attribute-string.m

NSMutableAttributedString *attrStr = [NSMutableAttributedString attributedStringWithString:content];
range = NSMakeRange(0, [attrStr length]);

[attrStr setFont:[UIFont fontWithName:LBFontBryantMedium size:16]];
[attrStr setTextAlignment:CTTextAlignmentFromUITextAlignment(UITextAlignmentLeft) 
            lineBreakMode:CTLineBreakModeFromUILineBreakMode(UILineBreakModeWordWrap)];
[attrStr addAttribute:(NSString *)kCTKernAttributeName
                value:[NSNumber numberWithFloat:-0.4]
                range:range];
[attrStr addAttribute:(NSString *)kCTParagraphStyleAttributeName
                value:(id)[NSAttributedString paragraphStyleWithLineSpacing:7.0f andAlignment:kCTLeftTextAlignment] 
                range:range];

paragraph-style.m

+ (CTParagraphStyleRef)paragraphStyleWithLineSpacing:(CGFloat)lineSpacing
                                        andAlignment:(CTTextAlignment)alignment
{
    CTParagraphStyleSetting settings[] = {
        {kCTParagraphStyleSpecifierLineSpacing, sizeof(lineSpacing), &lineSpacing},
        {kCTParagraphStyleSpecifierAlignment, sizeof(alignment), &alignment}
    };
    CTParagraphStyleRef ref = CTParagraphStyleCreate(settings, sizeof(settings) / sizeof(settings[0]));
    return ref;
}