How can I zoom an image in my iPhone application?

I had an image in image in my iPhone application. The text in the image is not readable as开发者_开发知识库 it is very small. How can I zoom it at run time?

Anyone please help..

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imageview.frame = CGRectMake(imageview.frame.origin.x, (imageview.frame.origin.y), imageview.frame.size.width + 20, imageview.frame.size.height + 20);

OR

imageview.transform = CGAffineTransformMakeScale(1.05, 1.05);

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You can place the image on a ImageView , which is added to the ScrollView. And then you can use the scroll view delegate method

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView

for zooming and scrolling.