how to save pdf from uiwebview in objective c

Question

i want to save pdf to ibook from UIWebView in the app, the html in UIWebView can be multi page.
i try using

NSString *page = [self.lowWebview stringByEvaluatingJavaScriptFromString:@"document.body.outerHTML"];
NSString *path = [self exportHTMLContentToPDF:page];

NSURL *targetURL = [NSURL fileURLWithPath:path];

self.docController = [UIDocumentInteractionController interactionControllerWithURL:targetURL];

if([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"itms-books:"]])
{
    [self.docController presentOpenInMenuFromRect:CGRectZero inView:self.view animated:YES];
    NSLog(@"iBooks installed");

} else {

    NSLog(@"iBooks not installed");

}

exportHTMLContentToPDF:

CustomPrintPageRenderer *printPageRenderer = [[CustomPrintPageRenderer alloc] init];

UIMarkupTextPrintFormatter *printFormatter = [[UIMarkupTextPrintFormatter alloc] initWithMarkupText:HTMLContent];

[printPageRenderer addPrintFormatter:printFormatter startingAtPageAtIndex:0];//.addPrintFormatter(printFormatter, startingAtPageAtIndex: 0)

NSData *pdfData = [self drawPDFUsingPrintPageRenderer:printPageRenderer];

NSString *docDirPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *fileName = [docDirPath stringByAppendingPathComponent:@"ticket.pdf"];

[pdfData writeToFile:fileName atomically:true];//.writeToFile(fileName, atomically: true)

NSLog(@"%@", fileName);
return fileName;

the problem is exportHTMLContentToPDF create just one page if UIWebView contain multiple page, and some time the output format is not well print in pdf

thanks in advance.

score 1 · Answer 1 · edited Oct 06 '17 at 21:08

Create PDF from any Microsoft Document loaded in UIWebview

#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 = [render printToPDF];

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

    if (pdfData) {
        [pdfData writeToFile:directoryPath atomically: YES];
    }
    else
    {
        NSLog(@"PDF couldnot be created");
    }
});}

Excerpted from PDF Creation in iOS - Create PDF from any Microsoft Document loaded in UIWebview. The original author was Mansi Panchal. Attribution details can be found on the contributor page. The source is licenced under CC BY-SA 3.0 and may be found in the Documentation archive. Reference topic ID: 2416 and example ID: 28437.

the app hang in this line "[self prepareForDrawingPages: NSMakeRange(0, self.numberOfPages)];" and no error or crash show in xcode, just hanging — Saeed-rz, Apr 17 '17 at 07:25

score 1 · Answer 2 · answered Aug 24 '19 at 22:27

#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 = [render printToPDF];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
if (pdfData) {
        [pdfData writeToFile:directoryPath atomically: YES];
}
else
{
        NSLog(@"PDF couldnot be created");
} });}

Ref: https://medium.com/@javedmultani16/create-pdf-from-any-microsoft-document-loaded-in-uiwebview-in-ios-15229671060b

score 0 · Answer 3 · answered Oct 08 '17 at 08:55

0

This may help with quality and multi-page issues : https://coderwall.com/p/gssuka/rendering-html-pdf-report-for-printing-from-uiwebview

answered Oct 08 '17 at 08:55

jki

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how to save pdf from uiwebview in objective c

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