NSString *textStr = @"iPhone规定：任何应用想访问麦克风，必须被授权麦克风服务。请进入“设置”->“隐私”->“麦克风”中打开QQ空间的麦克风服务。";

        UIFont *textFont = [UIFont systemFontOfSize:14];

        CGSize textSize = [textStr sizeWithFont:textFont

                              constrainedToSize:CGSizeMake(bounds.size.width - 40, QZONE_SCREEN_HEIGHT)];;

        UILabel *openMicPrivilegeTipsLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 20, textSize.width, textSize.height)];

        openMicPrivilegeTipsLabel.textColor = DefaultDescriptionText2ColorInDefaultTheme;

        openMicPrivilegeTipsLabel.text = textStr;

        openMicPrivilegeTipsLabel.backgroundColor = [UIColor clearColor];

        openMicPrivilegeTipsLabel.textAlignment = UITextAlignmentLeft;

        openMicPrivilegeTipsLabel.font = [UIFont systemFontOfSize:14];

        openMicPrivilegeTipsLabel.numberOfLines = 0;

        // 调整行间距

        NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:textStr];

        NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];

        [paragraphStyle setLineSpacing:6];

        [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [textStr length])];

        openMicPrivilegeTipsLabel.attributedText = attributedString;

        [_tipsBG addSubview:openMicPrivilegeTipsLabel];

        [openMicPrivilegeTipsLabel sizeToFit];