How to convert a NSData to pdf in iPhone sdk? - iphone

Question

Am converting a webpage as a pdf file. I did the following,
NSString *string=[NSString stringWithFormat:#"%#.pdf",[chapersArray objectAtIndex:pageIndex]];
[controller1 addAttachmentData:pdfData mimeType:#"application/pdf" fileName:string];
[self presentModalViewController:controller1 animated:YES];
[controller1 release];
Now how can i convert my NSData into pdf and save in my application memory? Kindly help me with sample codes or suggestions. Thanks all.

Answer 1

Am assuming you have your pdf in documents directory here. You can change it to where ever it actually is. Try this -
//to convert pdf to NSData
NSString *pdfPath = [documentsDirectory stringByAppendingPathComponent:#"test.pdf"];
NSData *myData = [NSData dataWithContentsOfFile:pdfPath];
Essentially using CGPDFDocumentCreateWithProvider you can convert NSData to pdf,
//to convert NSData to pdf
NSData *data = //some nsdata
CFDataRef myPDFData = (CFDataRef)data;
CGDataProviderRef provider = CGDataProviderCreateWithCFData(myPDFData);
CGPDFDocumentRef pdf = CGPDFDocumentCreateWithProvider(provider);
Don't forget to CFRelease all unused data after you are done.

Answer 2

I got this is in a simple method as follows,
-(IBAction)saveasPDF:(id)sender{
NSString *string=[NSString stringWithFormat:#"%#.pdf",[chapersArray objectAtIndex:pageIndex]];
[controller1 addAttachmentData:pdfData mimeType:#"application/pdf" fileName:string];
[self presentModalViewController:controller1 animated:YES];
[pdfData writeToFile:[self getDBPathPDf:string] atomically:YES];
}
-(NSString *) getDBPathPDf:(NSString *)PdfName {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
return [documentsDir stringByAppendingPathComponent:PdfName];
}

Answer 3

You can try with this solution:
- (void)saveDataToPDF:(NSData *)pdfDocumentData
{
//Create the pdf document reference
CGDataProviderRef dataProvider = CGDataProviderCreateWithCFData((CFDataRef)pdfDocumentData);
CGPDFDocumentRef document = CGPDFDocumentCreateWithProvider(dataProvider);
//Create the pdf context
CGPDFPageRef page = CGPDFDocumentGetPage(document, 1); //Pages are numbered starting at 1
CGRect pageRect = CGPDFPageGetBoxRect(page, kCGPDFMediaBox);
CFMutableDataRef mutableData = CFDataCreateMutable(NULL, 0);
//NSLog(#"w:%2.2f, h:%2.2f",pageRect.size.width, pageRect.size.height);
CGDataConsumerRef dataConsumer = CGDataConsumerCreateWithCFData(mutableData);
CGContextRef pdfContext = CGPDFContextCreate(dataConsumer, &pageRect, NULL);
if (CGPDFDocumentGetNumberOfPages(document) > 0)
{
//Draw the page onto the new context
//page = CGPDFDocumentGetPage(document, 1); //Pages are numbered starting at 1
CGPDFContextBeginPage(pdfContext, NULL);
CGContextDrawPDFPage(pdfContext, page);
CGPDFContextEndPage(pdfContext);
}
else
{
NSLog(#"Failed to create the document");
}
CGContextRelease(pdfContext); //Release before writing data to disk.
//Write to disk
[(__bridge NSData *)mutableData writeToFile:#"/Users/David/Desktop/test.pdf" atomically:YES];
//Clean up
CGDataProviderRelease(dataProvider); //Release the data provider
CGDataConsumerRelease(dataConsumer);
CGPDFDocumentRelease(document);
CFRelease(mutableData);
}