BannerScrollView

一个封装好的轮播图

需要Self提供数据（Pic & Desc 为两个Array）根据数组内元素个数自动生成 PageControl，可以是本地或网络，使用SDWebImage加载，项目中要 Pod 'SDWebImage'

---

创建：

    let imgs = ["1", "2", "3", "w", "2", "4"]
    let desc = ["1", "2", "3", "4", "5", "6"]
    let bannerScrollView = BannerScrollView(
                                        frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 300),
                                        type: .LOCAL,
                                        imgs: imgs,
                                        descs: desc,
                                        defaultDotImage: UIImage(named: "default"),
                                        currentDotImage: UIImage(named: "select"),
                                        placeholderImage: UIImage(named: "pic"))
    bannerScrollView.delegate = self
    self.view.addSubview(bannerScrollView)

属性：

     // Default 4s
    bannerScrollView.autoScrollInterval
    
    bannerScrollView.imageContentModel
    
    bannerScrollView.currentDotColor
    bannerScrollView.otherDotColor
    bannerScrollView.currentPageDotImage
    bannerScrollView.defaultPageDotImage
    
    bannerScrollView.descLabelFont
    bannerScrollView.descLabelHeight
    bannerScrollView.descLabelTextAlignment
    bannerScrollView.descLabelTextColor
    // DescLabelBackgroundColor Default Balck, Alpha: 0.5
    bannerScrollView.bottomViewBackgroundColor
    
    bannerScrollView.isAutoScroll
    bannerScrollView.isEndlessScroll

    bannerScrollView.outerPageControlFrame

    bannerScrollView.pageControlAliment
    bannerScrollView.pageControlPointSpace
    bannerScrollView.placeholderImage
    bannerScrollView.showPageControl