Hi all,
I'm trying to solve my CoreText problem with paragraph text drawing. It draws
my paragraph perfectly, but it doesn't draw the last line in some cases. I have
no idea why.
Here's the frame size calculation method ...
- (CGSize)sizeThatFits:(CGSize)size {
CFRange labelFitRange;
CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(
__labelData.attributedString );
CGSize labelSize = CTFramesetterSuggestFrameSizeWithConstraints( framesetter,
CFRangeMake( 0, 0 ),
NULL,
CGSizeMake( size.width, CGFLOAT_MAX ), &labelFitRange );
CFRelease( framesetter );
if ( labelFitRange.location != 0 || labelFitRange.length !=
CFAttributedStringGetLength( __labelData.attributedString ) ) {
NSLog( @"The whole string doesn't fit. Range: %d.%d != 0.%d",
(int)labelFitRange.location, (int)labelFitRange.length,
(int)CFAttributedStringGetLength( __labelData.attributedString ) );
}
return labelSize;
}
... and here's the -drawRect:(CGRect)rect method ...
- (void)drawRect:(CGRect)rect {
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextSaveGState( ctx );
CGContextTranslateCTM( ctx, 0, rect.size.height );
CGContextScaleCTM( ctx, 1.0f, -1.0f );
CGContextSetTextMatrix( ctx, CGAffineTransformIdentity );
CGMutablePathRef path = CGPathCreateMutable();
CGPathAddRect( path, NULL, rect );
CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(
__labelData.attributedString );
CTFrameRef frame = CTFramesetterCreateFrame( framesetter, CFRangeMake( 0, 0
), path, NULL );
CTFrameDraw( frame, ctx );
CGPathRelease( path );
CFRelease( frame );
CFRelease( framesetter );
CGContextRestoreGState( ctx );
}
... -sizeThatFits: returns numbers like 654.98 x 129.18, etc. I mean not
integers. And when I set the UIView (my label) frame to this size, paragraph
text is visible, but the last line is not drawn sometimes (some paragraphs have
all lines, some of them are missing the last line). I tried everything, even I
was trying to ceil numbers before assigning UIView's frame, I removed all
string attributes, etc. but nothing helps.
Interesting things is, that iOS 3.2.x is much more affected when compared to
the 4.2.1 where number of paragraphs (same text as on 3.2.x) without the last
line is much lower.
Any idea what can be wrong?
Regards,
Robert
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