Screenshot of iOS screen

#import "ViewController.h" @interface Viewcontroller () @end @implementation viewcontroller-(void) viewdidload {    [ Super Viewdidload];    Additional setup after loading the view, typically from a nib.    Turn on bitmap context    uigraphicsbeginimagecontextwithoptions (self.view.bounds.size, NO, 0);    Gets the context    cgcontextref CTX = Uigraphicsgetcurrentcontext ();    Render the layer on the control to the context (the layer can only render cannot be drawn)    [Self.view.layer renderincontext:ctx];    Production of a picture    UIImage *image = Uigraphicsgetimagefromcurrentimagecontext ();    Close context    uigraphicsendimagecontext ();    Convert the image into binary png    nsdata *imagedata = uiimagepngrepresentation (image);    Write to Desktop    [imageData writetofile:@ "/users/zhaotian/desktop/view.png" Atomically:yes];  } -(void) didreceivememorywarning {    [super didreceivememorywarning];    Dispose of any resources the can be recreated.} @end

　　

Screenshot of iOS screen