Found this solution on stackoverflow

BSIView.h

#import <UIKit/UIKit.h>

@interface BSIView : UIView

@end

BSIView.m

#import "BSIView.h"

@implementation UIView (FindAndResignFirstResponder)

- (BOOL)findAndResignFirstResponder
{
    if (self.isFirstResponder) {
        [self resignFirstResponder];
        return YES;
    }
    for (UIView *subView in self.subviews) {
        if ([subView findAndResignFirstResponder])
            return YES;
    }
    return NO;
}

@end

@implementation BSIView

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
    UIView* hit = [super hitTest:point withEvent:event];
    if(!hit.isFirstResponder)
        [self findAndResignFirstResponder];
    return hit;
}


/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
    // Drawing code
}
*/

@end

This may prove simpler, but I haven't tried it.
http://stackoverflow.com/a/12108918