How to Get Uitouch Location from Uigesturerecognizer

How to get UITouch location from UIGestureRecognizer

You can use the locationInView: method on UIGestureRecognizer. If you pass nil for the view, this method will return the location of the touch in the window.

- (void)handleTap:(UITapGestureRecognizer *)tapRecognizer
{
    CGPoint touchPoint = [tapRecognizer locationInView: _tileMap]
}

There is also a helpful delegate method gestureRecognizer:shouldReceiveTouch:. Just make sure to implement and set your tap gesture's delegate to self.

Keep a reference to the gesture recognizer.

@property UITapGestureRecognizer *theTapRecognizer;

Initiailze the gesture recognizer

_theTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(someMethod:)];
_theTapRecognizer.delegate = self;
[someView addGestureRecognizer: _theTapRecognizer];

Listen for delegate methods.

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
    CGPoint touchLocation = [_tileMap convertTouchToNodeSpace: touch];
    // use your CGPoint
    return YES;
}

Getting the UITouch objects for a UIGestureRecognizer

Jay's right... you'll want a subclass. Try this one for size, it's from one of my projects. In DragGestureRecognizer.h:

@interface DragGestureRecognizer : UILongPressGestureRecognizer {

}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;

@end

@protocol DragGestureRecognizerDelegate <UIGestureRecognizerDelegate>
- (void) gestureRecognizer:(UIGestureRecognizer *)gr movedWithTouches:(NSSet*)touches andEvent:(UIEvent *)event;
@end

And in DragGestureRecognizer.m:

#import "DragGestureRecognizer.h"

@implementation DragGestureRecognizer

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {

    [super touchesMoved:touches withEvent:event];

    if ([self.delegate respondsToSelector:@selector(gestureRecognizer:movedWithTouches:andEvent:)]) {
        [(id)self.delegate gestureRecognizer:self movedWithTouches:touches andEvent:event];
    }

}

@end 

Of course, you'll need to implement the

- (void) gestureRecognizer:(UIGestureRecognizer *)gr movedWithTouches:(NSSet*)touches andEvent:(UIEvent *)event; 

method in your delegate -- for example:

DragGestureRecognizer * gr = [[DragGestureRecognizer alloc] initWithTarget:self action:@selector(pressed:)];
gr.minimumPressDuration = 0.15;
gr.delegate = self;
[self.view addGestureRecognizer:gr];
[gr release];

- (void) gestureRecognizer:(UIGestureRecognizer *)gr movedWithTouches:(NSSet*)touches andEvent:(UIEvent *)event{

    UITouch * touch = [touches anyObject];
    self.mTouchPoint = [touch locationInView:self.view];
    self.mFingerCount = [touches count];

}

Get original touch location from UIPanGestureRecognizer

You should be able to set the delegate for the gesture recogniser and implement

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch

to get the initial touch.

Get Window Coordinates of Touch in Gesture Recognizer in Swift?

Try this:

var touchLocation = recognizer.locationInView(recognizer.view.window)
self.panForTranslation(touchLocation)

How do I get the coordinates for finger tapping in UIView?

There’re two ways to accomplish this. If you’ve already got a subclass of UIView that you’re using, you can just override the -touchesEnded:withEvent: method on that subclass, like this:

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *aTouch = [touches anyObject];
    CGPoint point = [aTouch locationInView:self];
    // point.x and point.y have the coordinates of the touch
}

If you’re not already subclassing UIView, though, and the view is owned by a view controller or whatever, then you can use a UITapGestureRecognizer, like this:

// when the view's initially set up (in viewDidLoad, for example)
UITapGestureRecognizer *rec = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapRecognized:)];
[someView addGestureRecognizer:rec];
[rec release];

// elsewhere
- (void)tapRecognized:(UITapGestureRecognizer *)recognizer
{
    if(recognizer.state == UIGestureRecognizerStateRecognized)
    {
        CGPoint point = [recognizer locationInView:recognizer.view];
        // again, point.x and point.y have the coordinates
    }
}

How to get a CGPoint from a tapped location?

you have two way ...

1.

-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{
  UITouch *touch = [[event allTouches] anyObject];
  CGPoint location = [touch locationInView:touch.view];
}

here,you can get location with point from current view...

2.

UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapped:)];
[tapRecognizer setNumberOfTapsRequired:1];
[tapRecognizer setDelegate:self];
[self.view addGestureRecognizer:tapRecognizer];

here,this code use when you want to do somthing with your perticular object or subview of your mainview

Is it possible to get the x and y coordinates of a touch?

Using touchesBegan Event

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [[event allTouches] anyObject];
    CGPoint touchPoint = [touch locationInView:self.view];
    NSLog(@"Touch x : %f y : %f", touchPoint.x, touchPoint.y);
}

This event is triggered when touch starts.

Using Gesture

Register your UITapGestureRecognizer in viewDidLoad: Method

- (void)viewDidLoad {
    [super viewDidLoad];
    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGestureRecognizer:)];
    [self.view setUserInteractionEnabled:YES];
    [self.view addGestureRecognizer:tapGesture];
}

Setting up the tapGestureRecognizer function

// Tap GestureRecognizer function
- (void)tapGestureRecognizer:(UIGestureRecognizer *)recognizer {
    CGPoint tappedPoint = [recognizer locationInView:self.view];
    CGFloat xCoordinate = tappedPoint.x;
    CGFloat yCoordinate = tappedPoint.y;

    NSLog(@"Touch Using UITapGestureRecognizer x : %f y : %f", xCoordinate, yCoordinate);
}

Sample Project

---

Related Topics