Question

I have a UIView containing a UIScrollView.
This UIView is supposed to respond to some touch events but it is not responding because of the scrollView it contains.

This scrollView’s contentView is set to a MoviePlayer inside the OuterView.
Now whenever I click in the area where the MoviePlayer is, touch events of my OuterView are not responding.

I have even set the movie player’s userInteraction to NO.

but now scrollView is interfering it seems.

I have referred to this post on SO itself.

How can a superview interecept a touch sequence before any of its subviews?

But the solution there, asks me to set the userInteractionEnabled to NO for the scrollView
But if I do so, my pinch zoom doesn’t take place either!

What to do?

Answer 1

An UIScrollView intercepts all touch events because it has to decide if/when the user has movd their finger in order to scroll the scroll view.
You may want to subclass UIView, then in the

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)evt;
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)evt;
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)evt;

methods, check for the neccessary touches, then forward all these methods to your UIScrollViewInstance. For example:

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface MyView: UIView {
    UIScrollView *scrollView;
}

@end

@implementation MyView

/* don't forget to alloc init your ScrollView init -init
   and release it in -dealloc! Then add it as a subview of self. */

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)evt
{
    /* check for a gesture */
    [scrollView touchesBegan:touches withEvent:evt];
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)evt;
{
    /* check for a gesture */
    [scrollView touchesMoved:touches withEvent:evt];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)evt;
{
    /* check for a gesture */
    [scrollView touchesEnded:touches withEvent:evt];
}

@end