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Errors when creating a multi-page PDF file

Has anyone already created a PDF document in an iPad application? I see that there are new features in UIKit, but I cannot find any sample code for it.

BOOL UIGraphicsBeginPDFContextToFile ( NSString *path, CGRect bounds, NSDictionary *documentInfo ); void UIGraphicsBeginPDFPage ( void );

I found an example that should work on the iPhone, but this gives me errors:

 Fri Apr 30 11:55:32 wks104.hs.local PDF[1963] <Error>: CGFont/Freetype: The function `create_subset' is currently unimplemented. Fri Apr 30 11:55:32 wks104.hs.local PDF[1963] <Error>: invalid Type1 font: unable to stream font. Fri Apr 30 11:55:32 wks104.hs.local PDF[1963] <Error>: FT_Load_Glyph failed: error 6. Fri Apr 30 11:55:32 wks104.hs.local PDF[1963] <Error>: FT_Load_Glyph failed: error 6. Fri Apr 30 11:55:32 wks104.hs.local PDF[1963] <Error>: FT_Load_Glyph failed: error 6. Fri Apr 30 11:55:32 wks104.hs.local PDF[1963] <Error>: FT_Load_Glyph failed: error 6.
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4 answers

This is the best solution because it uses the correct coordinate transformation to get text to print from top to bottom.

 #define LEFT_MARGIN 25 #define RIGHT_MARGIN 25 #define TOP_MARGIN 35 #define BOTTOM_MARGIN 50 #define BOTTOM_FOOTER_MARGIN 32 #define DOC_WIDTH 595 #define DOC_HEIGHT 842 - (void) createPDF:(NSString *)fileName withContent:(NSString *)content forSize:(int)fontSize andFont:(NSString *)font andColor:(UIColor *)color { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *newFilePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:fileName]; CGRect a4Page = CGRectMake(0, 0, DOC_WIDTH, DOC_HEIGHT); NSDictionary *fileMetaData = [[NSDictionary alloc] init]; if (!UIGraphicsBeginPDFContextToFile(newFilePath, a4Page, fileMetaData )) { NSLog(@"error creating PDF context"); return; } CGContextRef context = UIGraphicsGetCurrentContext(); UIGraphicsBeginPDFPage(); CGContextSetTextDrawingMode (context, kCGTextFill); CGContextSelectFont (context, [font cStringUsingEncoding:NSUTF8StringEncoding], fontSize, kCGEncodingMacRoman); CGContextSetFillColorWithColor(context, [color CGColor]); CGMutablePathRef path = CGPathCreateMutable(); CGRect bounds = CGRectMake(LEFT_MARGIN, TOP_MARGIN, DOC_WIDTH - RIGHT_MARGIN - LEFT_MARGIN, DOC_HEIGHT - TOP_MARGIN - BOTTOM_MARGIN ); CGPathAddRect(path, NULL, bounds); // Initialize an attributed string. CFMutableAttributedStringRef attrString = CFAttributedStringCreateMutable(kCFAllocatorDefault, 0); CFAttributedStringReplaceString (attrString, CFRangeMake(0, 0), (CFStringRef)content); // Create the framesetter with the attributed string. CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(attrString); // Create the frame and draw it into the graphics context CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), path, NULL); CFRange visibleRange = CTFrameGetVisibleStringRange(frame); if (visibleRange.length < [content length] ) { NSLog(@"WARNING: Not all displayed on a single page"); } CFRelease(attrString); CFRelease(framesetter); if(frame) { CGContextSaveGState(context); CGContextTranslateCTM(context, 0, bounds.origin.y); CGContextScaleCTM(context, 1, -1); CGContextTranslateCTM(context, 0, -(bounds.origin.y + bounds.size.height)); CTFrameDraw(frame, context); CGContextRestoreGState(context); CFRelease(frame); } UIGraphicsEndPDFContext(); [fileMetaData release]; }
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In fact, I created a multi-page PDF creation by changing the code above, for example:

 - (void) createPDF:(NSString *)fileName withContent:(NSString *)content forSize:(int)fontSize andFont:(NSString *)font andColor:(UIColor *)color { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *newFilePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:fileName]; CGRect a4Page = CGRectMake(0, 0, DOC_WIDTH, DOC_HEIGHT); NSDictionary *fileMetaData = [[NSDictionary alloc] init]; if (!UIGraphicsBeginPDFContextToFile(newFilePath, a4Page, fileMetaData )) { NSLog(@"error creating PDF context"); return; } BOOL done = NO; CGContextRef context = UIGraphicsGetCurrentContext(); CFRange currentRange = CFRangeMake(0, 0); CGContextSetTextDrawingMode (context, kCGTextFill); CGContextSelectFont (context, [font cStringUsingEncoding:NSUTF8StringEncoding], fontSize, kCGEncodingMacRoman); CGContextSetFillColorWithColor(context, [color CGColor]); // Initialize an attributed string. CFMutableAttributedStringRef attrString = CFAttributedStringCreateMutable(kCFAllocatorDefault, 0); CFAttributedStringReplaceString (attrString, currentRange, (CFStringRef)content); // Create the framesetter with the attributed string. CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(attrString); do { UIGraphicsBeginPDFPage(); CGMutablePathRef path = CGPathCreateMutable(); CGRect bounds = CGRectMake(LEFT_MARGIN, TOP_MARGIN, DOC_WIDTH - RIGHT_MARGIN - LEFT_MARGIN, DOC_HEIGHT - TOP_MARGIN - BOTTOM_MARGIN); CGPathAddRect(path, NULL, bounds); // Create the frame and draw it into the graphics context CTFrameRef frame = CTFramesetterCreateFrame(framesetter, currentRange, path, NULL); if(frame) { CGContextSaveGState(context); CGContextTranslateCTM(context, 0, bounds.origin.y); CGContextScaleCTM(context, 1, -1); CGContextTranslateCTM(context, 0, -(bounds.origin.y + bounds.size.height)); CTFrameDraw(frame, context); CGContextRestoreGState(context); // Update the current range based on what was drawn. currentRange = CTFrameGetVisibleStringRange(frame); currentRange.location += currentRange.length; currentRange.length = 0; CFRelease(frame); } // If we're at the end of the text, exit the loop. if (currentRange.location == CFAttributedStringGetLength((CFAttributedStringRef)attrString)) done = YES; } while(!done); UIGraphicsEndPDFContext(); [fileMetaData release]; CFRelease(attrString); CFRelease(framesetter); }

However, as mentioned above, it ignores the font I'm trying to install. I always get something like "Helvetica".

So, there is currently no way to create a PDF file on an iPad / iPhone that includes the font used on the device? I can hardly believe it. I would at least hope for these “regular suspect” fonts such as Courier, Times New Roman, etc., to be supported.

If anyone has additional information or helpful hints for workarounds, please share it.

Thanks in advance.

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Here is a method that will create a new PDF document. However, it does not format the text.

  - (void) createNewPDF: (NSString *) saveFileName withContent: (NSString *) content forSize: (int) fontSize andFont:(NSString *) font andColor: (UIColor *) color { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *newFilePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:saveFileName]; CGRect a4Page = CGRectMake(0, 0, 595, 842); NSDictionary *fileMetaData = [[NSDictionary alloc] init]; if (!UIGraphicsBeginPDFContextToFile(newFilePath, a4Page, fileMetaData )) { NSLog(@"error creating PDF context"); return; } CGContextRef mpdfContext = UIGraphicsGetCurrentContext(); UIGraphicsBeginPDFPage(); CGContextSetTextMatrix(mpdfContext, CGAffineTransformMake(1, 0, 0, -1, 0, 0)); CGContextSetTextDrawingMode (mpdfContext, kCGTextFill); CGContextSelectFont (mpdfContext, [font cStringUsingEncoding:NSUTF8StringEncoding], fontSize, kCGEncodingMacRoman); CGContextSetFillColorWithColor(mpdfContext, [color CGColor]); CGContextShowTextAtPoint (mpdfContext, 20, 20, [content cStringUsingEncoding:NSUTF8StringEncoding], [content length]); UIGraphicsEndPDFContext(); }
+2
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so you know that the error message is:

Invalid Type1 font: cannot stream

and: FT_Load_Glyph error: error 6.

disappeared in iOS 4.2

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