Zoom Image and store the visible Image

I am working on module where I need to perform following activities.

1. Select image from Library.
2. 开发者_如何学编程Show that image.
3. Zoom that image.
4. Save the Zoomed portion or visible portion on the view.so that final image will get saved with zoomed.

I have covered 1,2,3 and struggling with 4

Does anyone have idea about this?

Thanks,

Sagar

If I understand you correctly, you want to save image that appears on the screen after zooming? To do that you can use CGImageCreateWithImageInRect function.