
    var car3:Car! = Car()

    car1.year = 1957
    car1.make = "Chevrolet"
    car1.model = "Bel Air"

    car2.year = 1964
    car2.make = "Dodge"
    car2.model = "Polara"

    car3.year = 1972
    car3.make = "Plymouth"
    car3.model = "Fury"

    allCars = [car1, car2, car3]

    // The 'archiveRootObject:toFile' returns a bool indicating
    // whether or not the operation was successful. We can use that to log a message.
    if NSKeyedArchiver.archiveRootObject(allCars, toFile: path) {
    println("Success writing to file!")
    } else {
    println("Unable to write to file!")
    }

    // Now lets unarchive the data and put it into a different array to verify
    // that this all works. Unarchive the objects and put them in a new array
    unarchivedCars = NSKeyedUnarchiver.unarchiveObjectWithFile(path) as NSArray

    // Output the new array
    for car : AnyObject in unarchivedCars {
    println("Here's a \(car.year) \(car.make) \(car.model)")

}

Answer 1

You're writing the code inside the class declaration! Any code after declaring your first set of vars needs to be inside functions. For example the init() function.