uipangesturerecognizer

问题 I'm using UIPanGestureRecognizer on a project, and I want to take the starting point and the end point. I tried to do for touchesBegin , but did not get a code that does what I need. How can I get the start point and end point of the UIPanGestureRecognizer ? 回答1: For your case, you might want to include the code inside my function into your IBAction for the panGesture. Here I've created a view, but otherwise you would just be referring to self.view instead of view . var view = UIView() func

问题 I use on the my UIImageVIew the -(IBAction)handlePanFrom:(UIPanGestureRecognizer *)recognizer and in the my code I try to use a two state: if([recognizer state] == UIGestureRecognizerStateBegan) { NSLog(@"Began"); } if([recognizer state] == UIGestureRecognizerStateEnded) { NSLog(@"End"); } in the console I see a "Began" message every time when I start move the UIImageView, but no any "End" message... What I do wrong? 回答1: from apple doc: UIGestureRecognizerStateEnded: The gesture recognizer

问题 I am trying to using UIPanGestureRecognizer and UITapGestureRecognizer on UISlider. tap is working fine i am facing problem with UIPanGestureRecognizer . I need to call handleTransactionPan method on changing value of UISlider but it is never being called because of its delegate method. How can i invoke the selector while keeping the delegate methods to fire? Here is the code for what i have done so far. - (void)viewDidLoad { [super viewDidLoad]; pr=[[UIPanGestureRecognizer alloc]

问题 I'm trying to implement a paging interaction for one of my views. I thought I would just use UISwipeGestureRecognizers . But through trial and error as well as examination of the documentation it appears that A swipe is a discrete gesture, and thus the associated action message is sent only once per gesture. So while I could trigger the page, I wouldn't be able to hook up animation that occurred during the drag. Is my only alternative to use a UIPanGestureRecognizer and reimplement the basic

问题 I have a UIView (the red one in the image) I can pan in the x-axis. I can return the view back to the original position but I want to return to that position as though it's being pulled by a light spring, or sort of easing back to the original position with some sort of deceleration. At the moment it weirdly jumps back to that position. This is my relevant code and an image is attached to show the view in it's maximum position. @IBAction func handlePan(recognizer:UIPanGestureRecognizer) { if

问题 I am trying to determine number of finger touches on UITableView when - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView is called & perform some task accordingly. Two approaches that I have tried so far are: Subclassing UITableView to override touchesBegan:withEvent: - The problem with this approach is that this method is only fired when there is 'some' tap on the screen, not when the user just quickly scrolls without resting the finger. Using uipangesturerecognizer to detect number

问题 i use UIPanGestureRecognizer to move an object along the path drawn by the user. But this object is animating and i need to interact with it during animation. Is it possible? I already try to use UIViewAnimationOptionAllowUserInteraction but no results. 回答1: Yes it is possible. But I would use CABasicAnimation for animating the object and not the UIView animationWith... and then add the UIPanGestureRecognizer to the object. So some example code: // Configure the animation and add it to the

问题 as shown in the picture below the UIPanGestureRecognizer will not pan when the drag started inside the "dead zone" on the top of the screen. This is most likely caused by the notification center. The touchesMoved:withEvent: method however does get called, so there should be a way to get pan gestures recognized in this area. Has anyone else came across this issue, are there any workarounds out there yet? Thanks for any help! 回答1: It is possible that on the top edge of the screen you have

问题 I am using the locationInView to set the position of my bouton when the user release it. After release, I give the location stored before but in fact, my button is not going back to the correct position. This my code: - (IBAction)handlePan:(UIPanGestureRecognizer *)recognizer{ CGPoint translation = [recognizer translationInView:self.view]; recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x, recognizer.view.center.y + translation.y); [recognizer setTranslation

问题 using UIPanGestureRecognizer we are moving the cells in the UICollectionView When we started dragging UIGestureRecognizerStateBegan is called. but when we still holds the dragging cell and presses the Home Button in ipad, the UIPanGestureRecognizer not calling UIGestureRecognizerStateEnded or UIGestureRecognizerStateFailed or UIGestureRecognizerStateCancelled , not even calling gesture method - (void)handlePanGesture:(UIPanGestureRecognizer *)gestureRecognizer; When i opened my app from