iOS计算富文本(NSMutableAttributedString)高度

     有时候开发中我们为了样式好看, 需要对文本设置富文本属性, 设置完后那么怎样计算其高度呢, 很简单, 方法如下:

- (NSInteger)hideLabelLayoutHeight:(NSString *)content withTextFontSize:(CGFloat)mFontSize
{
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];

    paragraphStyle.lineSpacing = 10;  // 段落高度

    NSMutableAttributedString *attributes = [[NSMutableAttributedString alloc] initWithString:content];

    [attributes addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:mFontSize] range:NSMakeRange(0, content.length)];
    [attributes addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, content.length)];

    CGSize attSize = [attributes boundingRectWithSize:CGSizeMake(200, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading context:nil].size;

    return attSize.height;
}

   使用时:

[self hideLabelLayoutHeight:nameStr withTextFontSize:14]