public void ApplicationDidEnterBackgroundNotification()
{
var menuViewController = _sideMenuTransition.SideMenuManager.LeftNavigationController;
if (menuViewController != null)
{
_sideMenuTransition.HideMenuStart();
_sideMenuTransition.HideMenuComplete();
menuViewController.DismissViewController(false, null);
}
}
// animate a change from one viewcontroller to another
public override void AnimateTransition(IUIViewControllerContextTransitioning transitionContext)
{
// get reference to our fromView, toView and the container view that we should perform the transition in
var container = transitionContext.ContainerView;
var menuBackgroundColor = _sideMenuTransition.SideMenuManager.AnimationBackgroundColor;
if (menuBackgroundColor != null)
{
container.BackgroundColor = menuBackgroundColor;
}
// create a tuple of our screens
var screens = new
{
from = transitionContext.GetViewControllerForKey(UITransitionContext.FromViewControllerKey),
to = transitionContext.GetViewControllerForKey(UITransitionContext.ToViewControllerKey)
};
// assign references to our menu view controller and the 'bottom' view controller from the tuple
// remember that our menuViewController will alternate between the from and to view controller depending if we're presenting or dismissing
var menuViewController = (!_sideMenuTransition.Presenting ? screens.from : screens.to);
var topViewController = !_sideMenuTransition.Presenting ? screens.to : screens.from;
var menuView = menuViewController.View;
var topView = topViewController.View;
// prepare menu items to slide in
if (_sideMenuTransition.Presenting)
{
var tapView = new UIView();
tapView.AutoresizingMask = UIViewAutoresizing.FlexibleHeight | UIViewAutoresizing.FlexibleWidth;
var exitPanGesture = new UIPanGestureRecognizer();
exitPanGesture.AddTarget(/*SideMenuTransition.Current, */ () => _sideMenuTransition.HandleHideMenuPan(exitPanGesture));
var exitTapGesture = new UITapGestureRecognizer();
exitTapGesture.AddTarget(/*SideMenuTransition.Current, */ () => _sideMenuTransition.HandleHideMenuTap(exitTapGesture));
tapView.AddGestureRecognizer(exitPanGesture);
tapView.AddGestureRecognizer(exitTapGesture);
_sideMenuTransition.TapView = tapView;
_sideMenuTransition.originalSuperview = topView.Superview;
// add the both views to our view controller
switch (_sideMenuTransition.SideMenuManager.PresentMode)
{
case SideMenuManager.MenuPresentMode.ViewSlideOut:
container.AddSubview(menuView);
container.AddSubview(topView);
topView.AddSubview(tapView);
break;
case SideMenuManager.MenuPresentMode.MenuSlideIn:
case SideMenuManager.MenuPresentMode.MenuDissolveIn:
case SideMenuManager.MenuPresentMode.ViewSlideInOut:
container.AddSubview(topView);
container.AddSubview(tapView);
container.AddSubview(menuView);
break;
}
if (_sideMenuTransition.SideMenuManager.FadeStatusBar)
{
var blackBar = new UIView();
var menuShrinkBackgroundColor = _sideMenuTransition.SideMenuManager.AnimationBackgroundColor;
if (menuShrinkBackgroundColor != null)
{
blackBar.BackgroundColor = menuShrinkBackgroundColor;
}
else
{
blackBar.BackgroundColor = UIColor.Black;
}
blackBar.UserInteractionEnabled = false;
container.AddSubview(blackBar);
_sideMenuTransition.StatusBarView = blackBar;
}
_sideMenuTransition.HideMenuStart(); // offstage for interactive
}
// perform the animation!
var duration = TransitionDuration(transitionContext);
var options = _sideMenuTransition.interactive ? UIViewAnimationOptions.CurveLinear : UIViewAnimationOptions.CurveEaseInOut;
UIView.Animate(duration, 0, options,
animation: () =>
{
if (_sideMenuTransition.Presenting)
{
_sideMenuTransition.PresentMenuStart(); // onstage items: slide in
}
else
{
_sideMenuTransition.HideMenuStart();
}
menuView.UserInteractionEnabled = false;
},
completion: () =>
{
// tell our transitionContext object that we've finished animating
if (transitionContext.TransitionWasCancelled)
{
var viewControllerForPresentedMenu = _sideMenuTransition.viewControllerForPresentedMenu;
if (_sideMenuTransition.Presenting)
{
_sideMenuTransition.HideMenuComplete();
}
else
{
_sideMenuTransition.presentMenuComplete();
}
menuView.UserInteractionEnabled = true;
transitionContext.CompleteTransition(false);
if (_sideMenuTransition.switchMenus)
{
_sideMenuTransition.switchMenus = false;
viewControllerForPresentedMenu?.PresentViewController(
_sideMenuTransition.SideMenuManager.LeftNavigationController,
true, null);
}
return;
}
if (_sideMenuTransition.Presenting)
{
_sideMenuTransition.presentMenuComplete();
menuView.UserInteractionEnabled = true;
transitionContext.CompleteTransition(true);
switch (_sideMenuTransition.SideMenuManager.PresentMode)
{
case SideMenuManager.MenuPresentMode.ViewSlideOut:
container.AddSubview(topView);
break;
case SideMenuManager.MenuPresentMode.MenuSlideIn:
case SideMenuManager.MenuPresentMode.MenuDissolveIn:
case SideMenuManager.MenuPresentMode.ViewSlideInOut:
container.InsertSubview(topView, atIndex: 0);
break;
}
var statusBarView = _sideMenuTransition.StatusBarView;
if (statusBarView != null)
{
container.BringSubviewToFront(statusBarView);
}
return;
}
_sideMenuTransition.HideMenuComplete();
transitionContext.CompleteTransition(true);
menuView.RemoveFromSuperview();
});
}