Dismissing iOS keyboard by pressing return or by pressing the screen

KeyboardDismissalViewController.h

// This should be the viewcontroller that the keyboard commmunicates with.

@interface KeyboardDismissalViewController : UIViewController

@property (strong, nonatomic) IBOutlet UITextField *theTextFieldThatOpensTheKeyboardInTheFirstPlace;

- (IBAction)textFieldDoneEditing:(id)sender;
- (IBAction)backgroundTap:(id)sender;

@end

KeyboardDismissalViewController.m

// add this to the implementation file, then go to the nib/storyboard and: 
// 1. Open the connections inspector. 
// 2. Drag from the text field's Did End On Exit to the File's Owner 
// 3. Connect to the textFieldDoneEditing method. 
// Now everytime you press return/done key, that'll fire the below method and dismiss the keyboard.

- (IBAction)textFieldDoneEditing:(id)sender
{
  [sender resignFirstResponder];
}

// Add this to the implementation file, then go to the nib/storyboard and:
// 1. Select the view that the text field you're editing belongs to.
// 2. Open the identity inspector, and change the view's custom class from UIView to UIControl.
// 3. Open the connections inspector, and drag from Touch Down to the File's Owner.
// 4. Connect to the backgroundTap: method.
// Now everytime you click on a part of the view that isn't an active control, the keyboard will retract.

- (IBAction)backgroundTap:(id)sender
{
  [self.theTextFieldThatOpensTheKeyboardInTheFirstPlace resignFirstResponder];
  // add any other things that might open up a keyboard!
}