How to generate pdf using NSData or using data bytes objective c? - iphone

Question

Hi I want to write pdf using NSData or using data bytes given by webservice ?
-(NSData *)saveData:(NSData*)fileData fileName:(NSString *)fileName fileType:(NSString *)fileType
{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
NSString *filePath = [NSString stringWithFormat:#"%#/%#.%#",documentsDir,fileName,fileType];
NSData* downloadData = [NSData dataWithData:fileData];
[fileManager createFileAtPath:filePath contents:downloadData attributes:nil];
}
I am using this but it's not working it's give me error "It may be damaged or use a file format that Preview doesn’t recognize." on opening that pdf created by above code.

Answer 1

you can convert NSData to PDF with bellow code... I get the bellow Code From This link
NSString *string=[NSString stringWithFormat:#"%#.pdf",[yourArray objectAtIndex:pageIndex]];
[controller1 addAttachmentData:pdfData mimeType:#"application/pdf" fileName:string];
[self presentModalViewController:controller1 animated:YES];
[controller1 release];
//to convert pdf to NSData
NSString *pdfPath = [documentsDirectory stringByAppendingPathComponent:#"test.pdf"];
NSData *myData = [NSData dataWithContentsOfFile:pdfPath];
//to convert NSData to pdf
NSData *data = //some nsdata
CFDataRef myPDFData = (CFDataRef)data;
CGDataProviderRef provider = CGDataProviderCreateWithCFData(myPDFData);
CGPDFDocumentRef pdf = CGPDFDocumentCreateWithProvider(provider);
-(IBAction)saveasPDF:(id)sender{
NSString *string=[NSString stringWithFormat:#"%#.pdf",[yourArray 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];
}
Summary:
get NSData from pdf file path
NSData *pdfData = [NSData dataWithContentsOfFile:pathToFile1];
NSLog(#"pdfData= %d", pdfData != nil);
write NSData to pdf file
[pdfData writeToFile:pathToFile2 atomically:YES];

Answer 2

#ChallengerGuy (If you are still looking for the Swift 2 approach for the CGPDFDocument)
//to convert data of type NSData
guard let cfData = CFDataCreate(kCFAllocatorDefault, UnsafePointer<UInt8>(data.bytes), data.length) else { return nil}
let cgDataProvider = CGDataProviderCreateWithCFData(cfData)
guard let cgPDFDocument = CGPDFDocumentCreateWithProvider(cgDataProvider) else { return nil }
Hope the above helps