第一步：先实现代理UIScrollViewDelegate

image.png

• (UIWebView *)webView
  {
  if (!_webView)
  {
  UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 20, YFkScreenWidth, YFkScreenHeight-20 )];
  webView.delegate = self;
  webView.scrollView.delegate = self;
  [self.view addSubview:webView];
  _webView = webView;

  }
  return _webView;
  }

  
  
  image.png

第二步：实现UIScrollView滑动事件监听

pragma mark - scrollView协议

• (void)scrollViewDidScroll:(UIScrollView *)scrollView{
  //禁止webView底部回弹效果
  if (scrollView.contentSize.height - scrollView.contentOffset.y <= YFkScreenHeight-20) {
  self.webView.scrollView.bounces=NO;
  }else{
  self.webView.scrollView.bounces=YES;
  }
  }

  
  
  image.png