show tabbar on tap
func setTabBarVisible(visible: Bool, animated: Bool) {
//* This cannot be called before viewDidLayoutSubviews(), because the frame is not set before this time
// bail if the current state matches the desired state
if (tabBarIsVisible() == visible) { return }
// get a frame calculation ready
let frame = self.tabBarController?.tabBar.frame
let height = frame?.size.height
let offsetY = (visible ? -height! : height)
// zero duration means no animation
let duration: TimeInterval = (animated ? 0.3 : 0.0)
// animate the tabBar
if frame != nil {
UIView.animate(withDuration: duration) {
self.tabBarController?.tabBar.frame = frame!.offsetBy(dx: 0, dy: offsetY!)
return
}
}
}
func tabBarIsVisible() -> Bool {
return (self.tabBarController?.tabBar.frame.origin.y)! < self.view.frame.maxY
}
// Call the function from tap gesture recognizer added to your view (or button)
@IBAction func tapped(_ sender: Any?) {
setTabBarVisible(visible: !tabBarIsVisible(), animated: true)
}