ios - Capture UIImage from UIView not working -

im trying capture uiimage uiview using imagecontext

func captureimage() -> uiimage {     uigraphicsbeginimagecontextwithoptions(self.bounds.size, true, 0.0)     self.drawviewhierarchyinrect(self.bounds, afterscreenupdates: false)     let img = uigraphicsgetimagefromcurrentimagecontext()     uigraphicsendimagecontext()     return img } 

i have tried using renderincontext()

i have in extension of uiview

i use image mapboxview subclass uiview

if let viewimage = self.mapview?.resizablesnapshotviewfromrect(frame, afterscreenupdates: false, withcapinsets: uiedgeinsetszero) {     let img = viewimage.captureimage()      self.view.addsubview(uiimageview(image: img)) } 

the img getting returned captureimage() function black...

viewimage has right contents when add view instead, there wrong capture method.

resizablesnapshotviewfromrect return uiview object, don't add object view hierarchy, , don't display view. in case self.drawviewhierarchyinrect draw nothing.

why don't capture uiimage directly mapview?

if let img = self.mapview?.captureimage() {     self.view.addsubview(uiimageview(image: img)) }