效果如上图所示
调用方法：
let scrollView = LXJSycleScrollView(frame: CGRect(x: 0, y: 64, width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.width / 2))
//当前选中颜色
scrollView.currentPageColor = UIColor.gray
scrollView.pageColor = UIColor.white
//默认占位图
scrollView.placeHolderImage = UIImage (named: "place_image")
scrollView.timeSeconds = 2
scrollView.delegate = self
view.addSubview(scrollView)
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 1, execute: {
//存放图片的数组，本地和网络的都可以
scrollView.imageArray = ["001.jpg","002.jpg","003.jpg","http://tupian.enterdesk.com/2015/gha/09/1502/01.jpg","http://img.ithome.com/newsuploadfiles/2016/3/20160317_080446_325.jpg"]
})
//点击的回调方法，需要遵循协议
func didClickBannerIndex(index: Int) {
print("点击了第\(index)个")
}
需要使用Kingfisher这个三方框架
