- (void)drawRect:(NSRect)dirtyRect {
    [super drawRect:dirtyRect];

    NSMutableParagraphStyle *textStyle = [[NSMutableParagraphStyle alloc] init];
    [textStyle setAlignment:NSTextAlignmentCenter];
    [textStyle setLineBreakMode:NSLineBreakByTruncatingTail];    
    NSDictionary *attributes = @{NSFontAttributeName: [NSFont systemFontOfSize:18],
                                 NSForegroundColorAttributeName: [NSColor whiteColor],
                                 NSParagraphStyleAttributeName: textStyle};    
                                 float w = self.frame.size.width;    
                                 float h = self.frame.size.height;    
                                 float str_h = 20;

    NSAttributedString *attributedText4 = [[NSAttributedString alloc] initWithString:@"这是一个 string" attributes:attributes];
}

 - (void)countHeight{    NSString *originStr = @"ashdhsaksah 和就会撒大声地哈萨克的";

    NSMutableAttributedString *attriStr = [[NSMutableAttributedString alloc] initWithString:originStr];
    NSFont *descFont = [NSFont systemFontOfSize:16];

    NSMutableParagraphStyle *descStyle = [[NSMutableParagraphStyle alloc]init];
    [descStyle setLineSpacing:1];//行间距

    CGFloat destinW = 100;    CGSize descSize = [originStr boundingRectWithSize:CGSizeMake(destinW, MAXFLOAT)
                                                options:NSStringDrawingUsesLineFragmentOrigin
                                             attributes:@{NSFontAttributeName:descFont,
                                                          NSParagraphStyleAttributeName :descStyle}
                                                context:nil].size;

}

alignment - 对齐方式
firstLineHeadIndent - 首行缩进
headIndent -  缩进
tailIndent -  尾部缩进
lineBreakMode - 断行方式
maximumLineHeight - 最大行高
minimumLineHeight - 最低行高
lineSpacing - 行距
paragraphSpacing  -段距
paragraphSpacingBefore - 段首空间
baseWritingDirection - 句子方向
lineHeightMultiple - 可变行高,乘因数。
hyphenationFactor - 连字符属性