Dismiss keyboard on touch anywhere outside UITextField

I am developing an iPad app that has a large number of UIViewControllers, UITableViews (with cells with accessoryViews of UITextFields) etc, etc. Many of the UIViewControllers appear within a navigation hierarchy.

There are many different places where UITextFields appear, including as UITableViewCell accessoryViews.

I would like to devise an efficient strategy for dismissing the keyboard whenever the user touches outside the UITextField currently being edited. I have searched for keyboard dismiss techniques but have not yet found an answer that explains how a general keyboard dismiss strategy might work.

For example, I like this approach, where the following code is added to any ViewController:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"* * * * * * * * *ViewControllerBase touchesBegan");

    [self.view endEditing:YES]; // dismiss the keyboard

    [super touchesBegan:touches withEvent:event];
}

...but this technique does not deal with situations where, for example, a touch occurs within a UITableView which is on display. So, I'd need to add some code to call endEditing when a UITableView is touched etc, etc. Which means that my app will be liberally sprinkled with lots of code to dismiss the keyboard when various other UIElements are touched.

I guess I could just try and identify all the different places where touches need to be intercepted and the keyboard dismissed, but it seems to me that there may be a better design pattern somewhere for handling iOS keyboard dismiss events.

Can anyone share their experiences in this matter, and recommend a specific technique for generically handling keyboard dismissal across an entire app?

Many thanks