如何在文档文件夹中保存创build的PDF并在iOS中合并
更新我能够在iPHone中创build单独的带有注释的照片的PDF页面。 点击button时，我每次都会生成一个PDF页面，而我希望那些PDF页面在单个PDF页面中。 我无法将单个PDF文件合并在一起。
http://mobile.tutsplus.com/tutorials/iphone/generating-pdf-documents/?search_index=3 我已经按照上面的url代码。 你能在这里提出一些逻辑吗？ 提前致谢。
* 在代码编辑 *你可以检查下面的代码。
- (IBAction)didClickOpenPDF { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *pdfPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.pdf",myPDFName]]; if([[NSFileManager defaultManager] fileExistsAtPath:pdfPath]) { ReaderDocument *document = [ReaderDocument withDocumentFilePath:pdfPath password:nil]; if (document != nil) { ReaderViewController *readerViewController = [[ReaderViewController alloc] initWithReaderDocument:document]; readerViewController.delegate = self; readerViewController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve; readerViewController.modalPresentationStyle = UIModalPresentationFullScreen; [self presentModalViewController:readerViewController animated:YES]; } } } - (IBAction)didClickMakePDF { [self setupPDFDocumentNamed:[NSString stringWithFormat:@"%@",myPDFName] Width:850 Height:1100]; [self beginPDFPage]; CGRect textRect = [self addText:question.text withFrame:CGRectMake(kPadding, kPadding, 400, 200) fontSize:48.0f]; // dynamic image captured by camera,comment text, lines are added here [self finishPDF]; } - (void)setupPDFDocumentNamed:(NSString*)name Width:(float)width Height:(float)height { _pageSize = CGSizeMake(width, height); NSString *myPDFName = [NSString stringWithFormat:@"%@.pdf", name]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *pdfPath = [documentsDirectory stringByAppendingPathComponent:myPDFName]; UIGraphicsBeginPDFContextToFile(pdfPath, CGRectZero, nil); int count = [gotIndexString integerValue]; for (int pageNumber = 2; pageNumber <= count; pageNumber++) { //Open a pdf page context UIGraphicsBeginPDFPageWithInfo(CGRectZero, nil); //Get graphics context to draw the page CGContextRef currentContext = UIGraphicsGetCurrentContext(); //Flip and scale context to draw the pdf correctly CGContextTranslateCTM(currentContext, 0, CGRectZero.size.height); CGContextScaleCTM(currentContext, 1.0, -1.0); NSURL *newUrl = [NSURL URLWithString:pdfPath]; NSLog(@" setupPDFDocumentNamed newUrl for loop %@ ",newUrl); //Get document access of the pdf from which you want a page CGPDFDocumentRef newDocument = CGPDFDocumentCreateWithURL ((__bridge_retained CFURLRef) newUrl); NSLog(@" setupPDFDocumentNamed newDocument for loop %@ ",newDocument); //Get the page you want CGPDFPageRef newPage = CGPDFDocumentGetPage (newDocument, 1); NSLog(@" setupPDFDocumentNamed newPage for loop %@ ",newPage); //Drawing the page CGContextDrawPDFPage (currentContext, newPage); NSLog(@"CGContextRef context %@ ",currentContext); //Clean up newPage = nil; CGPDFDocumentRelease(newDocument); newDocument = nil; newUrl = nil; } } - (void)beginPDFPage { UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, _pageSize.width, _pageSize.height), nil); } - (void)finishPDF { UIGraphicsEndPDFContext(); }
我设法通过下面的代码与一些复杂的逻辑来实现这一点:)
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; // File paths NSString *pdfPath1 = [documentsDirectory stringByAppendingPathComponent:@"temp1.pdf"]; NSString *pdfPath2 = [documentsDirectory stringByAppendingPathComponent:@"temp2.pdf"]; NSString *pdfPathOutput = [documentsDirectory stringByAppendingPathComponent:@"out.pdf"]; // File URLs - bridge casting for ARC CFURLRef pdfURL1 = (__bridge_retained CFURLRef)[[NSURL alloc] initFileURLWithPath: (NSString *)pdfPath1];//(CFURLRef) NSURL CFURLRef pdfURL2 = (__bridge_retained CFURLRef)[[NSURL alloc] initFileURLWithPath: (NSString *)pdfPath2];//(CFURLRef) CFURLRef pdfURLOutput =(__bridge_retained CFURLRef) [[NSURL alloc] initFileURLWithPath: (NSString *)pdfPathOutput];//(CFURLRef) // File references CGPDFDocumentRef pdfRef1 = CGPDFDocumentCreateWithURL((CFURLRef) pdfURL1); CGPDFDocumentRef pdfRef2 = CGPDFDocumentCreateWithURL((CFURLRef) pdfURL2); // Number of pages NSInteger numberOfPages1 = CGPDFDocumentGetNumberOfPages(pdfRef1); NSInteger numberOfPages2 = CGPDFDocumentGetNumberOfPages(pdfRef2); // Create the output context CGContextRef writeContext = CGPDFContextCreateWithURL(pdfURLOutput, NULL, NULL); // Loop variables CGPDFPageRef page; CGRect mediaBox; // Read the first PDF and generate the output pages NSLog(@"GENERATING PAGES FROM PDF 1 (%i)...", numberOfPages1); for (int i=1; i<=numberOfPages1; i++) { page = CGPDFDocumentGetPage(pdfRef1, i); mediaBox = CGPDFPageGetBoxRect(page, kCGPDFMediaBox); CGContextBeginPage(writeContext, &mediaBox); CGContextDrawPDFPage(writeContext, page); CGContextEndPage(writeContext); } // Read the second PDF and generate the output pages NSLog(@"GENERATING PAGES FROM PDF 2 (%i)...", numberOfPages2); for (int i=1; i<=numberOfPages2; i++) { page = CGPDFDocumentGetPage(pdfRef2, i); mediaBox = CGPDFPageGetBoxRect(page, kCGPDFMediaBox); CGContextBeginPage(writeContext, &mediaBox); CGContextDrawPDFPage(writeContext, page); CGContextEndPage(writeContext); } NSLog(@"DONE!"); // Finalize the output file CGPDFContextClose(writeContext); // Release from memory CFRelease(pdfURL1); CFRelease(pdfURL2); CFRelease(pdfURLOutput); CGPDFDocumentRelease(pdfRef1); CGPDFDocumentRelease(pdfRef2); CGContextRelease(writeContext);