Customizing UIPageViewController gesture recognizers Scroll behavior

Question

I want to implement -(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch gesture delegate in pageviewcontroller.m file but i can't get any gesture as:

NSArray *temp = self.gestureRecognizers;
NSLog(@"count %i",temp.count); // this logs count 0 

NSArray *temp = self.view.gestureRecognizers;
NSLog(@"count %i",temp.count);  // this also logs count 0 

for (UIGestureRecognizer *gR in temp) {
    gR.delegate = self;
}

in above code self is pointing towards pageviewcontroller.

therefore i can't assign delegate to pageviewcontroller gestures.

Edited Part:

OK I got it, I am not getting any gesture object because of uipageviewscroll style.

But I have a problem I need to disable pageviewcontroller pan gesture and need to scroll the pageviewcontroller from two buttons, like if user try to pan, and it's starting point is inside my uibuttons frame then pageviewcontroller should scroll otherwise not.

I am using transitionStyle UIPageViewControllerTransitionStyleScroll.

Any solution for this... Thanks in advance

Answer 1

After trying so many hacks, I finally got solution.

What i did, first got the pageviewcontroller scorll view in a property

for (UIView *view in mypageviewcontroller.view.subviews) {
  if([view isKindOfClass:[UIScrollView class]])
  {
      pagescrollview= (UIScrollView *)view;
  }
}

Then assigned pan gesture to pageviewcontroller scorllview and gesture delegate.

UIPanGestureRecognizer* g1 = [[UIPanGestureRecognizer alloc] initWithTarget:self                                                       action:@selector(gesture)];

[g1 setDelegate:self];

[pagescrollview addGestureRecognizer:g1];

Then in gesture delegate , i checked whether the gesture starts from my desire points, if starts from a location that should scroll pageviewcontroller then this delegate method should return no to enable original pagescorllview gesture to receive pan gesture.

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch 
{
  if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) {

    CGPoint touchPoint = [touch locationInView:self.view];
    if(floor(NSFoundationVersionNumber)<=NSFoundationVersionNumber_iOS_6_1)
        touchPoint.y -=44;
    else
        touchPoint.y -=64;

    PGNavigationController *nav =ViewControllerArray[VisiblePageindex];
    PageContentVC *pagecontentvc = ((PageContentVC *) nav.visibleViewController);

    if (touchPoint.y > pagecontentvc.leftpanalbtn.frame.origin.y && (pagecontentvc.leftpanalbtn.frame.size.height+pagecontentvc.leftpanalbtn.frame.origin.y )>touchPoint.y && touchPoint.x >pagecontentvc.leftpanalbtn.frame.origin.x
        && touchPoint.x<(pagecontentvc.leftpanalbtn.frame.origin.x+pagecontentvc.leftpanalbtn.frame.size.width)) {
        return NO;
    }
    else if (touchPoint.y > pagecontentvc.rightpanalbtn.frame.origin.y && (pagecontentvc.rightpanalbtn.frame.size.height+pagecontentvc.rightpanalbtn.frame.origin.y )>touchPoint.y && touchPoint.x >pagecontentvc.rightpanalbtn.frame.origin.x
             && touchPoint.x<(pagecontentvc.rightpanalbtn.frame.origin.x+pagecontentvc.rightpanalbtn.frame.size.width))
    {

        return NO;
    }
    if( touchPoint.y>282 && touchPoint.x>118 &&touchPoint.y<282+75 && touchPoint.x < 118+85)
    {
        return NO;
    }
    // else if()
  }
  return YES;
}

hope it help someone else.