DLPanableWebViewHandler代理中直接调用[navPanTarget_ performSelector:navPanAction_ withObject:pan];会使得程序假死。

[andybin-cn]

如果WebView是在navigationController的RootViewController中，在DLPanableWebViewHandler的代理中直接调用[navPanTarget_ performSelector:navPanAction_ withObject:pan];会使得程序假死。
我的处理方式：

• (void)DLPanableWebView:(DLPanableWebView *)webView panPopGesture:(UIPanGestureRecognizer *)pan{
  if ( self.navigationController.viewControllers.count < 2 && self == [self.navigationController.viewControllers objectAtIndex:0] )
  {
  return;
  }
  if (navPanTarget_ && [navPanTarget_ respondsToSelector:navPanAction_]) {
  [navPanTarget_ performSelector:navPanAction_ withObject:pan];
  }
  }