Question

I have a board (UIViewController) which instantiates card objects (UIViewControllers). On each card there’s a texfield. In order to remove the keyboard by clicking on the non card area (= view of the board) I need a reference to the board specified in the UITapGestureRecognizer. Here’s my current approach.

Board (UIViewController) Initializing a card object

-(void) addCard:(id)touchEvent{
    CardViewController *card = [[CardViewController alloc]initItemWithText:@"..."];
    [self addChildViewController:card];
    [self.view addSubview:card.view];
}

Card (UIViewController) On init, add Tap Gesture Recognizer

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
...
    UITapGestureRecognizer *tapBackground = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapBackground:)];
    [self.parentViewController.view addGestureRecognizer:tapBackground];
...
}

The “background” reference using the parentViewController method doesn’t seem to work. Why?

How can I reference from the card back to the board to resign the card’s first responder on tap?

Answer 1

Try add the gesture code to Board instead of Card (in viewDidLoad)

UITapGestureRecognizer *tapBackground = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapBackground:)];
[self.view addGestureRecognizer:tapBackground];