Question

Is swapping 2 images a standard solution? Is there a better way?

Specifically imagine an image on screen, which (upon tap) should increases in size 30%.

Please provide an example.

Answer 1

apply a basic view animation to your imageview.

    [UIView animateWithDuration:0.3
                 animations:^{
                     yourImageView.transform = CGAffineTransformMakeScale(1.3, 1.3);
                 }
    ];