UIDatePicker inside UIScrollView with pages

Question

I have a UIScrollView with 2 pages, and I can scroll horizontally between them. However, on one of my pages, I have a UIDatePicker, and the scroll view is intercepting the

Answer 1

Awesome help Sam! I used that to create a simple category that swizzles the method (because I was doing this in a UITableViewController and thus would have had to do some really messy stuff to subclass the scroll view).

#import 

@interface UIScrollView (withControls)

+ (void) swizzle;

@end

And the main code:

#import 
#import "UIScrollView+withControls.h"

#define kUIViewBackgroundImageTag 6183746
static BOOL swizzled = NO;

@implementation UIScrollView (withControls)

+ (void)swizzleSelector:(SEL)orig ofClass:(Class)c withSelector:(SEL)new;
{
    Method origMethod = class_getInstanceMethod(c, orig);
    Method newMethod = class_getInstanceMethod(c, new);

    if (class_addMethod(c, orig, method_getImplementation(newMethod),
                        method_getTypeEncoding(newMethod))) {
        class_replaceMethod(c, new, method_getImplementation(origMethod),
                            method_getTypeEncoding(origMethod));
    } else {
        method_exchangeImplementations(origMethod, newMethod);
    }
}

+ (void) swizzle {
    @synchronized(self) {
        if (!swizzled) {

            [UIScrollView swizzleSelector:@selector(hitTest:withEvent:)
                                  ofClass:[UIScrollView class]
                             withSelector:@selector(swizzledHitTest:withEvent:)];
            swizzled = YES;
        }
    }
}

- (UIView*)swizzledHitTest:(CGPoint)point withEvent:(UIEvent *)event {
    UIView* result = [self swizzledHitTest:point withEvent:event]; // actually calling the original hitTest method

    if ([result.superview isKindOfClass:[UIPickerView class]]) {
        self.canCancelContentTouches = NO;  
        self.delaysContentTouches = NO;
    } else {
        self.canCancelContentTouches = YES; // (or restore bool from prev value if needed)
        self.delaysContentTouches = YES;    // (same as above)
    }
    return result;
}

@end

Then, in my viewDidLoad method, I just called

[UIScrollView swizzle];