UIScrollView loss of reponse

[Magic Hands]

I have a UIViewController. Within that is a UITableView which is drawn at origin 0,0. I also have a UIScrollView that is drawn at 0,-80 so that it is off screen and not visible.

When a menu button is pressed, I animate the UIViewController's frame down 80px to reveal the UIScrollView.

The problem here is that the UIScrollView does not respond at all.

If I draw the UIScrollView at say 0,0 , where it IS visible on load, it works fine. I can even animate it off screen then back on screen with no issue.


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Here is how my view looks before animating:

     _____________________________
    |                             |  Frame -> (0,-80, 320, 80)                  
    |      ScrollView             |  **Offscreen**
    |_____________________________|
    |                             |  <- Original view (0,0,320,480)
    |                             |
    |                             |
    |                             |
    |                             |
    |                             |
    |       Original View         |
    |                             |
    |                             | 
    |                             |
    |                             |
    |                             |
    |                             |
    |                             |
    |                             |
    |                             |
    |                             |
    |_____________________________|

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When I animate I do the following:

 [UIView animateWithDuration:0.3 
                          delay:0.0 
                        options:(UIViewAnimationOptionAllowUserInteraction |
                                 UIViewAnimationOptionCurveEaseIn) 
                     animations:^{ 
                             self.view.frame = CGRectMake(0.0, (self.view.frame.origin.y + container.frame.size.height), self.view.frame.size.width, self.view.frame.size.height);
                            scroll.userInteractionEnabled = YES;
                         } 
         
                     completion:^(BOOL finished) { 
                             if (scrollLoaded == NO) {
                                 [self loadFavorites]; 
                                 scrollLoaded = YES;
                             }
                         }];

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Now my view looks like this after animating:

  
     _____________________________
    |                             |  Frame -> (0, -80, 320, 80)              
    |      ScrollView             |  
    |_____________________________|
    |                             |  <- Original view (0, 80, 320, 480)
    |                             |
    |                             |
    |                             |
    |                             |
    |                             |
    |       Original View         |
    |                             |
    |                             | 
    |                             |
    |                             |
    |                             |
    |                             |
    |                             |
    |_____________________________|
    |                             |
    |        **Offscreen**        |
    |_____________________________|

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I have subclassed my scrollView to listen more closely for events:

**.h**

 #import <UIKit/UIKit.h>
    
    @interface UIScrollView_ExtraTouch : UIScrollView
    
    @end

**.m**

 #import "UIScrollView+ExtraTouch.h"
    
    @implementation UIScrollView_ExtraTouch
    
    - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
        NSLog(@"scrollview touchesBegan");
        [self.nextResponder touchesBegan:touches withEvent:event];
    }
    
    - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
        NSLog(@"scrollview touchesMoved");
        if(!self.dragging){
            [self.nextResponder touchesMoved:touches withEvent:event];
        }
    }
    
    - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
        NSLog(@"scrollview touchesEnded");
        [self.nextResponder touchesEnded:touches withEvent:event];
    }
    
    @end

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Nothing goes to the log after the animation. Which I think means that since the frame is at -80, it believes it to be off screen, thus not receive any type of action.

Is this correct? If so is there a way to fix it?

[Magic Hands]

I think that I might have found an answer.

I am going to create a container view that is 560 to hold the views. That away I won't have to draw anything at a negative y value.