I wrote an interface "myDrawInRect" to replace the orginal "drawInRect" in NSString.
the code is like following:
.h file:
@interface NSString(TextDrawing)
-(CGSize) myDrawInRect:(CGRect)rect withFont:(UIFont *)font textColor:(UIColor*)textColor
lineBreakMode:(NSLineBreakMode)lineBreakMode alignment:(NSTextAlignment)alignment;
@end
.m file:
@interface NSString(TextDrawing)
-(CGSize) myDrawInRect:(CGRect)rect withFont:(UIFont *)font textColor:(UIColor*)textColor
lineBreakMode:(NSLineBreakMode)lineBreakMode alignment:(NSTextAlignment)alignment
{
CGFloat screen_scale = [UIScreen mainScreen].scale;
CGContextRef bitmapContext = CreateBitmapContext( rect.size.width * screen_scale, rect.size.height * screen_scale );
/* ... some code to draw the bitmapContext; */
CGImageRef image = CGBitmapContextCreateImage( bitmapContext );
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextScaleCTM( context, 1.0f, -1.0f );
CGContextTranslateCTM( context, 0.0f, -CGRectGetHeight(realRect) );
CGContextDrawImage( context, rect, image );
CGContextRelease( bitmapContext );
CGImageRelease( myImage );
}
@end
I invoked myDrawInRect in UILabel drawInRect, but nothing I can see on the label. Can anyone advise? thanks!
Try this