The other answers didn’t work for multiple lines. Therefore I initially continued using the undocumented cFlags.vCentered
property, but that caused my app to be rejected from the app store. I ended up using a modified version of Matt Bell’s solution that works for multiple lines, word wrapping, and a truncated last line:
-(void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView {
NSAttributedString *attrString = self.attributedStringValue;
/* if your values can be attributed strings, make them white when selected */
if (self.isHighlighted && self.backgroundStyle==NSBackgroundStyleDark) {
NSMutableAttributedString *whiteString = attrString.mutableCopy;
[whiteString addAttribute: NSForegroundColorAttributeName
value: [NSColor whiteColor]
range: NSMakeRange(0, whiteString.length) ];
attrString = whiteString;
}
[attrString drawWithRect: [self titleRectForBounds:cellFrame]
options: NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesLineFragmentOrigin];
}
- (NSRect)titleRectForBounds:(NSRect)theRect {
/* get the standard text content rectangle */
NSRect titleFrame = [super titleRectForBounds:theRect];
/* find out how big the rendered text will be */
NSAttributedString *attrString = self.attributedStringValue;
NSRect textRect = [attrString boundingRectWithSize: titleFrame.size
options: NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesLineFragmentOrigin ];
/* If the height of the rendered text is less then the available height,
* we modify the titleRect to center the text vertically */
if (textRect.size.height < titleFrame.size.height) {
titleFrame.origin.y = theRect.origin.y + (theRect.size.height - textRect.size.height) / 2.0;
titleFrame.size.height = textRect.size.height;
}
return titleFrame;
}
(This code assumes ARC; add an autorelease after attrString.mutableCopy if you use manual memory management)