Dismiss modal view form sheet controller on outside tap - objective-c

Question

I am presenting a modal view controller as a form sheet and dismissing it when the cancel button, which is a bar button item, is clicked. I need to dismiss it when I tap on outside of that view. Please help me with a reference. Note: my modal view controller is presented with a navigation controller.
#cli_hlt, #Bill Brasky thanks for your answer. I need to dismiss it when tap occurs outside of the modal view which is a form sheet. I am pasting my code below.
-(void)gridView:(AQGridView *)gridView didSelectItemAtIndex:(NSUInteger)index
{
if(adminMode)
{
CHEditEmployeeViewController *editVC = [[CHEditEmployeeViewController alloc] initWithNibName:#"CHEditEmployeeViewController" bundle:nil];
editVC.delegate = self;
editVC.pickedEmployee = employee;
editVC.edit = TRUE;
editVC.delegate = self;
UINavigationController *navigationController = [[UINavigationController alloc]initWithRootViewController:editVC];
navigationController.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentModalViewController:navigationController animated:YES];
return;
} //the above code is from the view controller which presents the modal view. Please look at the below code too which is from my modal view controller. Please guide me in a proper way. -(void)tapGestureRecognizer {
UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapBehind:)];
[recognizer setNumberOfTapsRequired:1];
recognizer.cancelsTouchesInView = NO; //So the user can still interact with controls in the modal view
[self.view addGestureRecognizer:recognizer];
}
- (void)handleTapBehind:(UITapGestureRecognizer *)sender
{
if (sender.state == UIGestureRecognizerStateEnded)
{
CGPoint location = [sender locationInView:nil]; //Passing nil gives us coordinates in the window
//Then we convert the tap's location into the local view's coordinate system, and test to see if it's in or outside. If outside, dismiss the view.
if (![self.view pointInside:[self.view convertPoint:location fromView:self.view.window] withEvent:nil])
{
[self dismissModalViewControllerAnimated:YES];
[self.view.window removeGestureRecognizer:sender];
}
}
}

Answer 1

I know this is an old question but this IS possible, despite of what the "right" answer says. Since this was the first result when I was looking for this I decided to elaborate:
This is how you do it:
You need to add a property to the View Controller from where you want to present modally, in my case "tapBehindGesture".
then in viewDidAppear
if(!tapBehindGesture) {
tapBehindGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapBehindDetected:)];
[tapBehindGesture setNumberOfTapsRequired:1];
[tapBehindGesture setCancelsTouchesInView:NO]; //So the user can still interact with controls in the modal view
}
[self.view.window addGestureRecognizer:tapBehindGesture];
And Here is the implementation for tapBehindDetected
- (void)tapBehindDetected:(UITapGestureRecognizer *)sender
{
if (sender.state == UIGestureRecognizerStateEnded)
{
//(edited) not working for ios8 above
//CGPoint location = [sender locationInView:nil]; //Passing nil gives us coordinates in the window
CGPoint location = [sender locationInView: self.presentingViewController.view];
//Convert tap location into the local view's coordinate system. If outside, dismiss the view.
if (![self.presentedViewController.view pointInside:[self.presentedViewController.view convertPoint:location fromView:self.view.window] withEvent:nil])
{
if(self.presentedViewController) {
[self dismissViewControllerAnimated:YES completion:nil];
}
}
}
}
Just remember to remove tapBehindGesture from view.window on viewWillDisappear to avoid triggering handleTapBehind in an unallocated object.

Answer 2

I solved iOS 8 issue by adding delegate to gesture recognizer
[taprecognizer setDelegate:self];
with these responses
#pragma mark - UIGestureRecognizer Delegate
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
return YES;
}
that works for me with iOS 8 GM

Answer 3

Swift 4 version that works in both portrait and landscape - no swapping of x, y required.
class TapBehindModalViewController: UIViewController, UIGestureRecognizerDelegate {
private var tapOutsideRecognizer: UITapGestureRecognizer!
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if (self.tapOutsideRecognizer == nil) {
self.tapOutsideRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.handleTapBehind))
self.tapOutsideRecognizer.numberOfTapsRequired = 1
self.tapOutsideRecognizer.cancelsTouchesInView = false
self.tapOutsideRecognizer.delegate = self
self.view.window?.addGestureRecognizer(self.tapOutsideRecognizer)
}
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
if(self.tapOutsideRecognizer != nil) {
self.view.window?.removeGestureRecognizer(self.tapOutsideRecognizer)
self.tapOutsideRecognizer = nil
}
}
func close(sender: AnyObject) {
self.dismiss(animated: true, completion: nil)
}
// MARK: - Gesture methods to dismiss this with tap outside
#objc func handleTapBehind(sender: UITapGestureRecognizer) {
if (sender.state == UIGestureRecognizerState.ended) {
let location: CGPoint = sender.location(in: self.view)
if (!self.view.point(inside: location, with: nil)) {
self.view.window?.removeGestureRecognizer(sender)
self.close(sender: sender)
}
}
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
}

Answer 4

As far as I can tell none of the answer seem to be working right away in every condition.
My solution (either inherit from it or paste it in):
#interface MyViewController () <UIGestureRecognizerDelegate>
#property (strong, nonatomic) UITapGestureRecognizer *tapOutsideRecognizer;
#end
-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
if (!self.tapOutsideRecognizer) {
self.tapOutsideRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapBehind:)];
self.tapOutsideRecognizer.numberOfTapsRequired = 1;
self.tapOutsideRecognizer.cancelsTouchesInView = NO;
self.tapOutsideRecognizer.delegate = self;
[self.view.window addGestureRecognizer:self.tapOutsideRecognizer];
}
}
-(void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
// to avoid nasty crashes
if (self.tapOutsideRecognizer) {
[self.view.window removeGestureRecognizer:self.tapOutsideRecognizer];
self.tapOutsideRecognizer = nil;
}
}
#pragma mark - Actions
- (IBAction)close:(id)sender
{
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)handleTapBehind:(UITapGestureRecognizer *)sender
{
if (sender.state == UIGestureRecognizerStateEnded)
{
CGPoint location = [sender locationInView:nil]; //Passing nil gives us coordinates in the window
//Then we convert the tap's location into the local view's coordinate system, and test to see if it's in or outside. If outside, dismiss the view.
if (![self.view pointInside:[self.view convertPoint:location fromView:self.view.window] withEvent:nil])
{
// Remove the recognizer first so it's view.window is valid.
[self.view.window removeGestureRecognizer:sender];
[self close:sender];
}
}
}
#pragma mark - Gesture Recognizer
// because of iOS8
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
return YES;
}

Answer 5

Here is my version that works for iOS 7 and iOS 8 and does not require conditional swapping of coordinates:
- (void)handleTapBehind:(UITapGestureRecognizer *)sender
{
if (sender.state == UIGestureRecognizerStateEnded)
{
CGPoint location = [sender locationInView:self.view];
if (![self.view pointInside:location withEvent:nil]) {
[self.view.window removeGestureRecognizer:self.recognizer];
[self dismissViewControllerAnimated:YES completion:nil];
}
}
}

Answer 6

For iOS 8, you must both implement the UIGestureRecognizer per Martino's answer, and swap the (x,y) coordinates of the tapped location when in landscape orientation. Not sure if this is due to an iOS 8 bug.
- (void) viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
// add gesture recognizer to window
UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapBehind:)];
[recognizer setNumberOfTapsRequired:1];
recognizer.cancelsTouchesInView = NO; //So the user can still interact with controls in the modal view
[self.view.window addGestureRecognizer:recognizer];
recognizer.delegate = self;
}
- (void)handleTapBehind:(UITapGestureRecognizer *)sender
{
if (sender.state == UIGestureRecognizerStateEnded) {
// passing nil gives us coordinates in the window
CGPoint location = [sender locationInView:nil];
// swap (x,y) on iOS 8 in landscape
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(#"8.0")) {
if (UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation)) {
location = CGPointMake(location.y, location.x);
}
}
// convert the tap's location into the local view's coordinate system, and test to see if it's in or outside. If outside, dismiss the view.
if (![self.view pointInside:[self.view convertPoint:location fromView:self.view.window] withEvent:nil]) {
// remove the recognizer first so it's view.window is valid
[self.view.window removeGestureRecognizer:sender];
[self dismissViewControllerAnimated:YES completion:nil];
}
}
}
#pragma mark - UIGestureRecognizer Delegate
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
return YES;
}

Answer 7

Based on Bart van Kuik's answer and NavAutoDismiss and other great snippets here.
class DismissableNavigationController: UINavigationController, UIGestureRecognizerDelegate {
private var tapOutsideRecognizer: UITapGestureRecognizer!
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
if tapOutsideRecognizer == nil {
tapOutsideRecognizer = UITapGestureRecognizer(target: self, action: #selector(DismissableNavigationController.handleTapBehind))
tapOutsideRecognizer.numberOfTapsRequired = 1
tapOutsideRecognizer.cancelsTouchesInView = false
tapOutsideRecognizer.delegate = self
view.window?.addGestureRecognizer(tapOutsideRecognizer)
}
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
if tapOutsideRecognizer != nil {
view.window?.removeGestureRecognizer(tapOutsideRecognizer)
tapOutsideRecognizer = nil
}
}
func close(sender: AnyObject) {
dismissViewControllerAnimated(true, completion: nil)
}
func handleTapBehind(sender: UITapGestureRecognizer) {
if sender.state == UIGestureRecognizerState.Ended {
var location: CGPoint = sender.locationInView(nil)
if UIInterfaceOrientationIsLandscape(UIApplication.sharedApplication().statusBarOrientation) {
location = CGPoint(x: location.y, y: location.x)
}
if !view.pointInside(view.convertPoint(location, fromView: view.window), withEvent: nil) {
view.window?.removeGestureRecognizer(sender)
close(sender)
}
}
}
func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
}
Usage:
let vc = MyViewController()
let nc = DismissableNavigationController(rootViewController: vc)
nc.modalPresentationStyle = UIModalPresentationStyle.FormSheet
presentViewController(nc, animated: true, completion: nil)

Answer 8

#yershuachu's answer, in Swift 2:
class ModalParentViewController: UIViewController, UIGestureRecognizerDelegate {
private var tapOutsideRecognizer: UITapGestureRecognizer!
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
if(self.tapOutsideRecognizer == nil) {
self.tapOutsideRecognizer = UITapGestureRecognizer(target: self, action: "handleTapBehind:")
self.tapOutsideRecognizer.numberOfTapsRequired = 1
self.tapOutsideRecognizer.cancelsTouchesInView = false
self.tapOutsideRecognizer.delegate = self
self.view.window?.addGestureRecognizer(self.tapOutsideRecognizer)
}
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
if(self.tapOutsideRecognizer != nil) {
self.view.window?.removeGestureRecognizer(self.tapOutsideRecognizer)
self.tapOutsideRecognizer = nil
}
}
func close(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil)
}
func handleTapBehind(sender: UITapGestureRecognizer) {
if (sender.state == UIGestureRecognizerState.Ended) {
let location: CGPoint = sender.locationInView(nil)
if (!self.view.pointInside(self.view.convertPoint(location, fromView: self.view.window), withEvent: nil)) {
self.view.window?.removeGestureRecognizer(sender)
self.close(sender)
}
}
}
func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
}

Answer 9

Swift 3
class ModalParentViewController: UIViewController, UIGestureRecognizerDelegate {
private var tapOutsideRecognizer: UITapGestureRecognizer!
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
if(self.tapOutsideRecognizer == nil) {
self.tapOutsideRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.handleTapBehind))
self.tapOutsideRecognizer.numberOfTapsRequired = 1
self.tapOutsideRecognizer.cancelsTouchesInView = false
self.tapOutsideRecognizer.delegate = self
appDelegate.window?.addGestureRecognizer(self.tapOutsideRecognizer)
}
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
if(self.tapOutsideRecognizer != nil) {
appDelegate.window?.removeGestureRecognizer(self.tapOutsideRecognizer)
self.tapOutsideRecognizer = nil
}
}
func close(sender: AnyObject) {
self.dismiss(animated: true, completion: nil)
}
// MARK: - Gesture methods to dismiss this with tap outside
func handleTapBehind(sender: UITapGestureRecognizer) {
if (sender.state == UIGestureRecognizerState.ended) {
let location: CGPoint = sender.location(in: nil)
if (!self.view.point(inside: self.view.convert(location, from: self.view.window), with: nil)) {
self.view.window?.removeGestureRecognizer(sender)
self.close(sender: sender)
}
}
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
}

Answer 10

Ah ok. So I'm afraid thats not quite possible using the presentModalViewController: method. The whole idea of a "modal" view/window/message box/etc. pp. is that the user cannot do anything else than processing whatever the view/window/message box/etc. pp. wants him/her to do.
What you want to do instead is not present a modal view controller, but rather load and show your form view controller the regular way. Note in your master controller that the form is just showing e.g. with a BOOL variable and then handle there any taps that might occur. If your form is showing, dismiss it.

Answer 11

I use it in this form without any problems neither on iOS 7.1 nor iOS 8.3.
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[self.view.window addGestureRecognizer:self.tapBehindGesture];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self.view.window removeGestureRecognizer:self.tapBehindGesture];
}
- (UITapGestureRecognizer*)tapBehindGesture
{
if (_tapBehindGesture == nil)
{
_tapBehindGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapBehindRecognized:)];
_tapBehindGesture.numberOfTapsRequired = 1;
_tapBehindGesture.cancelsTouchesInView = NO;
_tapBehindGesture.delegate = self;
}
return _tapBehindGesture;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}

Answer 12

FYI, on iOS 13 form sheets now have a standard dismiss gesture - they go away when you touch anywhere inside the modal and swipe it down (set the new isModalInPresentation property to false if you want to prevent that).

Answer 13

I made a navigationController that auto dismiss for iPad
https://github.com/curciosobrinho/NavAutoDismiss
It is just the same code as above, working on iOS 8.
So, all the credits go to the people above.
I just did it to be more generic and easier to use.
You just need to copy BOTH files to your project
Import the header file (.h)
And use your viewcontroller (that you want to show) as the rootViewController.
How to use it:
//Import the .h file
#import "NavDismissViewController.h"
//Instanciate your view controller (the view you want to present)
YourViewController * yourVC = [YourViewController new];
//Instanciate the NavDismissViewController with your view controller as the rootViewController
NavDismissViewController *nav = [[NavDismissViewController alloc] initWithRootViewController:yourVC];
//if you want to change the navigationBar translucent behaviour
[nav.navigationBar setTranslucent:NO];
//Choose the Modal style
nav.modalPresentationStyle=UIModalPresentationFormSheet;
//present your controller
[self presentViewController:nav animated:YES completion:nil];
//Done

Answer 14

Based on some of the questions and with some improvements and updates:
- (void)tapOutsideDetected:(UITapGestureRecognizer *)sender {
if (#available(iOS 13, *)) {} else {
UIView *aView = self.navigationController ? self.navigationController.view : self.view;
CGPoint location = [sender locationInView: aView];
if (![aView pointInside:location withEvent:nil]) {
[self removeGestureRecognizer:sender];
[self dismissViewControllerAnimated:YES completion:nil];
}
}
}
Where:
- (void) removeGestureRecognizer:(UIGestureRecognizer *) gesture {
if (self.recognizer) {
UIView *aView = self.recognizer.view;
if (aView) {
[aView removeGestureRecognizer:self.recognizer];
}
}
}
In this case, the UITapGestureRecognizer has been applied to the UIViewController