CODEWITHSUNDEEP
iosobjective-canimationuipageviewcontroller
SteBra
SteBra

Reputation: 4247

How to synchronise UIView moving with swipe gesture of UIPageViewController

Ok, here is the thing:

I need to have few animations happening on every screen change in my PageViewController.

So, when a user swipes, an image should fly in from the top left corner, from example.

I can make that animation to happen over time when user swipes and changes the page, but what I need is to that animation to be synchronised with the swipe movement itself. So if a user presses the screen and starts swiping, the animation should follow user's finger and animate it's translation with the finger movement.

How can I achieve that? I guess I need some sort of swipe gesture listener, but I failed to find any solution online. I guess I'm not using the right keywords.

Upvotes: 1

Views: 842

Answers (1)

Oren
Oren

Reputation: 5103

You can use a UIPanGestureRecognizer to get the number of pixels swiped:

UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panRecognizer_Panned:)];
[self.myViewToSwipe addGestureRecognizer:panRecognizer];

...

- (void) panRecognizer_Panned:(UIPanGestureRecognizer *)recognizer {
    CGFloat pixelsMovedHoriz = [recognizer translationInView:self.vwRelativeTo].x;
}

Upvotes: 2

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