pageView.preLoadRange = 1...3 //当前控制器的左边预加载1个，右边预加载3个

self.tabBarItem.badgeValue = "\(indexPath.row)"//红点设置为LLSegmentRedBadgeValue

class SimpDemoViewController: LLSegmentViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        loadSegmentedConfig()
    }
}

extension SimpDemoViewController{
    func loadSegmentedConfig() {
        layoutContentView()
        loadCtls()
        setUpSegmentStyle()
    }

    func layoutContentView() {
        self.layoutInfo.segmentControlPositionType = .top(size: CGSize.init(width: UIScreen.main.bounds.width, height: 44),offset:0)
        self.relayoutSubViews()
    }

    func loadCtls() {
        let introCtl = UIViewController()
        introCtl.title = "简介"
        introCtl.view.backgroundColor = UIColor.yellow
        
        let catalogCtl = UIViewController()
        catalogCtl.title = "目录"
        catalogCtl.view.backgroundColor = UIColor.red
        
        let ctls =  [introCtl,catalogCtl]
        reloadViewControllers(ctls:ctls)
    }

    func setUpSegmentStyle() {
        let itemStyle = LLSegmentItemTitleViewStyle()
        itemStyle.selectedColor = UIColor.init(red: 50/255.0, green: 50/255.0, blue: 50/255.0, alpha: 1)
        itemStyle.unSelectedColor = UIColor.init(red: 136/255.0, green: 136/255.0, blue: 136/255.0, alpha: 1)
        itemStyle.selectedTitleScale = 1
        itemStyle.titleFontSize = 15
        itemStyle.itemWidth = UIScreen.main.bounds.width/CGFloat(ctls.count)//如果不指定是自动适配的
        //这里可以继续增加itemStyle的其他配置项... ...

        segmentCtlView.backgroundColor = UIColor.white
        segmentCtlView.separatorLineShowEnabled = true //间隔线显示，默认不显示
        //还有其他配置项：颜色、宽度、上下的间隔...

        segmentCtlView.bottomSeparatorStyle = (1,UIColor.red) //分割线:默认透明色
        segmentCtlView.indicatorView.widthChangeStyle = .stationary(baseWidth: 11)//横杆宽度:有默认值
        segmentCtlView.indicatorView.centerYGradientStyle = .bottom(margin: 0)//横杆位置:有默认值
        segmentCtlView.indicatorView.shapeStyle = .custom //形状样式:有默认值

        var segmentedCtlStyle = LLSegmentedControlStyle()
        segmentedCtlStyle.segmentItemViewClass = LLSegmentItemTitleView.self  //ItemView和ItemViewStyle要统一对应
        segmentedCtlStyle.itemViewStyle = itemStyle
        segmentCtlView.reloadData(ctlViewStyle: segmentedCtlStyle)
    }

//1、设置标题
public func titleChange(title:String)
//2、滚动时会调用这个方法，percent的取值范围是0...1
public func percentChange(percent:CGFloat)
//3、返回当前ItemView的宽度
public func itemWidth() ->CGFloat
//4、设置Item的style样式
public func setSegmentItemViewStyle(itemViewStyle:LLSegmentItemViewStyle)