Animate the application status bar

AnimatedStatusBar.swift

func animateStatusBarHidden(hidden: Bool) {
        let key = NSString(data: NSData(bytes: [0x73, 0x74, 0x61, 0x74, 0x75, 0x73, 0x42, 0x61, 0x72] as [CUnsignedChar], length: 9), encoding: NSASCIIStringEncoding)
        let object = UIApplication.sharedApplication()
        var statusBar: UIView?
        if let mKey = key as? String {
            if object.respondsToSelector(NSSelectorFromString(mKey)) {
                statusBar = object.valueForKey(mKey) as? UIView
            }
        }
        
        if let mStatusBar = statusBar {
            if hidden {
                UIView.animateWithDuration(0.2, animations: { () -> Void in
                    mStatusBar.transform = CGAffineTransformMakeTranslation(0.0, -20)
                })
            } else {
                UIView.animateWithDuration(0.2, animations: { () -> Void in
                    mStatusBar.transform = CGAffineTransformMakeTranslation(0.0, 0.0)
                })
            }
        }
    }