防止子视图上的UITapGestureRecognizer

Question

I don't want closeShareView being called when the user taps on contentView , only on modalView , how can I do that?

UIWindow* mainWindow = (((AppDelegate *)[UIApplication sharedApplication].delegate).window);

// Modal view
UIView *modalView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
modalView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.8f];

// Content view (goes inside modalView)
UIView *contentView = [[UIView alloc] initWithFrame:CGRectMake(modalView.center.x, modalView.center.y, 220, 220)];
[modalView addSubview:contentView];
[mainWindow addSubview:modalView];

// Tap gesture (added to modalView)
UITapGestureRecognizer *gr = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(closeShareView:)];
gr.numberOfTapsRequired = 1;
[modalView addGestureRecognizer:gr];

Answer 1

Firstly, adhere to the UIGestureRecognizerDelegate protocol in your header file.

Set the delegate of the UIGestureRecognizer to self .

Then set the tag of your subview eg to 100 (but you should use a constant).

Then use something like:

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    CGPoint point = [gestureRecognizer locationInView:self.view];
    UIView *viewTouched = [self.view hitTest:point withEvent:nil];
    if (viewTouched.tag == 100) {
        // Don't BEGIN the gestureRecognizer
        return NO;
    } else {
        // Do BEGIN the gestureRecognizer
        return YES;
    }
}

Answer 2

So you want something like a "click outside the content view to dismiss the modal" kind of deal?

Instead of adding the tap gesture to the entire modal view, have a background view that handles that, and the content view will naturally intercept all taps (if it has user interaction enabled), so you basically don't have to do any coding.

UIWindow* mainWindow = (((AppDelegate *)[UIApplication sharedApplication].delegate).window);

// Modal view
UIView *modalView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

// Background tap view
UIView *backgroundView = [[UIView alloc] initWithFrame:modalView.bounds];
backgroundView.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.8];
[modalView addSubview:backgroundView];

// Content view (goes inside modalView)
UIView *contentView = [[UIView alloc] initWithFrame:CGRectMake(modalView.center.x, modalView.center.y, 220, 220)];
[modalView addSubview:contentView];
[mainWindow addSubview:modalView];

// Tap gesture (added to backgroundView)
UITapGestureRecognizer *gr = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(closeShareView:)];
gr.numberOfTapsRequired = 1;
[backgroundView addGestureRecognizer:gr];

Answer 3

I'm just checking to see if the touched view is self, else it's a subview and the gesture shouldn't begin:

func gestureRecognizerShouldBegin(gestureRecognizer: UIGestureRecognizer) -> Bool {
    let point = gestureRecognizer.locationInView(self.view)
    if let viewTouched = self.view.hitTest(point, withEvent: nil) where viewTouched != self.view {
        return false
    } else {
        return true
    }
}

Answer 4

  @objc func handleTap(_ sender: UITapGestureRecognizer){
    let point = sender.location(in: subview)
    if !(tapView.frame.contains(point)) {
        self.dismiss(animated: true, completion: nil)
    }

}

Here, tapview is the view on which the tap gesture is added and subview is it's subview