// Here self.webView is the view whose screenshot I need to take
// The screenshot is saved in jpg format in the application directory to avoid any loss of quality in retina display devices i.e. all current devices running iOS 10
UIGraphicsBeginImageContextWithOptions(self.webView.bounds.size, NO, [UIScreen mainScreen].scale);
[self.webView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSString *jpgPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Test.jpg"];
[UIImageJPEGRepresentation(image, 1.0) writeToFile:jpgPath atomically:YES];
UIImage *pop=[[UIImage alloc]initWithContentsOfFile:jpgPath];
// pop is the final image in jpg format and high quality with the exact resolution of the view you selected in pixels and not just points
Found a mistake? Have a question or improvement idea?
Let me know.