UIScrollview zoom and enable paging simultaneously

问题

Can i implement both the paging and zooming of imageview in a uiscrollview at the same time.

回答1:

Yes. You can do it. In each page of the mainScrollView add a subScrollView containing the imageView. You need to do the following things.

1. Set maximumZoomScale for subScrollView

   [subScrollView setMaximumZoomScale:2.0f];   // You can set any value
   

   This value is calculated based on the size of the image displayed in the imageView.

2. In the viewForZoomingInScrollView: method of the subScrollView return the imageView

   - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
   
       return imageView;
   }   
   

3. Enable paging in mainScrollView

   mainScrollView.pagingEnabled = YES;
   

   You have to write further code to handle paging in the mainScrollView.

来源：https://stackoverflow.com/questions/6260399/uiscrollview-zoom-and-enable-paging-simultaneously