The requirement is to split the PDF in to individual page, retaining the individual file as .pdf extension only.
The files which are created in /CreatedPDF Folder are not getting opened 
请帮助解决/纠正此问题。
//"fileURL" is the original File which has to be broken
//"pages" is the number of pages in PDF
NSInteger pages = CGPDFDocumentGetNumberOfPages(pdfDocReference);
for (int page = 1; page <= pages; page++)
{
NSFileManager *fm = [NSFileManager defaultManager];
NSString *dirName = [documentsDirectory stringByAppendingPathComponent:@"/CreatedPDF"];
[fm createDirectoryAtPath:dirName withIntermediateDirectories:YES attributes:nil error:nil];
NSString *pdfPath = [dirName stringByAppendingPathComponent:[NSString stringWithFormat:@"page_%d.pdf",page]];
NSURL *pdfUrl = [NSURL fileURLWithPath:pdfPath];
CGContextRef context = CGPDFContextCreateWithURL((__bridge_retained CFURLRef)pdfUrl, NULL, NULL);
CGPDFDocumentRef pdfDoc = CGPDFDocumentCreateWithURL((__bridge_retained CFURLRef)fileURL);
CGPDFPageRef pdfPage = CGPDFDocumentGetPage(pdfDoc, 1);
CGRect pdfCropBoxRect = CGPDFPageGetBoxRect(pdfPage, kCGPDFMediaBox);
// Copy the page to the new document
CGContextBeginPage(context, &pdfCropBoxRect);
CGContextDrawPDFPage(context, pdfPage);
// Close the source files
CGContextEndPage(context);
CGPDFDocumentRelease(pdfDoc);
}
我错过了一行代码，因为我们还必须释放 CGContext，所以在循环中只需添加这一行，其余所有代码都将起作用。
CGContextRelease (context);