SlotMachine

Class function

useful in the case where no instance is needed to be generated

// Class function is used when it is no necessary for instance
class func creatSlots() -> [[Slot]] {
    let kNumberOfSlots = 3
    let kNumberOfContainers = 3
    
    var slots:[[Slot]] = []
    for var containerNumber=0; containerNumber < kNumberOfContainers; ++containerNumber {
        var slotArray:[Slot] = []
        
        for var slotNumber=0; slotNumber < kNumberOfSlots; ++slotNumber {
            var slot = Slot(value: 0, image: UIImage(named: "")!, isRed: true)
            slotArray.append(slot)
        }
     
        slots.append(slotArray)
    }
    
    return slots
}

Alert dialog/message

calling UIAlertController and UIAlertAction.

func showAlertWithText(header:String = "Warning", message:String) {
    var alert = UIAlertController(title: header, message: message, preferredStyle: UIAlertControllerStyle.Alert)
    alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
    // Display alert on the screen
    self.presentViewController(alert, animated: true, completion: nil)
}