Custom Container using UIScrollView with two fingers - ios

Question

I'm creating a container view controller where the child view controllers are shown like a paged scrollView. In this container controller I want to change between pages scrolling horizontally using two fingers. So I used a UIScrollView and I have set it like that:
self.scrollView.showsHorizontalScrollIndicator = NO;
self.scrollView.showsVerticalScrollIndicator = NO;
self.scrollView.delegate = self;
[self.scrollView setContentOffset:[self rectForPage:1].origin];
for (UIGestureRecognizer *gestureRecognizer in self.scrollView.gestureRecognizers) {
if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) {
UIPanGestureRecognizer *panGR = (UIPanGestureRecognizer *) gestureRecognizer;
panGR.minimumNumberOfTouches = 2;
}
}
I also have implemented the - (void)scrollViewDidScroll:(UIScrollView *)sender method to avoid the vertical scrolling
- (void)scrollViewDidScroll:(UIScrollView *)sender {
CGFloat pageWidth = self.scrollView.frame.size.width;
int page = floor((self.scrollView.contentOffset.x +pageWidth/2) / pageWidth);
self.pageControl.currentPage = page;
[self.scrollView setContentOffset: CGPointMake(self.scrollView.contentOffset.x, 0)];
}
Now the problem is that the childViewControllers subviews can't receive the touches from the user. I want the single touch to be passed throw the view hierarchy. I have read about subclassing UIScrollView to overwrite the method - (BOOL)touchesShouldBegin:(NSSet *)touches withEvent:(UIEvent *)event inContentView:(UIView *)view but it's only called if the subviews are UIControl. How I can do it?
The purpose is that this ChildViewControllers have UIButtons inside and ScrollViews that should be used with singleTouches

Answer 1

maybe not exactly, but this might help you. Create a scroll view subclass and implement this;
- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event {
// UIView will be "transparent" for touch events if we return NO
for (id subview in self.subviews) {
if ([subview isKindOfClass:[YourViewController class]]) {
YourViewController *VC = (YourViewController*) subview;
if (CGRectContainsPoint(YourViewController.frame, point)) {
return YES;
}
}
}
return NO;
}