ios - UIView screenshot with magnificationFilter -

ios - UIView screenshot with magnificationFilter -

i have tiny qrcode uiimage set big uiimageview. in order avoid gradient black white when amplifying, setted uiimageview magnification filter kcafilternearest shown below (it works):

[qrcodeimageview layer].magnificationfilter = kcafilternearest;

now need take screenshot imageview, result image ignoring magnification filter:

here screenshot code:

uigraphicsbeginimagecontextwithoptions(cgsizemake(qrcodeimageview.frame.size.width, qrcodeimageview.frame.size.height),yes, 2.0f); cgcontextref context = uigraphicsgetcurrentcontext(); [qrcodeimageview.layer renderincontext:context]; uiimage *capturedimage = uigraphicsgetimagefromcurrentimagecontext(); uigraphicsendimagecontext();

so, question is, how render in context given magnification filter?

thanks in advance

ios