//MARK:-
    //MARK:automatic scrollView with web images
    convenience init(frame:CGRect, placeHolder placeHolderImage:UIImage?,remoteImageUrls imgs:Array<String>?, selectImageAction imageDidSelectedAction:@escaping FGImageClickBlock){
        
        self.init(frame: frame)
        self.createLoacalCacheFolder()
        self.placeHolderImage=placeHolderImage
        self.didSelectedImageAction=imageDidSelectedAction
        self.imageUrlArray=imgs
        DispatchQueue.main.async {
            self.createScrollView()
        }
    }

    //MARK:automatic scrollView with local images
    convenience init(frame:CGRect,placeHolder placeHolderImage:UIImage?,localImageNames imgs:Array<String>?, selectImageAction imageDidSelectedAction:@escaping FGImageClickBlock){
        
        self.init(frame: frame)
        self.placeHolderImage=placeHolderImage
        var fileUrlsArray:Array<String>=[]
        for name in imgs!{
            
            var path:String?
            if name.hasSuffix("jpg")||name.hasSuffix("png"){
                path=Bundle.main.path(forResource: name, ofType: nil)
            }
            else{
                path=Bundle.main.path(forResource: name, ofType: "png")
            }
            if path==nil{
                path=""
            }
            path=path?.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed)
            let fullPath=String.init(format: "file://%@", path!)
            fileUrlsArray.append(fullPath)
        }
        self.didSelectedImageAction=imageDidSelectedAction
        self.imageUrlArray=fileUrlsArray
        self.createScrollView()
    }

self.banner?.imageDidScrolledBlock={ (currentIndex) in

    print("滚到到了第"+String(currentIndex)+"页了")
}