Combine longpress gesture and drag gesture together Combine longpress gesture and drag gesture together objective-c objective-c

Combine longpress gesture and drag gesture together


UILongPressGestureRecognizer already does what you want for you. Take a look at the UIGestureRecognizerState property. From the documentation:

Long-press gestures are continuous. The gesture begins (UIGestureRecognizerStateBegan) when the number of allowable fingers (numberOfTouchesRequired) have been pressed for the specified period (minimumPressDuration) and the touches do not move beyond the allowable range of movement (allowableMovement). The gesture recognizer transitions to the Change state whenever a finger moves, and it ends (UIGestureRecognizerStateEnded) when any of the fingers are lifted.

So essentially after your UILongPressGestureRecognizerselector is called you listen to UIGestureRecognizerStateBegan, UIGestureRecognizerStateChanged, UIGestureRecognizerStateEnded. Keep changing your views frame during UIGestureRecognizerStateChanged.

- (void)moveRight:(UILongPressGestureRecognizer *)gesture{    if(gesture.state == UIGestureRecognizerStateBegan)    {        //if needed do some initial setup or init of views here    }    else if(gesture.state == UIGestureRecognizerStateChanged)    {        //move your views here.        [yourView setFrame:];    }    else if(gesture.state == UIGestureRecognizerStateEnded)    {        //else do cleanup    }}


@implementation MyViewController {    CGPoint _priorPoint;}- (void)moveRight:(UILongPressGestureRecognizer *)sender {    UIView *view = sender.view;    CGPoint point = [sender locationInView:view.superview];    if (sender.state == UIGestureRecognizerStateChanged) {        CGPoint center = view.center;        center.x += point.x - _priorPoint.x;        center.y += point.y - _priorPoint.y;        view.center = center;    }    _priorPoint = point;}


In Swift this can be achieved using below code

class DragView: UIView {   // Starting center position  var initialCenter: CGPoint?  override func didMoveToWindow() {    super.didMoveToWindow()    // Add longPress gesture recognizer    let longPress = UILongPressGestureRecognizer(target: self, action: #selector(longPressAction(gesture:)))    addGestureRecognizer(longPress)  }  // Handle longPress action  func longPressAction(gesture: UILongPressGestureRecognizer) {    if gesture.state == .began {        guard let view = gesture.view else {            return        }        initialCenter = gesture.location(in: view.superview)    }    else if gesture.state == .changed {        guard let originalCenter = initialCenter else {            return        }        guard let view = gesture.view else {            return        }        let point = gesture.location(in: view.superview)        // Calculate new center position        var newCenter = view.center;        newCenter.x += point.x - originalCenter.x;        newCenter.y += point.y - originalCenter.y;        // Update view center        view.center = newCenter    }    else if gesture.state == .ended {       ...    }}