iPad keyboard will not dismiss if modal ViewContro

Question

Note:

See accepted answer (not top voted one) for solution as of iOS 4.3.

This question is about a behavior discovered in the iPad keyboard, where it refuses to be dismissed if shown in a modal dialog with a navigation controller.

Basically, if I present the navigation controller with the following line as below:

navigationController.modalPresentationStyle = UIModalPresentationFormSheet;

The keyboard refuses to be dismissed. If I comment out this line, the keyboard goes away fine.

...

I've got two textFields, username and password; username has a Next button and password has a Done button. The keyboard won't go away if I present this in a modal navigation controller.

WORKS

broken *b = [[broken alloc] initWithNibName:@"broken" bundle:nil];
[self.view addSubview:b.view];

DOES NOT WORK

broken *b = [[broken alloc] initWithNibName:@"broken" bundle:nil];
UINavigationController *navigationController = 
[[UINavigationController alloc]
 initWithRootViewController:b];
navigationController.modalPresentationStyle = UIModalPresentationFormSheet;
navigationController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:navigationController animated:YES];
[navigationController release];
[b release];

If I remove the navigation controller part and present 'b' as a modal view controller by itself, it works. Is the navigation controller the problem?

WORKS

broken *b = [[broken alloc] initWithNibName:@"broken" bundle:nil];
b.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:b animated:YES];
[b release];

WORKS

broken *b = [[broken alloc] initWithNibName:@"broken" bundle:nil];
UINavigationController *navigationController = 
    [[UINavigationController alloc]
         initWithRootViewController:b];
[self presentModalViewController:navigationController animated:YES];
[navigationController release];
[b release];

Answer 1

You could also work around this in a universal app by simply checking the idiom and if it's an iPad, don't pop up the keyboard automatically at all and let the user tap whatever they want to edit.

May not be the nicest solution but it's very straightforward and doesn't need any fancy hacks that will break with the next major iOS release :)

Answer 2

maybe don't return NO, but YES. So it can go away.

And you have a textFieldShouldEndEditing returning YES as well?

And why are you firing [nextResponder becomeFirstResponder]?! sorry i see now

I also have a number of UITextViews which all have their "editable" property set to FALSE.

May we assume none of them, by any chance, has a tag value of secondField.tag+1? If so, you're telling them to become first responder, instead of resigning the first responder. Maybe put some NSLog() in that if structure.

Answer 3

In the viewController that is presented modally just overwrite disablesAutomaticKeyboardDismissal to always return NO

- (BOOL)disablesAutomaticKeyboardDismissal {
    return NO;
}

Answer 4

Swift 4.1:
extension UINavigationController {
   override open var disablesAutomaticKeyboardDismissal: Bool {
      return false
   }
}

Answer 5

I solved this by using the UIModalPresentationPageSheet presentation style and resizing it immediately after I present it. Like so:

viewController.modalPresentationStyle = UIModalPresentationPageSheet;
viewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:viewController animated:YES];
viewController.view.superview.autoresizingMask = 
    UIViewAutoresizingFlexibleTopMargin | 
    UIViewAutoresizingFlexibleBottomMargin;    
viewController.view.superview.frame = CGRectMake(
    viewController.view.superview.frame.origin.x,
    viewController.view.superview.frame.origin.y,
    540.0f,
    529.0f
);
viewController.view.superview.center = self.view.center;
[viewController release];

Answer 6

Put this code in your viewWillDisappear: method of current controller is another way to fix this:

Class UIKeyboardImpl = NSClassFromString(@"UIKeyboardImpl");
id activeInstance = [UIKeyboardImpl performSelector:@selector(activeInstance)];
[activeInstance performSelector:@selector(dismissKeyboard)];