Creating multi page PDF from text content - ios

Question

I have a long text content and wanted to convert it in to a multipage PDF file.
I have followed the instructions provided in this tutorial http://www.raywenderlich.com/6581/how-to-create-a-pdf-with-quartz-2d-in-ios-5-tutorial-part-1.
But I am struggling to make the pdf multi page.
The code I'm using can create single page PDF.
+(void)drawText
{
NSString* textToDraw = #"The sample text";
CFStringRef stringRef = (__bridge CFStringRef)textToDraw;
// Prepare the text using a Core Text Framesetter
CFAttributedStringRef currentText = CFAttributedStringCreate(NULL, stringRef, NULL);
CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(currentText);
CGRect frameRect = CGRectMake(50, 50, 512, 1000);
CGMutablePathRef framePath = CGPathCreateMutable();
CGPathAddRect(framePath, NULL, frameRect);
// Get the frame that will do the rendering.
CFRange currentRange = CFRangeMake(0, 0);
CTFrameRef frameRef = CTFramesetterCreateFrame(framesetter, currentRange, framePath, NULL);
CGPathRelease(framePath);
// Get the graphics context.
CGContextRef currentContext = UIGraphicsGetCurrentContext();
// Put the text matrix into a known state. This ensures
// that no old scaling factors are left in place.
CGContextSetTextMatrix(currentContext, CGAffineTransformIdentity);
// Core Text draws from the bottom-left corner up, so flip
// the current transform prior to drawing.
CGContextTranslateCTM(currentContext, 0, 100);
CGContextScaleCTM(currentContext, 1.0, -1.0);
// Draw the frame.
CTFrameDraw(frameRef, currentContext);
CFRelease(frameRef);
CFRelease(stringRef);
CFRelease(framesetter);
}
+(void)drawPDF:(NSString*)fileName
{
// Create the PDF context using the default page size of 612 x 792.
UIGraphicsBeginPDFContextToFile(fileName, CGRectZero, nil);
// Mark the beginning of a new page.
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, 612, 792), nil);
[self drawText];
// Close the PDF context and write the contents out.
UIGraphicsEndPDFContext();
}

Answer 1

you can draw pdf using following code:
// Use Core Text to draw the text in a frame on the page.
- (CFRange)renderPage:(NSInteger)pageNum withTextRange:(CFRange)currentRange
andFramesetter:(CTFramesetterRef)framesetter
{
// Get the graphics context.
CGContextRef currentContext = UIGraphicsGetCurrentContext();
// Put the text matrix into a known state. This ensures
// that no old scaling factors are left in place.
CGContextSetTextMatrix(currentContext, CGAffineTransformIdentity);
// Create a path object to enclose the text. Use 72 point
// margins all around the text.
CGRect frameRect = CGRectMake(72, 72, 468, 648);
CGMutablePathRef framePath = CGPathCreateMutable();
CGPathAddRect(framePath, NULL, frameRect);
// Get the frame that will do the rendering.
// The currentRange variable specifies only the starting point. The framesetter
// lays out as much text as will fit into the frame.
CTFrameRef frameRef = CTFramesetterCreateFrame(framesetter, currentRange, framePath, NULL);
CGPathRelease(framePath);
// Core Text draws from the bottom-left corner up, so flip
// the current transform prior to drawing.
CGContextTranslateCTM(currentContext, 0, kDefaultPageHeight);
CGContextScaleCTM(currentContext, 1.0, -1.0);
// Draw the frame.
CTFrameDraw(frameRef, currentContext);
// Update the current range based on what was drawn.
currentRange = CTFrameGetVisibleStringRange(frameRef);
currentRange.location += currentRange.length;
currentRange.length = 0;
CFRelease(frameRef);
return currentRange;
}
- (void)drawPageNumber:(NSInteger)pageNum
{
NSString* pageString = [NSString stringWithFormat:#"Page %ld", (long)pageNum];
UIFont* theFont = [UIFont systemFontOfSize:12];
// CGSize maxSize = CGSizeMake(kDefaultPageWidth, 72);
CGSize pageStringSize = [pageString sizeWithAttributes:
#{NSFontAttributeName:
theFont}];
// CGSize pageStringSize = [pageString sizeWithFont:theFont
// constrainedToSize:maxSize
// lineBreakMode:NSLineBreakByClipping];
CGRect stringRect = CGRectMake(((kDefaultPageWidth - pageStringSize.width) / 2.0),
720.0 + ((72.0 - pageStringSize.height) / 2.0) ,
pageStringSize.width,
pageStringSize.height);
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping;
NSDictionary *attributes = #{NSFontAttributeName: [UIFont systemFontOfSize:15], NSParagraphStyleAttributeName: paragraphStyle};
[pageString drawInRect:stringRect withAttributes:attributes];
// [pageString drawInRect:stringRect withFont:theFont];
}
For save pdf:
- (IBAction)savePDFFile:(id)sender
{
NSString* path = [[NSBundle mainBundle] pathForResource:#"sampleData" ofType:#"plist"];
// get a temprorary filename for this PDF
path = NSTemporaryDirectory();
self.pdfFilePath = [path stringByAppendingPathComponent:
[NSString stringWithFormat:#"%d.pdf",
[[NSDate date]
timeIntervalSince1970] ]];
// Prepare the text using a Core Text Framesetter
CFAttributedStringRef currentText = CFAttributedStringCreate(NULL,
(CFStringRef)textView.text, NULL);
if (currentText) {
CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(currentText);
if (framesetter) {
NSString* pdfFileName = self.pdfFilePath; //[NSString stringWithString:#"test.pdf"];
// Create the PDF context using the default page: currently constants at the size
// of 612 x 792.
UIGraphicsBeginPDFContextToFile(pdfFileName, CGRectZero, nil);
CFRange currentRange = CFRangeMake(0, 0);
NSInteger currentPage = 0;
BOOL done = NO;
do {
// Mark the beginning of a new page.
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, kDefaultPageWidth,
kDefaultPageHeight), nil);
// Draw a page number at the bottom of each page
currentPage++;
[self drawPageNumber:currentPage];
// Render the current page and update the current range to
// point to the beginning of the next page.
currentRange = [self renderPage:currentPage withTextRange:
currentRange andFramesetter:framesetter];
// If we're at the end of the text, exit the loop.
if (currentRange.location == CFAttributedStringGetLength
((CFAttributedStringRef)currentText))
done = YES;
} while (!done);
// Close the PDF context and write the contents out.
UIGraphicsEndPDFContext();
// Release the framewetter.
CFRelease(framesetter);
} else {
NSLog(#"Could not create the framesetter needed to lay out the atrributed string.");
}
// Release the attributed string.
CFRelease(currentText);
} else {
NSLog(#"Could not create the attributed string for the framesetter");
}
// Ask the user if they'd like to see the file or email it.
UIActionSheet* actionSheet = [[[UIActionSheet alloc] initWithTitle:#"Would you like to preview or email this PDF?"
delegate:self
cancelButtonTitle:#"Cancel"
destructiveButtonTitle:nil
otherButtonTitles:#"Preview", #"Email", nil] autorelease];
[actionSheet showInView:self.view];
}
here it is full demo please check: http://ge.tt/1eW8iJt1/v/0