Core Text - Calculating line height

gistfile1.m

CGFloat GetLineHeightForFont(CTFontRef iFont)
{
    CGFloat lineHeight = 0.0;
 
    check(iFont != NULL);
 
    // Get the ascent from the font, already scaled for the font's size
    lineHeight += CTFontGetAscent(iFont);
 
    // Get the descent from the font, already scaled for the font's size
    lineHeight += CTFontGetDescent(iFont);
 
    // Get the leading from the font, already scaled for the font's size
    lineHeight += CTFontGetLeading(iFont);
 
    return lineHeight;
}