Zooming a hotspot when it clicked

I have to make some hot spots on my image , so that when i click anyone of them they zoom.

For example consider the image

When i click that butterfly then it zoom

Please provide a good solution

Following are my thinking

• Use a button and click it and add a subImageView and zoom it.
• Zoom a particular region of this image when touch at that place.

Both ideas have their limitations.In first i have to create a saperate image and also my app size will become very large. and limitation of second is that it will not zoom exact required image.

I wa开发者_JAVA百科s also thinking of masking but i think that is also not very good way, because this is just a sample, i have many images like this and can be many hot spots on a single image.

please guide.

If you are dealing we rather large images you should check out CATiledLayer, which are very fast and efficient to use.

Check out this blog post, including the demo app: http://www.cimgf.com/2011/03/01/subduing-catiledlayer/