Get “does not implement methodSignatureForSelector” when try to store Array in NSUserDefaults,Swift?

Make sure your class inherits from NSObject

class MyAccounts:NSObject {

   /* ... */

    class MyCalendar {
        var title:String?
        var identifier:String?
        var email:String?
        var calType:String?
        var isActive:Bool?
        var isMainAcount:Bool?

        init(){}
    }
}