Xcode has been updated and the code in the videos hasn't been working correctly. issue: "unresolved identifier 'facts'"

I've been running into problems with all the code in the creating a basic iphone app series of videos. Most of Pasan's code has some tiny error here or there after the latest update. My latest issue I've encountered is that the following code comes up with the error "use of unresolved identifier 'facts'" twice:

func randomFact() -> String {

    let randomNumber = GKRandomSource.sharedRandom().nextInt(upperBound: facts.count)

    return facts[randomNumber]
}

To remedy this I tried changing it to:

 func randomFact() -> String {

    let randomNumber = GKRandomSource.sharedRandom().nextInt(upperBound: FactProvider.facts.count)

    return FactProvider.facts[randomNumber]
}

FactProvider.facts.count came up with the error: "Instance member 'facts' cannot be used on type FactProvider"

While FactsProvider.facts[randomNumber] worked just fine. If someone could explain how to fix this as well as why the code worked the second time but not the first it would be a huge help. Thanks in advance.