Create PDF from UIScrollView + iphone

Question

I want to create a UIScrollView pdf file with a content size of about 320 * 2000. If I use the current context of the graphic image to capture the scroll layer, it captures only the visible part of the scroll, and not the entire layer of this scroll view.

I am using the code below:

-(void)CreatePdf:(id)sender { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *saveDirectory = [paths objectAtIndex:0]; NSString *saveFileName = @"myPDF.pdf"; [self writePDFAma]; CGRect arect=CGRectMake(0, 0, 768, 1024); CreatePDFFileAma(arect, nil); } -(void) writePDFAma { UIImage *image; NSData *data; UIAlertView *successAlert; UIAlertView *failureAlert; // NSArray *documentPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); // // This should be our documents directory NSString *saveDiirectory = [documentPath objectAtIndex:0]; // // Our PDF is named 'Example.pdf' NSString *saveFileName = @"FormImage2.JPG"; // // Create the full path using our saveDirectory and saveFileName NSString *finalPath = [saveDiirectory stringByAppendingPathComponent:saveFileName]; //NSLog(@"%@",finalPath); CGSize asize=CGSizeMake(_scrollview.frame.size.width, _scrollview.frame.size.height); //NSLog(@"%d..%d",mainViewAma.frame.size.width, mainViewAma.frame.size.height); UIGraphicsBeginImageContext(asize); [[_scrollview layer] renderInContext:UIGraphicsGetCurrentContext()]; image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); data = UIImageJPEGRepresentation(image, 1.0); BOOL catch; if(!catch){ if ([[NSFileManager defaultManager] createFileAtPath:finalPath contents:data attributes:nil]) { successAlert = [[UIAlertView alloc] initWithTitle:@"Success" message:@"Doodle was successfully saved to the Photo Library." delegate:self cancelButtonTitle:@"Close" otherButtonTitles:nil]; //[successAlert show]; [successAlert release]; } else { failureAlert = [[UIAlertView alloc] initWithTitle:@"Failure" message:@"Failed to save doodle to the Photo Library." delegate:self cancelButtonTitle:@"Close" otherButtonTitles:nil]; //[failureAlert show]; [failureAlert release]; } } } void CreatePDFFileAma (CGRect pageRect, const char *filename) { // This code block sets up our PDF Context so that we can draw to it //some code here CGContextRef pdfContext; CFURLRef url; CFMutableDictionaryRef myDictionary = NULL; NSArray *documentPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); // // This should be our documents directory NSString *saveDirectory = [documentPath objectAtIndex:0]; // // Our PDF is named 'Example.pdf' //NSString *saveFileName = @"PDFForm2.pdf"; // // Create the full path using our saveDirectory and saveFileName NSString *finalPath = [saveDirectory stringByAppendingPathComponent:saveFileName]; NSURL * aurl=[[NSURL alloc]initFileURLWithPath:finalPath]; url=(CFURLRef)aurl; // This dictionary contains extra options mostly for 'signing' the PDF myDictionary = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks); CFDictionarySetValue(myDictionary, kCGPDFContextTitle, CFSTR("AMA FORM PDF")); CFDictionarySetValue(myDictionary, kCGPDFContextCreator, CFSTR("My Name2")); // Create our PDF Context with the CFURL, the CGRect we provide, and the above defined dictionary pdfContext = CGPDFContextCreateWithURL (url, &pageRect, myDictionary); // Cleanup our mess CFRelease(myDictionary); CFRelease(url); // Starts our first page CGContextBeginPage (pdfContext, &pageRect); // Draws a black rectangle around the page inset by 50 on all sides CGContextStrokeRect(pdfContext, CGRectMake(50, 50, 768, 1024)); // This code block will create an image that we then draw to the page CGImageRef image; CGDataProviderRef provider; CFURLRef pictureURL; documentPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); // // This should be our documents directory saveDirectory = [documentPath objectAtIndex:0]; NSString *saveFileName2 = @"FormImage2.JPG"; // // Create the full path using our saveDirectory and saveFileName NSString *finalPath2 = [saveDirectory stringByAppendingPathComponent:saveFileName2]; NSURL * aurl2=[[NSURL alloc]initFileURLWithPath:finalPath2]; pictureURL=(CFURLRef)aurl2; provider = CGDataProviderCreateWithURL (pictureURL); CFRelease (pictureURL); image = CGImageCreateWithJPEGDataProvider(provider, NULL, TRUE, kCGRenderingIntentDefault); //DataProvider (, NULL, true, kCGRenderingIntentDefault); CGDataProviderRelease (provider); CGContextDrawImage (pdfContext, CGRectMake(0, 0,768, 1024),image); CGImageRelease (image); CGContextEndPage (pdfContext); // We are done with our context now, so we release it CGContextRelease (pdfContext); } 

Answer 1

Hi guys, I prepared some code base using the examples available on the net to create a PDF from UIScrollView. Two things should be clear to us.

1) number of pages 2) Scrollview content

I created a scroll in the size of the content (10 * 910). therefore it has 10 pages. . This is for iPad.

here is the code base

 - (void) createPDF { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *directroyPath = nil; directroyPath = [documentsDirectory stringByAppendingPathComponent:@"PDF"]; NSString *filePath = [directroyPath stringByAppendingPathComponent:@"test.pdf"]; // check for the "PDF" directory NSError *error; if ([[NSFileManager defaultManager] fileExistsAtPath:filePath]) { } else { [[NSFileManager defaultManager] createDirectoryAtPath:directroyPath withIntermediateDirectories:NO attributes:nil error:&error]; } CGContextRef pdfContext = [self createPDFContext:myScrollView.bounds path:(CFStringRef)filePath]; NSLog(@"PDF Context created"); for (int i = 0 ; i< 10 ; i++) { // page 1 CGContextBeginPage (pdfContext,nil); //turn PDF upsidedown CGAffineTransform transform = CGAffineTransformIdentity; transform = CGAffineTransformMakeTranslation(0, (i+1) * 910); transform = CGAffineTransformScale(transform, 1.0, -1.0); CGContextConcatCTM(pdfContext, transform); //Draw view into PDF [myScrollView.layer renderInContext:pdfContext]; CGContextEndPage (pdfContext); [myScrollView setContentOffset:CGPointMake(0, (i+1) * 910) animated:NO]; } CGContextRelease (pdfContext); } - (CGContextRef) createPDFContext:(CGRect)inMediaBox path:(CFStringRef) path { CGContextRef myOutContext = NULL; CFURLRef url; url = CFURLCreateWithFileSystemPath (NULL, path, kCFURLPOSIXPathStyle, false); if (url != NULL) { myOutContext = CGPDFContextCreateWithURL (url, &inMediaBox, NULL); CFRelease(url); } return myOutContext; } 

Answer 2

I came up with another solution:

 -(NSData*)pdfDataFromTableViewContent{ NSMutableData *pdfData = [NSMutableData data]; //The real size, not only the visible part CGSize contentSize = self.tableView.contentSize; CGRect tableViewRealFrame = self.tableView.frame; //Size tableView to show the whole content self.tableView.frame = CGRectMake(0, 0, contentSize.width, contentSize.height); //Generate PDF (one page) UIGraphicsBeginPDFContextToData(pdfData,self.tableView.frame, nil); UIGraphicsBeginPDFPage(); [self.tableView.layer renderInContext:UIGraphicsGetCurrentContext()]; UIGraphicsEndPDFContext(); //Resize frame self.tableView.frame = tableViewRealFrame; return pdfData;} 

Position the frame so that it matches the entire contents of the scrollView, capture it in a graphicsContext, resize the frame.

The top code generates one page.
For more pages, I mainly use this:

 //MultiPage CGRect mediaBox = self.tableView.frame; CGSize pageSize = CGSizeMake(self.view.frame.size.width, 800); UIGraphicsBeginPDFContextToData(pdfData, CGRectZero, nil); CGContextRef pdfContext = UIGraphicsGetCurrentContext(); NSInteger currentPage = 0; BOOL done = NO; do { UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0.0, pageSize.width, pageSize.height), nil); CGContextTranslateCTM(pdfContext, 0, -(pageSize.height*currentPage)); [self.view.layer renderInContext:pdfContext]; if ((pageSize.height*(currentPage+1)) > mediaBox.size.height) done = YES; else currentPage++; } while (!done); UIGraphicsEndPDFContext(); 

Answer 3

Can you see your sample code, please, I'm trying to do the same.

you can send the source code here, thanks for being very generous [e-mail]

anyway for your problem, maybe this might help:

You capture visible content only because your scroll view matches only the visible content as it should be. You need to resize the scroll to fit the content you need to capture before you start drawing code using something like this:

code: self.scrollView.frame = CGRectMake (0, 0, "your content width is here", "your content height is here"); After you finish drawing, be sure to change the scroll size to the background, in this case, the container view:

code: self.scrollView.frame = CGRectMake (0, 0, self.view.frame.size.width, self.view.frame.size.height);