Following is the code I have written to put 2 finger swipe on UITableView :
UISwipeGestureRecognizer *leftSwipe = [UISwipeGestureRecognizer new];
[leftSwipe addTarget:self action:#selector(nextDay)];
leftSwipe.numberOfTouchesRequired = 2;
leftSwipe.direction = UISwipeGestureRecognizerDirectionLeft;
leftSwipe.delegate = self;
[leftSwipe setCancelsTouchesInView:YES];
[tableViewTasks addGestureRecognizer:leftSwipe];
UISwipeGestureRecognizer *rightSwipe = [UISwipeGestureRecognizer new];
[rightSwipe addTarget:self action:#selector(previousDay)];
rightSwipe.numberOfTouchesRequired = 2;
rightSwipe.direction = UISwipeGestureRecognizerDirectionRight;
rightSwipe.delegate = self;
[rightSwipe setCancelsTouchesInView:YES];
[tableViewTasks addGestureRecognizer:rightSwipe];
I am using SWTableViewCell which has left and right (single tap) gestureRecognisers.
When UITableView is swiped left/right using 2 fingers, SWTableViewCell left and right gestures are also fired after that.
How to stop the conflict ?
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
if (SWTableViewCellTouch) {
SWTableViewCellTouch = NO
return NO;
}
return YES;
}
when you touch the SWTableViewCell set a BOOL SWTableViewCellTouch to YES.
The possible solution is enable/disable the BOOl (SWTableViewCellTouch) in the touchesBegan: method as below.
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
if ([[event touchesForView:self] count] > 1) {
// Its two finger touch so set the BOOL false like
SWTableViewCellTouch = NO;
}
else if ([[event touchesForView:self] count] == 1){
// Its sigle finger touch so set the BOOL true like
SWTableViewCellTouch = YES;
}
[super touchesBegan:touches withEvent:event] ;}
Hope this will help you.
1. Implement UIGestureRecognizerDelegate in your UIViewController
2. Set leftSwipe.delegate = self; and leftSwipe.delegate = self;
3. Now check if the in its Delegate Method if UISwipeGesture have how many numberOfTouchesRequired
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
if ( [gestureRecognizer isMemberOfClass:[UISwipeGestureRecognizer class]] ) {
UISwipeGestureRecognizer *swipeGesture=(UISwipeGestureRecognizer *)gestureRecognizer ;
if(swipeGesture.numberOfTouchesRequired!=2)
{
//if Double not Double Swipe Touch Don't Linsten Gesture in your Viewcontroller
return NO;
}
}
return YES;
}
i hope this will solve your problem
Related
Here is the code:
This section is written on **-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath**
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(imageDispalyFullScreenTapped:)];
singleTap.numberOfTapsRequired = 1;
singleTap.delegate=self;
cell.imgDisplay.userInteractionEnabled = YES;
[cell.imgDisplay addGestureRecognizer:singleTap];
Next I have implemented the delegate, i.e. **UIGestureRecognizerDelegate**
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
return YES;
}
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
return YES;
}
Now implemented the selector when UIImageView getting tapped
-(void)imageDispalyFullScreenTapped:(UITapGestureRecognizer*)gesture
{
UIView *tappedView = gesture.view;
UITableViewCell *cell=[self getSuperViewOfType:[UITableViewCell class] FromView:tappedView];
NSIndexPath *indexPath=[tblChat indexPathForCell:cell];
Sock_ModelChat *objChat=[arrDisplay objectAtIndex:indexPath.row];
if ([objChat.strUrlLocal stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]].length>0) {
imgSelectedDisplay=[[Sock_DB sharedInstance] getImageForName:objChat.strUrlLocal];
ImageDisplayerViewController *imageDisplayer=[ImageDisplayerViewController sharedInstance];
imageDisplayer.delegate=self;
[self addChildViewController:imageDisplayer];
imageDisplayer.view.frame=CGRectMake(0, 0, CGRectGetWidth([UIScreen mainScreen].bounds), CGRectGetHeight([UIScreen mainScreen].bounds));
[self.view addSubview:imageDisplayer.view];
[imageDisplayer didMoveToParentViewController:self];
}
}
But the problem is whenever tapping on the border side or edge side of the image view, the tap on image view getting detected and the selector imageDispalyFullScreenTapped fired.But when tapping on the center or near the center, tap is not getting detected and so the related selctor also not firing.
I am working on XCode Version 8.0 (8A218a) and iOS 10.0.
May be UserInteraction is disabled in your case
then you can add gesture like :
let gesture:UITapGestureRecognizer = UITapGestureRecognizer.init(target:self, action:#selector(handleTap))
gesture.numberOfTapsRequired = 1
gesture.delegate = self
cell.imageView?.addGestureRecognizer(gesture)
then add below function in your viewcontroller
func handleTap(sender: UITapGestureRecognizer? = nil) {}
I believe I have an issue with UITapGestureRecognizer for dismissing keyboard when tapping in chatroom area preventing or blocking touch to the previewCancelButton. Here below are my relevant codes:
BaseTemplateVC.m
- (void)addDismissKeyboardGesture {
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(dismissKeyboard:)];
tapGesture.cancelsTouchesInView = NO;
tapGesture.delegate = self;
self.view.tag = 111;
[self.view addGestureRecognizer:tapGesture];
}
- (void) dismissKeyboard:(id)sender {
UITapGestureRecognizer *gesture = sender;
UIView *view = gesture.view;
NSLog(#"%ld", (long)view.tag);
[self.view endEditing:YES];
}
ChatroomVC.m
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
//Disallow recognition of tap gestures in the segmented control.
if (([touch.view isKindOfClass:[UIButton class]])) {
NSLog(#"noooooooo");
return NO;
}
return YES;
NSLog(#"yesssssss");
}
InputFunctionView.m
- (void)selectedSticker:(NSString *)stickerURLString {
/* Sticker preview subview */
stickerPreviewView = [[UIImageView alloc] initWithFrame:CGRectMake(0, -120, FrameWidth, 120)];
stickerPreviewView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.5f];
stickerPreviewView.userInteractionEnabled = YES;
[self addSubview:stickerPreviewView];
[self bringSubviewToFront:stickerPreviewView];
/* Initialise previewCancelButton */
self.previewCancelButton = [UIButton buttonWithType:UIButtonTypeCustom];
self.previewCancelButton.frame = CGRectMake(Main_Screen_Width-30, SpaceForItems-120, 20, 20);
[self.previewCancelButton setBackgroundImage:[UIImage imageNamed:#"btn_previewcancel.png"] forState:UIControlStateNormal];
[self.previewCancelButton setBackgroundImage:[UIImage imageNamed:#"btn_previewcancel.png"] forState:UIControlStateHighlighted];
[self.previewCancelButton addTarget:self action:#selector(cancelStickerPreviewButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview: self.previewCancelButton];
}
/* Cancel sticker preview subview */
- (void)cancelStickerPreviewButtonPressed:(id)sender {
NSLog(#"cancel sticker preview");
[self.previewCancelButton removeFromSuperview];
[stickerPreviewView removeFromSuperview];
}
Now the previewCancelButton is correctly on right top corner of stickerPreviewView but unable to receive touch event to it. When I touch the button it shows "111" in the console and when I traced back I found BaseTemplateVC.m that contains addDismissKeyboardGesture method, so I believe this may cause the issue.
Anyone can guide me to some solutions. That'd be really appreciated. Thanks in advance.
Progress: I have modified gestureRecognizer method in ChatroomVC.m so now it can ignore tap gesture on the button but the problem remains action for the button doesn't get fired.
Just take a try with this, i guess it will work.
Use the shouldReceiveTouch delegate method of gesture, and return NO when the touch.view is button class.
So when it finds button It will discard the gesture and take button action.
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
// Block the recognition of tap gestures in the button.
if (([touch.view isKindOfClass:[UIButton class]])) {
return NO;
}
return YES;
}
Here is the demo implementation :
I have taken the button on main view of view controller in the story board.
- (void)viewDidLoad {
[super viewDidLoad];
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapGestureClicked:)];
tapGesture.delegate = self;
[self.view addGestureRecognizer:tapGesture];
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
// Disallow recognition of tap gestures in the segmented control.
if (([touch.view isKindOfClass:[UIButton class]])) {
return NO;
}
return YES;
}
- (IBAction)btnTestClicked:(UIButton *)sender {
NSLog(#"test button click");
}
- (void)tapGestureClicked:(UIGestureRecognizer *)recog
{
NSLog(#"tap gesture clicked");
}
Hope it helps.
Happy coding ...
I found a solution to this by using below code in GestureRecogniser delegate method:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
if ([touch.view isDescendantOfView:IFView.stickerPreviewView]) {
return NO;
}
return YES;
}
It specifies exactly what subview in this case IFView.stickerPreviewView is to return NO. Also in InputFunctionView, use this instead to add the subview:
[self.superview addSubview:_stickerPreviewView];
i am creating drawer
self.isShowMenuVC = NO;
_menuView = [MenuViewController viewController];
[self.menuView setDelegate:self];
[self addChildViewController:self.menuView];
[self.menuView.view setFrame:CGRectMake(-kMenuTableWidth, 0, kMenuTableWidth, self.view.frame.size.height)];
[self.view addSubview:self.menuView.view];
[self.menuView didMoveToParentViewController:self];
UITapGestureRecognizer *outsideTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(outsideTapped:)];
[self.view addGestureRecognizer:outsideTap];
outsideTap.delegate = self;
and when button tap i just set frame of _menuView.view to behave like a drawer
what i want is to detect touch outside of drawer but i am not able to do it
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
if (touch.view == self.menuView.view) {
NSLog(#"Touch Drawer");
} else {
NSLog(#"Touch Outside");
}
return YES;
}
but it is always show Touch Outside"
i am missing something but don't know what thanks in advance
Also try with 2 gesture but not working because one gesture in self.view so, when i tap in drawer method call 2 times.
for that i tried to disable one gesture, still calling two times
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
if (gestureRecognizer == self.touchInDrawer) {
NSLog(#"Touch in drawer");
[self.touchOutSideDrawer setEnabled:NO];
} else {
NSLog(#"Outside");
[self hideMenuView];
}
return YES;
}
The UITapGestureRecognizer cannot detect the touch outside the view which it belongs to.
You need to create another UITapGestureRecognizer and add them to self.menuView.view.
Also you can make two #property for your gesture recognizers and check them inside method:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
if (gestureRecognizer == self.firstGesture) {
NSLog(#"Touch in first gesture");
} else {
NSLog(#"Touch in another gesture");
}
I have solve this issue with adding two gesture
#property (strong,nonatomic) UITapGestureRecognizer *touchInDrawer;
#property (strong,nonatomic) UITapGestureRecognizer *touchOutSideDrawer;
as per #Eugene Zaychenko's Answer but there is still problem because delegate method calling two times
also i can't [self.touchOutSideDrawer setEnabled:NO]; when touch in drawer tapped, because after that it will remove from the view and never executed again if [self.touchOutSideDrawer setEnabled:YES];
but most interesting thing is
_touchInDrawer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(outsideTapped:)];
[self.menuView.view addGestureRecognizer:self.touchInDrawer];
self.touchInDrawer.delegate = self;
_touchOutSideDrawer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(outsideTapped:)];
[self.view addGestureRecognizer:self.touchOutSideDrawer];
self.touchOutSideDrawer.delegate = self;
outsideTapped method calling only one time so i shifted my all code there and is working
- (void) outsideTapped:(UITapGestureRecognizer *)gestureRecognizer {
if (gestureRecognizer == self.touchOutSideDrawer) {
// [self.view removeGestureRecognizer:self.touchOutSideDrawer];
[self hideMenuView];
NSLog(#"Outside");
} else {
NSLog(#"Touch in drawer");
// [self.touchOutSideDrawer setEnabled:NO];
}
}
I have this snippet of code in the viewDidLoad of my ViewController
UILongPressGestureRecognizer* gestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(_handleLongPress:)];
gestureRecognizer.numberOfTouchesRequired = 1;
gestureRecognizer.minimumPressDuration = 5.0;
gestureRecognizer.delegate = self;
[self.view addGestureRecognizer:gestureRecognizer];
NSLog(#"Gesture recognizers = %#",self.view.gestureRecognizers);
and the methods
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
return YES;
}
- (void) _handleLongPress:(UIGestureRecognizer *)sender
{
if (sender.state == UIGestureRecognizerStateBegan)
NSLog(#"Started");
}
When I run this app and click on the view for 5 seconds the _handleLongPress gets trigger, however when I run the same app on the device it never hits the _handleLongPress method.. what am I missing? I do see the output that there is the long press :
2014-08-01 10:00:48.505 TestConsole[1343:60b] Gesture recognizers = (
"UILongPressGestureRecognizer: 0x14644d30; state = Possible; view = UIView 0x1453f950>; target= <(action= _handleLongPress:, target=MyViewController 0x1463a730>)>"
I put breakpoints at gestureRecognizer:shouldReceiveTouch: and it does hit that the UILongPressGestureRecognizer.. I am dumbfounded!
I would like to give a UIButton different features depending on if it is pressed and released once, or held down (ideally for 1.5 sec) and moved around the screen. I am using this code at the moment:
[button addTarget:self action:#selector(open:)
forControlEvents:UIControlEventTouchDown]
panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(move:)];
[panRecognizer setMinimumNumberOfTouches:1];
[panRecognizer setMaximumNumberOfTouches:1];
[panRecognizer setDelegate:self];
[button addGestureRecognizer:panRecognizer];
-(IBAction)open:(id)sender {}
-(void)move:(id)sender{}
move: works fine, but open: doesn't.
maybe you can use button's drag event, like
[button addTarget:self action:#selector(wasDragged:withEvent:)
forControlEvents:UIControlEventTouchDragInside];
You can look at this link: http://www.cocoanetics.com/2010/11/draggable-buttons-labels/
you can put a flag in move mehod, when enter touch up method, you check if the button has moved, to decide to trigger open related logic
#define BUTTON_DRAGGED_TAG -100
#define BUTTON_DEFAULT_TAG 0
- (void)onButtonTouchUpInside:(UIButton *)button withEvent:(UIEvent *)event
{
if (button.tag != BUTTON_DRAGGED_TAG)
{
//doOpen
}
button.tag = BUTTON_DEFAULT_TAG;
}
- (void)onButtonTouchUpOutside:(UIButton *)button withEvent:(UIEvent *)event
{
button.tag = BUTTON_DEFAULT_TAG;
}
- (void)onButtonTouchCancel:(UIButton *)button withEvent:(UIEvent *)event
{
button.tag = BUTTON_DEFAULT_TAG;
}
- (void)onButtonDraged:(UIButton *)button withEvent:(UIEvent *)event
{
button.tag = BUTTON_DRAGGED_TAG;
}
I did this, let me know if it works for you:
- (void)viewDidLoad
{
[super viewDidLoad];
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(didRecognizeTapGesture:)];
tapGesture.cancelsTouchesInView = NO;
tapGesture.delegate = self;
[tapGesture requireGestureRecognizerToFail:self.scrollView.panGestureRecognizer];
[self.scrollView addGestureRecognizer:tapGesture];
self.tapGesture = tapGesture;
}
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
if (touch.view == self.button)
{
return NO;
}
return YES;
}
- (void)didRecognizeTapGesture:(UITapGestureRecognizer*)gesture
{
if (gesture.state == UIGestureRecognizerStateEnded)
{
NSLog(#"GESTURE ENDED");
}
}
- (void)didPressButton:(UIButton*)sender
{
NSLog(#"BUTTON TOUCH UP INSIDE");
}