ScreenSize
let screenSize: CGRect = UIScreen.mainScreen().bounds
let screenWidth = screenSize.width
let screenHeight = screenSize.heightgeneral func:
func getScreenSize() ->CGRect {
    
    return UIScreen.mainScreen().bounds
    
}
func getScreenWidth() ->CGFloat {
    let screenSize: CGRect = UIScreen.mainScreen().bounds
    return screenSize.width
    
}
func getScreenHeight() ->CGFloat {
    let screenSize: CGRect = UIScreen.mainScreen().bounds
    return screenSize.height
}