-(void)viewDidLoad{

[self setup];
}

- (void)setup
{

self.dummyView.backgroundColor = [UIColor whiteColor];

CGSize size = self.dummyView.bounds.size;(dummy view frame is (0,0,320,568 ))
  self.paneState = PaneStateClosed;
self.pane = [[DraggableView alloc] initWithFrame:CGRectMake(0, 568, size.width, size.height)];(//This is my draggable view)
self.pane.backgroundColor = [UIColor grayColor];
self.pane.layer.cornerRadius = 8;
self.pane.delegate = self;
[self.dummyView addSubview:self.pane];

self.animator = [[UIDynamicAnimator alloc] initWithReferenceView:self.dummyView];

 UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(didTap:)];
[self.dummyView addGestureRecognizer:tapRecognizer];

}

- (void)animatePaneWithInitialVelocity:(CGPoint)initialVelocity
 {
   if (!self.paneBehavior) {
    PaneBehavior *behavior = [[PaneBehavior alloc] initWithItem:self.pane];
    self.paneBehavior = behavior;
  }
  self.paneBehavior.targetPoint = self.targetPoint;
  self.paneBehavior.velocity = initialVelocity;
  [self.animator addBehavior:self.paneBehavior];
 }

 - (CGPoint)targetPoint
{
   CGSize size = self.dummyView.bounds.size;
  return self.paneState == PaneStateClosed > 0 ? CGPointMake(size.width/2, size.height * 1.25) : CGPointMake(size.width/2, size.height/2 + 50);
}

- (void)didTap:(UITapGestureRecognizer *)tapRecognizer
{
    self.paneState = self.paneState == PaneStateOpen ? PaneStateClosed : PaneStateOpen;
   [self animatePaneWithInitialVelocity:self.paneBehavior.velocity];

   self.dummyView.hidden = YES(//When i set hidden is equal to YES then my animation effect loses.This one line code has problem. How to hide dummyView without losing animation effect?)

}