Coding array with NSCoder Swift

I'm trying to implement the NSCoder, but am currently facing a stubborn issue. My goal is to save the array of strings via NSCoder to a local file and load it when the app opens next time.

Here is the class i've created, but i'm not sure how i should handle the init and encoder functions:

class MyObject: NSObject, NSCoding {

var storyPoints: [String] = []

init(storyPoints : [String]) {
    self.storePoints = storePoints
}


required init(coder decoder: NSCoder) {
    super.init()

???

}

func encodeWithCoder(coder: NSCoder) {
???
}

}

Moreover, how do i access it in my view controller? where should i declare a path for saving the NSCoder? It's not really clear enough.

Looking forward to any advices.

Thank you.

via Chebli Mohamed