func DownArrowPress(sender: UIKeyCommand) {
    print("Arrow Down Start")
}
func UpArrowPress(sender: UIKeyCommand) {
    print("Arrow Up Start")
}
func LeftArrowPress(sender: UIKeyCommand) {
    print("Arrow Left Start")
}
func RightArrowPress(sender: UIKeyCommand) {
    print("Arrow Right Start")
}
func SpaceKeyPress(sender: UIKeyCommand) {
    print("Space Start")
}
override var keyCommands: [UIKeyCommand]? {
    return [
        UIKeyCommand(input: UIKeyInputDownArrow, modifierFlags: [], action: "DownArrowPress"),
        UIKeyCommand(input: UIKeyInputUpArrow, modifierFlags: [], action: "UpArrowPress"),
        UIKeyCommand(input: UIKeyInputLeftArrow, modifierFlags: [], action: "UIKeyInputLeftArrow"),
        UIKeyCommand(input: UIKeyInputRightArrow, modifierFlags: [], action: "UIKeyInputRightArrow"),
        UIKeyCommand(input: " ", modifierFlags: [], action: "SpaceKeyPress")]
}