Swift 'AnyObject' does not have a member named "make" - object

Question

I am confused on how I can have two keys as strings and one works and the other doesn't. Error occurs in the line near the end:
println("Here's a (car.year) (car.make) (car.model)")
What is it about the "make" variable that could be causing the problem?
protocol NSCoding {
}
class Car:NSObject {
var year: Int = 0
var make: String = ""
var model: String = ""
override init() {
super.init()
}
func encodeWithCoder(aCoder: NSCoder!) {
aCoder.encodeInteger(year, forKey:"year")
aCoder.encodeObject(make, forKey:"make")
aCoder.encodeObject(model, forKey:"model")
}
init(coder aDecoder: NSCoder!) {
super.init()
year = aDecoder.decodeIntegerForKey("year")
make = aDecoder.decodeObjectForKey("make") as String
model = aDecoder.decodeObjectForKey("model") as String
}
}
class CarData {
func archiveData () {
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

Use downcasting in your for loop. The compiler needs to know that car is of type Car and not just AnyObject.
for car in cars as [Car!] {
println("Here's a \(car.year) \(car.make) \(car.model)")
}