How do I pass touch events through to parentViewController? - iphone

Question

I have a UIViewContoller with a few container(child) UIiewsController. The main UIViewController (mvc) contains:
1.) A UICollectionView that occupies the entire view of mvc (it is above mvc.view but below all other controls).
2.) A UIViewController that displays search options (s1vc)
3.) another similar to #2 (s2vc)
4.) another similar to #2 (s3vc)
I have added gesture recognizers to mvc so that a user can hide/show each of the child view controllers by swiping them off of the screen.
The problem is that when a user swipes any of the svcs off of the screen, they cannot scroll the mvc's collectionView.
Here is how I am hiding/showing the svcs:
-(void)swipeLeftGestureHandler:(UIGestureRecognizer*)gestureRecognizer{
SMLOG(#"Swiped Left");
if([SMUser activeUser] == nil) return;
if([self gestureHorizontalScreenSide:gestureRecognizer] == kHorizontalScreenSideLeft){
[self hideFacets];
}
else{
[self showAccordion];
}
}
-(void)swipeRightGestureHandler:(UIGestureRecognizer*)gestureRecognizer{
SMLOG(#"Swiped Right");
if([SMUser activeUser] == nil) return;
if([self gestureHorizontalScreenSide:gestureRecognizer] == kHorizontalScreenSideLeft){
[self showFacets];
}
else{
[self hideAccordion];
}
}
-(void)hideFacets{
if(self.facetVisible == NO) return;
[UIView animateWithDuration:0.25
animations:^{
CGRect newFrame = self.facetViewController.view.frame;
newFrame.origin = CGPointMake(newFrame.origin.x - newFrame.size.width, newFrame.origin.y);
self.facetViewController.view.frame = newFrame;
self.facetVisible = NO;
}
completion:^(BOOL finished){
self.facetViewController.view.hidden = YES;
self.facetViewController.view.userInteractionEnabled = NO;
}];
}
-(void)showFacets{
if([SMUser activeUser] == nil) return;
if(self.facetVisible == YES) return;
self.facetViewController.view.userInteractionEnabled = YES;
[UIView animateWithDuration:0.25
animations:^{
self.facetViewController.view.hidden = NO;
CGRect newFrame = self.facetViewController.view.frame;
newFrame.origin = CGPointMake(newFrame.origin.x + newFrame.size.width, newFrame.origin.y);
self.facetViewController.view.frame = newFrame;
self.facetVisible = YES;
}
completion:^(BOOL finished){
}];
}
As you can see I'm toggling the svc.view.hidden property and then I also tried toggling th svc.userInteractionEnabled.property but no luck. Still cannot swipe the collection view by swiping where the facets view controller was/is.
Any ideas?

Answer 1

The solution here is to add another outlet (using IB) for the container view in the parentViewController (I called it facetContainerView in this code) and then set it's userInteractionEnabled property.
-(void)hideFacets{
if(self.facetVisible == NO) return;
self.facetVisible = NO;
[UIView animateWithDuration:0.25
animations:^{
CGRect newFrame = self.facetViewController.view.frame;
newFrame.origin = CGPointMake(newFrame.origin.x - newFrame.size.width, newFrame.origin.y);
self.facetViewController.view.frame = newFrame;
}
completion:^(BOOL finished){
self.facetViewController.view.hidden = YES;
self.facetContainerView.userInteractionEnabled = NO;
}];
}
-(void)showFacets{
if(self.facetVisible == YES) return;
self.facetVisible = YES;
self.facetContainerView.userInteractionEnabled = YES;
[UIView animateWithDuration:0.25
animations:^{
self.facetViewController.view.hidden = NO;
CGRect newFrame = self.facetViewController.view.frame;
newFrame.origin = CGPointMake(newFrame.origin.x + newFrame.size.width, newFrame.origin.y);
self.facetViewController.view.frame = newFrame;
}
completion:^(BOOL finished){
}];
}
I was curious as to how this new view outlet was different from self.facetViewController.view, so I inserted this code to compare addresses (they are different indeed). I'm not sure about the heirarchy, but it seems that there is an extra view layer that I was not aware of.
NSLog(#"self.facetViewController.view: %p", self.facetViewController.view);
NSLog(#"self.facetContainerView: %p", self.facetContainerView);
Hopefully this will help someone at some point.