View Controller Transitions - Extra Credit

Hello Tyler,

check out the wwdc 14 on custom transitions, i checked it out and they should answer your question, and if not you can probably google it.

Best, Kai.

I sort of managed to do this by setting the initial frame.origin.x to -320 and then setting the detail.view.frame to containerView.bounds in the completed transition.

CGRect frame = containerView.bounds;
    frame.origin.x -= 320.0;

    detail.view.frame = frame;
    [containerView addSubview:detail.view];

    [UIView animateWithDuration:1.0 animations:^{
        detail.view.frame = containerView.bounds;
    } completion:^(BOOL finished) {
        [transitionContext completeTransition:YES];
    }];

However it's not perfect as the background slides in as expected, but then the image pops in once it's loaded at full size. If you dismiss the animation and then open the image again it works perfectly as the image has already loaded, but I'd appreciate feedback as to how to get it looking good first time.

One solution could be to load all of the grid images as standard_resolution rather than thumbnails, but this is almost certainly not the right way to do this...