     /// 底部分割线高度
     var lineHeight: CGFloat = 1
     
-    /// 标题按钮字体大小
-    var titleFontSize: CGFloat = 17
+    /// 标题按钮字体
+    var titleFont: UIFont = UIFont.systemFont(ofSize: 17)
     /// 标题按钮背景颜色（普通状态）
     var titleBackgroundColor = UIColor.white
     /// 标题按钮背景颜色（选中状态）

            btn.tag = i
            btn.setTitle(titles[i], for: .normal)
            btn.setTitleColor(titleNomalColor, for: .normal)
            btn.titleLabel?.font = UIFont.systemFont(ofSize: titleFontSize)
            btn.titleLabel?.textAlignment = .center
            btn.backgroundColor = titleBackgroundColor
            btn.addTarget(self, action: #selector(btnClick), for: .touchUpInside)

        topScrollView.addSubview(slideView)
        
        if sliderStyle == .center {
            let attr = [NSAttributedStringKey.font: titleFont]
            let rect = titles[0].size(withAttributes: attr)
            let x = (width - rect.width) * 0.5
            let v = UIView(frame: CGRect(x: x, y: 0, width: rect.width, height: slideHeight))
