ios webview loadrequest的时候报的错，请问这怎么处理啊？

void SendDelegateMessage(NSInvocation *): delegate (webView:decidePolicyForNavigationAction:request:frame:decisionListener:) failed to return after waiting 10 seconds. main run loop mode: kCFRunLoopDefaultMode

以上是错误信心，在webview进行loadrequest时候发生