问题
I would like to annotate PDFs within an iOS application. I came across the PoDoFo library, but I'm not sure how to use this in an iOS application.
Is it possible to use this library to annotate PDFs on iOS? If so, how?
回答1:
Please do something like this.
+ (void)createUTFAnnotationTextOnPage:(NSInteger)pageIndex
doc:(PdfDocument*)doc // PdfMemDocument instance
rect:(PdfRect)rect
title:(NSString*)title
content:(NSString*)content
bOpen:(Boolean)bOpen
colorR:(double)r
colorG:(double)g
colorB:(double)b {
PdfPage* pPage = doc->GetPage(pageIndex);
if (! pPage) {
// couldn't get that page
return;
}
PdfAnnotation* anno;
anno = pPage->CreateAnnotation(ePdfAnnotation_Text, rect);
PdfString sTitle(reinterpret_cast<const pdf_utf8*>([title UTF8String]));
PdfString sContent(reinterpret_cast<const pdf_utf8*>([content UTF8String]));
anno->SetTitle(sTitle);
anno->SetContents(sContent);
anno->SetColor(r, g, b);
anno->SetOpen(bOpen);
}
// -----------
PdfError::EnableDebug(false); // or true
NSString* inFile = [[NSBundle mainBundle] pathForResource:@"forTesting.pdf" ofType:nil];
PoDoFo::PdfMemDocument doc( [inFile UTF8String] );
[YourPodofoObj createUTFAnnotationTextOnPage:0 doc:&doc rect:PdfRect(50, 50, 50, 50) title:@"author by XX" content:@"I use it for test" bOpen:true colorR:1.0 colorG:.0 colorB:.0];
doc.Write(OUT_PUT_PATH);
回答2:
The Above answer only provides you way to add Annotations (of Type FreeText etc). Generally you would want to create/Modify Fields. I normally use PdfTextFields, PdfCheckboxes, PdfSignature Field for this purpose. Hope that helps
PdfMemDocument memDoc;
PdfFileInputStream fileInputStream(filePath);
char *srcBuffer = new char[fileInputStream.GetFileLength()];
size_t srcLen = fileInputStream.GetFileLength();
fileInputStream.Read(srcBuffer,srcLen);
PdfOutputDevice outputDevice(filePath);
outputDevice.Write(srcBuffer,srcLen);
memDoc.Load(srcBuffer,srcLen);
PdfTextField txtField = PdfTextField( pPage,PdfRect(50, 50, 50, 50),&memDoc);
txtField.SetFieldName(@"SomeUniqueName");
memDoc.Write(&outputDevice);
outputDevice.Flush();
来源:https://stackoverflow.com/questions/7643771/how-can-i-use-the-podofo-library-for-annotating-pdfs-on-ios