how to save pdf from uiwebview in objective c

#define kPaperSizeA4 CGSizeMake(595.2,841.8)

First of all implement UIPrintPageRenderer protocol

@interface UIPrintPageRenderer (PDF)
- (NSData*) printToPDF;
@end
@implementation UIPrintPageRenderer (PDF)
- (NSData*) printToPDF
{
NSMutableData *pdfData = [NSMutableData data];
    UIGraphicsBeginPDFContextToData( pdfData, self.paperRect, nil );
    [self prepareForDrawingPages: NSMakeRange(0, self.numberOfPages)];
    CGRect bounds = UIGraphicsGetPDFContextBounds();
    for ( int i = 0 ; i < self.numberOfPages ; i++ )
    {
UIGraphicsBeginPDFPage();
[self drawPageAtIndex: i inRect: bounds];
    }
UIGraphicsEndPDFContext();
return pdfData;
}
@end

Then, call below method after document finished loading in UIWebView

-(void)createPDF:(UIWebView *)webView {
UIPrintPageRenderer *render = [[UIPrintPageRenderer alloc] init];
[render addPrintFormatter:webView.viewPrintFormatter startingAtPageAtIndex:0];
float padding = 10.0f;
CGRect paperRect = CGRectMake(0, 0, kPaperSizeA4.width, kPaperSizeA4.height);
CGRect printableRect = CGRectMake(padding, padding, kPaperSizeA4.width-(padding * 2), kPaperSizeA4.height-(padding * 2));
[render setValue:[NSValue valueWithCGRect:paperRect] forKey:@"paperRect"];
 [render setValue:[NSValue valueWithCGRect:printableRect] forKey:@"printableRect"];
NSData *pdfData =…