Question

I have a UIImageView as one of my tabbarcontroller views, and I’ve added a UISwipeGestureRecognizer (right and left) to navigate through a series of photos in an NSArray.

However, when swiping it jumps from photo to photo with no smooth transition. I’m not after anything fancy, but even a slide animation would be okay, like as one photo slides in, the other is sliding out the other side. Is this possible with the UISwipeGestureRecgonizer and an NSArray?

Answer 1

The standard solution is to use a UIScrollView with pagingEnabled = YES and multiple image views inside the scroll view. If you want to work with just one UIImageView, add a transition animation to the image view’s layer when you recognize a swipe:

CATransition *animation = [CATransition animation];
animation.duration = 0.5;
animation.type = kCATransitionMoveIn;
animation.subtype = kCATransitionFromRight;
[myImageView.layer addAnimation:animation forKey:@"imageTransition"];
myImageView.image = newImage;