Hi All,
I am trying to create a pdf document that contains a grid of images with titles
underneath. I successfully create the pdf with the image, but the text does
not appear.
My code, more or less, follows the examples in the Quartz 2D guide for drawing
text. But obviously I am doing something incorrectly. The code is posted below.
Using NSLog(), I can validate that the title strings actually contains
something and have a valid length. When I comment out the code for drawing the
images, I don't see any title text underneath where the image was placed.
Are there any additional steps I need to take to get the text into my pdf? Am
I missing something obvious?
TIA,
douglas
---
//+
// Create a PDF document to hold the contact sheet items
//-
pdfContext = CGPDFContextCreateWithURL( (CFURLRef)targetURL,
&paperRectangle, NULL );
CGContextSelectFont( pdfContext, "Helvetica", 10, kCGEncodingMacRoman );
CGContextSetCharacterSpacing( pdfContext, 10 );
CGContextSetStrokeColorWithColor( pdfContext, CGColorGetConstantColor(
kCGColorBlack ));
CGContextSetFillColorWithColor( pdfContext, CGColorGetConstantColor(
kCGColorBlack ));
CGContextSetTextDrawingMode( pdfContext, kCGTextFillStroke );
CGContextSetTextMatrix( pdfContext, CGAffineTransformIdentity );
pageInfo = CFDictionaryCreateMutable( NULL, 0,
&kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks );
boxData = CFDataCreate( NULL, (const UInt8 *)&paperRectangle, sizeof
(CGRect) );
CFDictionarySetValue( pageInfo, kCGPDFContextMediaBox, boxData );
pageIndex = 1;
while ( pageIndex <= self.numberOfPages )
{
CGPDFContextBeginPage( pdfContext, pageInfo );
imageIndex = ( pageIndex - 1 ) * ( self.numberOfColumns *
self.numberOfRows );
rowIndex = 0;
columnIndex = 0;
horizontalPosition = leftMargin + paperRectangle.origin.x;
verticalPosition = CGRectGetMaxY( paperRectangle ) - topMargin -
imageHeight;
//+
// Draw all the images on this page
//-
while ( imageIndex < [self.contactSheetItems count] && imageIndex <
( pageIndex * ( self.numberOfColumns * self.numberOfRows )))
{
item = [self.contactSheetItems objectAtIndex: imageIndex];
itemImage = (CGImageRef)[item imageRepresentation];
targetRectangle = CGRectMake( horizontalPosition,
verticalPosition + titleOffset, imageWidth, imageHeight - titleOffset);
itemRectangle = AVMakeRectWithAspectRatioInsideRect(
CGSizeMake( CGImageGetWidth( itemImage ), CGImageGetHeight( itemImage )),
targetRectangle );
CGContextDrawImage( pdfContext, itemRectangle, itemImage );
CGContextSetTextPosition( pdfContext, horizontalPosition,
itemRectangle.origin.y - titleOffset );
CGContextShowText( pdfContext, [[item imageTitle]
UTF8String], [[item imageTitle] length] );
NSLog( @"-- title: %@, length: %ld", [item imageTitle],
[[item imageTitle] length] );
columnIndex++;
if ( columnIndex >= self.numberOfColumns )
{
columnIndex = 0;
horizontalPosition = leftMargin +
paperRectangle.origin.x;
rowIndex++;
if ( rowIndex >= self.numberOfRows )
{
rowIndex = 0;
verticalPosition = CGRectGetMaxY( paperRectangle
) - imageHeight;
}
else
verticalPosition = verticalPosition -
imageHeight - adjustedIntercellSpacing;
}
else
horizontalPosition = horizontalPosition +
imageWidth + adjustedIntercellSpacing;
imageIndex++;
}
CGPDFContextEndPage( pdfContext );
pageIndex++;
}
//+
// All done
//-
CGContextRelease( pdfContext );
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