Hide UITabBarController

TabBarController.swift

extension UITabBarController {
    
    func setTabBarVisible(visible:Bool, animated:Bool) {
        
        let frame = self.tabBar.frame
        let height = frame.size.height
        let offsetY = (visible ? -height : height)
        UIView.animate(withDuration: animated ? 0.3 : 0.0) {
            self.tabBar.frame = frame.offsetBy(dx: 0, dy: offsetY)
            self.view.frame = CGRect(x: 0, y: 0, width: self.view.frame.width, height: self.view.frame.height + offsetY)
            self.view.setNeedsDisplay()
            self.view.layoutIfNeeded()
        }
    }
    
    func tabBarIsVisible() ->Bool {
        return self.tabBar.frame.origin.y < self.view.frame.maxY
    }
}