         let width = CGFloat(50.0)
         let height = CGFloat(50.0)
         
-        activityIndicatorView = NVActivityIndicatorView(frame: CGRectMake(x, y, width, height), type: .BallClipRotatePulse, color: UIColor.lightGrayColor(), size: CGSizeMake(50, 50))
+        activityIndicatorView = NVActivityIndicatorView(frame: CGRectMake(x, y, width, height), type: .BallClipRotatePulse, color: ThemeColor, size: CGSizeMake(50, 50))
         activityIndicatorView.center = self.view.center
         self.view.addSubview(activityIndicatorView)
 

            BlackStatusBar()
        }
        
        if (-offSetY <= 40 && -offSetY >= 20) {
            if !viewModel.hasPrevious {
                return
            }

            self.isLoading = true
            //上一条新闻
            getPreviousNews()
        }else if (-offSetY > 60) {//到－80 让webview不再能被拉动
            self.webView.scrollView.contentOffset = CGPointMake(0, -60);
        }
        
        if (offSetY + ScreenHeight + 80 > scrollView.contentSize.height  && !self.webView.scrollView.dragging) {
            if !viewModel.hasNext {
                return
            }
