tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self
action:#selector(handleTapGesture:)];
tapGesture.numberOfTapsRequired = 2;
tapGesture.numberOfTouchesRequired = 1;
[self.view addGestureRecognizer:tapGesture];
[tapGesture release];
and
- (void)handleTapGesture:(UITapGestureRecognizer *)sender {
if (sender.state == UIGestureRecognizerStateRecognized) {
// handling code
NSLog(#"We got double tap here");
DashBoardViewController* dashboardObj = [[DashBoardViewController alloc] initWithNibName:#"DashBoardViewController" bundle:nil];
[self.navigationController pushViewController:dashboardObj animated:YES];
}
what i am trying to do is , i want to call 2 different events on single tap and on double tap.
So how can i detect when tap==1 and tap==2?
Double tap is recognised in my code, but i am not sure, how to find and work,when a single tap is find.
Thanks
This may give u a soln
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleSingleTap:)];
UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleDoubleTap:)];
[doubleTap setNumberOfTapsRequired:2];
[singleTap setNumberOfTouchesRequired:1];
[self.view addGestureRecognizer:singleTap];
[self.view addGestureRecognizer:doubleTap];
- (void)handleSingleTap:(UIGestureRecognizer *)gestureRecognizer {
// single tap action
}
- (void)handleDoubleTap:(UIGestureRecognizer *)gestureRecognizer {
// double tap action
}
or u have to use NSTimer as darren pointed to validate the single touch.
In the method,
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
Following seems to a good post about touch in iOS.
http://www.sitepen.com/blog/2008/07/10/touching-and-gesturing-on-the-iphone/
Related
I am trying to add 2 UITapGestureRecognizers to a view, one for single tap and one for double tap events. The single tap recognizer is working as expected (on its own). But I don't seem to be able to get the double tap recognizer working.
Have tried to experiment with properties like : cancelsTouchesInView, delaysTouchesBegan and delaysTouchesEnded but still doesn't work.
When I double tap, the single tap recognizer would always be activated and the double tap event would also be sent to the super view. But the custom double tap recognizer does not seem to be notified at all.
Documentations seem to suggest that the 3 properties mentioned above could be used for the purpose. But I am just not sure what values should be set and on which recognizer(s) (single, double or both). Hope somebody familiar with this could help.
The following is the latest updated code block.
// ****** gesture recognizers ******
- (void)addSingleAndDoubleTapGestureRecognizersToView:(UIView *)view
{
// single tap
UITapGestureRecognizer *singleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget: tableViewController action: #selector(handleSingleTapOnView:)];
[singleTapRecognizer setNumberOfTouchesRequired:1];
[view addGestureRecognizer: singleTapRecognizer];
// double tap
UITapGestureRecognizer *doubleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget: tableViewController action: #selector (handleDoubleTapOnView:)];
[doubleTapRecognizer setNumberOfTouchesRequired:2];
[singleTapRecognizer requireGestureRecognizerToFail: doubleTapRecognizer];
[view addGestureRecognizer: doubleTapRecognizer];
}
- (void)handleSingleTapOnView:(id)sender
{
}
- (void)handleDoubleTapOnView:(id)sender
{
}
UITapGestureRecognizer *singleTap = [[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(doSingleTap)] autorelease];
singleTap.numberOfTapsRequired = 1;
[self.view addGestureRecognizer:singleTap];
UITapGestureRecognizer *doubleTap = [[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(doDoubleTap)] autorelease];
doubleTap.numberOfTapsRequired = 2;
[self.view addGestureRecognizer:doubleTap];
[singleTap requireGestureRecognizerToFail:doubleTap];
Note: If you are using numberOfTouchesRequired it has to be .numberOfTouchesRequired = 1;
For Swift
let singleTapGesture = UITapGestureRecognizer(target: self, action: #selector(didPressPartButton))
singleTapGesture.numberOfTapsRequired = 1
view.addGestureRecognizer(singleTapGesture)
let doubleTapGesture = UITapGestureRecognizer(target: self, action: #selector(didDoubleTap))
doubleTapGesture.numberOfTapsRequired = 2
view.addGestureRecognizer(doubleTapGesture)
singleTapGesture.require(toFail: doubleTapGesture)
Swift 3 solution:
let singleTap = UITapGestureRecognizer(target: self, action:#selector(self.singleTapAction(_:)))
singleTap.numberOfTapsRequired = 1
view.addGestureRecognizer(singleTap)
let doubleTap = UITapGestureRecognizer(target: self, action:#selector(self.doubleTapAction(_:)))
doubleTap.numberOfTapsRequired = 2
view.addGestureRecognizer(doubleTap)
singleTap.require(toFail: doubleTap)
In the code line singleTap.require(toFail: doubleTap) we are forcing the single tap to wait and ensure that the tap event is not a double tap.
You need to use the requireGestureRecognizerToFail: method. Something like this:
[singleTapRecognizer requireGestureRecognizerToFail:doubleTapRecognizer];
//----firstly you have to alloc the double and single tap gesture-------//
UITapGestureRecognizer* doubleTap = [[UITapGestureRecognizer alloc] initWithTarget : self action : #selector (handleDoubleTap:)];
UITapGestureRecognizer* singleTap = [[UITapGestureRecognizer alloc] initWithTarget : self action : #selector (handleSingleTap:)];
[singleTap requireGestureRecognizerToFail : doubleTap];
[doubleTap setDelaysTouchesBegan : YES];
[singleTap setDelaysTouchesBegan : YES];
//-----------------------number of tap----------------//
[doubleTap setNumberOfTapsRequired : 2];
[singleTap setNumberOfTapsRequired : 1];
//------- add double tap and single tap gesture on the view or button--------//
[self.view addGestureRecognizer : doubleTap];
[self.view addGestureRecognizer : singleTap];
Not sure if that's exactly what are you looking for, but I did single/double taps without gesture recognizers. I'm using it in a UITableView, so I used that code in the didSelectRowAtIndexPath method
tapCount++;
switch (tapCount)
{
case 1: //single tap
[self performSelector:#selector(singleTap:) withObject: indexPath afterDelay: 0.2];
break;
case 2: //double tap
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:#selector(singleTap:) object:indexPath];
[self performSelector:#selector(doubleTap:) withObject: indexPath];
break;
default:
break;
}
if (tapCount>2) tapCount=0;
Methods singleTap and doubleTap are just void with NSIndexPath as a parameter:
- (void)singleTap:(NSIndexPath *)indexPath {
//do your stuff for a single tap
}
- (void)doubleTap:(NSIndexPath *)indexPath {
//do your stuff for a double tap
}
Hope it helps
Solution for Swift 2:
let singleTapGesture = UITapGestureRecognizer(target: self, action: #selector(handleSingleTap))
singleTapGesture.numberOfTapsRequired = 1 // Optional for single tap
view.addGestureRecognizer(singleTapGesture)
let doubleTapGesture = UITapGestureRecognizer(target: self, action: #selector(handleDoubleTap))
doubleTapGesture.numberOfTapsRequired = 2
view.addGestureRecognizer(doubleTapGesture)
singleTapGesture.requireGestureRecognizerToFail(doubleTapGesture)
I implemented UIGestureRecognizerDelegate methods to detect both singleTap and doubleTap.
Just do this .
UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(handleDoubleTapGesture:)];
[doubleTap setDelegate:self];
doubleTap.numberOfTapsRequired = 2;
[self.headerView addGestureRecognizer:doubleTap];
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(handleSingleTapGesture:)];
singleTap.numberOfTapsRequired = 1;
[singleTap setDelegate:self];
[doubleTap setDelaysTouchesBegan:YES];
[singleTap setDelaysTouchesBegan:YES];
[singleTap requireGestureRecognizerToFail:doubleTap];
[self.headerView addGestureRecognizer:singleTap];
Then implement these delegate methods.
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
return YES;
}
Some view have there own double tap recognizers built in (MKMapView being an example). To get around this you will need to implement UIGestureRecognizerDelegate method shouldRecognizeSimultaneouslyWithGestureRecognizer and return YES:
First implement your double and single recognizers:
// setup gesture recognizers
UITapGestureRecognizer* singleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self
action:#selector(mapViewTapped:)];
singleTapRecognizer.delegate = self;
singleTapRecognizer.numberOfTapsRequired = 1;
UITapGestureRecognizer* doubleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self
action:#selector(mapViewDoubleTapped:)];
doubleTapRecognizer.delegate = self; // this allows
doubleTapRecognizer.numberOfTapsRequired = 2;
[singleTapRecognizer requireGestureRecognizerToFail:doubleTapRecognizer];
And then implement:
#pragma mark UIGestureRecognizerDelegate
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer
*)otherGestureRecognizer { return YES; }
In reference to #stanley's comment -
Don't try and use tap gestures to row selections to work in UITableView as it already has full tap handling....
But you must set 'Cancels Touches in View' to 'NO' on your single tap gesture recognizers or it will never get the tap events.
I have a tutorial for my app, which should display only the first time the app is opened and should be tapped to dismiss.
I am initializing a UITapGestureRecognizer in my viewDidLoad:
tapper_tut = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleSingleTap:)];
tapper_tut.cancelsTouchesInView = FALSE;
[self.view addGestureRecognizer:tapper_tut];
and I have an IBAction to detect the tap and set the tutorial to hidden:
- (IBAction)dismiss_tut{
if (????????????????) {
_tutorial.hidden = YES;
}
}
But I have no idea what to put in the if statement condition, or if this is even that right way to go about this.
How would I dismiss a UIImageView on a tap?
UITapGestureRecognizer *gr = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleGesture:)];
[self.view addGestureRecognizer:gr];
// if not using ARC, you should [gr release];
// mySensitiveRect coords are in the coordinate system of self.view
- (void)handleGesture:(UIGestureRecognizer *)gestureRecognizer {
CGPoint p = [gestureRecognizer locationInView:self.view];
if (CGRectContainsPoint(mySensitiveRect, p)) {
NSLog(#"got a tap in the region i care about");
} else {
NSLog(#"got a tap, but not where i need it");
}
}
You can make viewDidLoad like this
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
/* Create the Tap Gesture Recognizer */
self.tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self
action:#selector(handleTaps:)];
/* The number of fingers that must be on the screen */
self.tapGestureRecognizer.numberOfTouchesRequired = 1;
/* The total number of taps to be performed before the gesture is recognized */
self.tapGestureRecognizer.numberOfTapsRequired = 1;
/* Add this gesture recognizer to the view */
[self.view addGestureRecognizer:self.tapGestureRecognizer];
}
To detect the taps you can make the method like this.
- (void) handleTaps:(UITapGestureRecognizer*)paramSender
{
NSUInteger touchCounter = 0;
for (touchCounter = 0;touchCounter < paramSender.numberOfTouchesRequired;touchCounter++)
{
CGPoint touchPoint =[paramSender locationOfTouch:touchCounter inView:paramSender.view];
NSLog(#"Touch #%lu: %#",(unsigned long)touchCounter+1, NSStringFromCGPoint(touchPoint));
}
}
you have to declare .h file as "UIGestureRecognizerDelegate"
you have getting tap of gesture as two way as given below steps.
1) Call delegate method of GestureRecognizer (not given action )
UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:nil]; // not given action.
recognizer.numberOfTouchesRequired=1;// here how many tap you want set it
[self.view addGestureRecognizer:recognizer];
recognizer.delegate = self;
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
//whatever you want write code here
return NO;
}
2) given action
UITapGestureRecognizer *oneTouch=[[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(Addphoto)];
[oneTouch setNumberOfTouchesRequired:1];
[self.view addGestureRecognizer:oneTouch];
-(IBAction)Addphoto
{
//whatever you want write code here
}
may be it will help .
I think u need to detect the first time launch of the application which u can do with following
![[NSUserDefaults standardUserDefaults] boolForKey:#"HasLaunchedOnce"]
Put this in your if statement .
I have an ImageView when clicked on that imageview, transparent circle should be created and again when double clicking on that circle, particular Image in that circle area should be zoomed.Any suggestion would be appreciated.
I think this code will helpfull to you
- (id)initWithImage:(UIImage *)image {
self = [super initWithImage:image];
if (self) {
[self setUserInteractionEnabled:YES];
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleSingleTap:)];
UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleDoubleTap:)];
UITapGestureRecognizer *twoFingerTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTwoFingerTap:)];
[doubleTap setNumberOfTapsRequired:2];
[twoFingerTap setNumberOfTouchesRequired:2];
[self addGestureRecognizer:singleTap];
[self addGestureRecognizer:doubleTap];
[self addGestureRecognizer:twoFingerTap];
[singleTap release];
[doubleTap release];
[twoFingerTap release];
}
return self;
}
#pragma mark Private
- (void)handleSingleTap:(UIGestureRecognizer *)gestureRecognizer {
if ([delegate respondsToSelector:#selector(tapDetectingImageView:gotSingleTapAtPoint:)])
[delegate tapDetectingImageView:self gotSingleTapAtPoint:[gestureRecognizer locationInView:self]];
}
- (void)handleDoubleTap:(UIGestureRecognizer *)gestureRecognizer {
if ([delegate respondsToSelector:#selector(tapDetectingImageView:gotDoubleTapAtPoint:)])
[delegate tapDetectingImageView:self gotDoubleTapAtPoint:[gestureRecognizer locationInView:self]];
}
- (void)handleTwoFingerTap:(UIGestureRecognizer *)gestureRecognizer {
if ([delegate respondsToSelector:#selector(tapDetectingImageView:gotTwoFingerTapAtPoint:)])
[delegate tapDetectingImageView:self gotTwoFingerTapAtPoint:[gestureRecognizer locationInView:self]];
}
I am developing an app in which what i want is when a user clicks on an image in an image view
An Action should be fired(like when a button is clicked).
I don't want button image. I just want an image view and action on it.
Kindly help.
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapDetected)];
singleTap.numberOfTapsRequired = 1;
imageView.userInteractionEnabled = YES;
[imageView addGestureRecognizer:singleTap];
[singleTap release];
-(void)tapDetected{
NSLog(#"single Tap on imageview");
}
According to your comment, if you want to know about image's index then you can do this by tag property of image view. Assign your image view's tag property as per your need and get the tag on Touch event.
For example :
Add UITapGestureRecognizer
ITapGestureRecognizer* tap = [[UITapGestureRecognizer alloc] initWithTarget:self
action:#selector(tap:)];
tap.numberOfTapsRequired = 1;
[self addGestureRecognizer:tap];
[tap release];
Use its delegate method : - (void) touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event
// called when touch is began or when user touches
- (void) touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event
{
UITouch *touch = [touches anyObject];
int indexOfImageView = touch.view.tag;
}
Hope it helps you...
I want to add to my UIViewController :
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapGesture:)];
tapGesture.numberOfTapsRequired = 2;
[self.view addGestureRecognizer:tapGesture];
[tapGesture release];
UITapGestureRecognizer *tapGesture2 = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapGesture2:)];
tapGesture2.numberOfTapsRequired = 1;
[self.view addGestureRecognizer:tapGesture2];
[tapGesture2 release];
the problem is if the user tap twice the two methods are called,and i want that if the user make double tap only the first(handleTapGesture) will be called and if he make one tap it will call only the second one(handleTapGesture2)
use this one..
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapGesture)];
tapGesture.numberOfTapsRequired = 2;
[self.view addGestureRecognizer:tapGesture];
[tapGesture release];
UITapGestureRecognizer *tapGesture2 = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapGesture2)];
tapGesture2.numberOfTapsRequired = 1;
[tapGesture2 requireGestureRecognizerToFail: tapGesture];
[self.view addGestureRecognizer:tapGesture2];
[tapGesture2 release];
you can use the code i posted on here
in this the method requireGestureRecognizerToFail: is used in viewcontroller.m this will solve your problem