ios - Efficiently take a snapshot of a large UIWebView? -

i've tried following code take screenshot of uiwebview bounds larger of screen (for example, around 1200pts), screenshot comes out top part of web view, stretched vertically downwards cover whole rect it's supposed draw. ideas? using -renderincontext:, that's slower , outdated method. here's current code:

uigraphicsbeginimagecontextwithoptions(view.bounds.size, view.opaque, scale);     [view drawviewhierarchyinrect:view.bounds afterscreenupdates:yes];     uiimage *img = uigraphicsgetimagefromcurrentimagecontext();     uigraphicsendimagecontext();     return img;