JS_OC_WebViewJavascriptBridge[3263:316698] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Completion handler passed to -[WKWebViewJavascriptBridge webView:decidePolicyForNavigationAction:decisionHandler:] was called more than once'

[liyuunxiangGit]

这段代码报错：
`

• (void)webView:(WKWebView *)webView
  decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction
  decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
  if (webView != _webView) { return; }
  NSURL *url = navigationAction.request.URL;
  __strong typeof(_webViewDelegate) strongDelegate = _webViewDelegate;

  if ([_base isCorrectProcotocolScheme:url]) {
  if ([_base isBridgeLoadedURL:url]) {
  [_base injectJavascriptFile];
  } else if ([_base isQueueMessageURL:url]) {
  [self WKFlushMessageQueue];
  } else {
  [_base logUnkownMessage:url];
  }
  decisionHandler(WKNavigationActionPolicyCancel);
  }

  if (strongDelegate && [strongDelegate respondsToSelector:@selector(webView:decidePolicyForNavigationAction:decisionHandler:)]) {
  [_webViewDelegate webView:webView decidePolicyForNavigationAction:navigationAction decisionHandler:decisionHandler];
  } else {
  decisionHandler(WKNavigationActionPolicyAllow);
  }
  }
  `

可以修改为：
`- (void)webView:(WKWebView *)webView
decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction
decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
if (webView != _webView) { return; }
NSURL *url = navigationAction.request.URL;
__strong typeof(_webViewDelegate) strongDelegate = _webViewDelegate;

if ([_base isCorrectProcotocolScheme:url]) {
    if ([_base isBridgeLoadedURL:url]) {
        [_base injectJavascriptFile];
    } else if ([_base isQueueMessageURL:url]) {
        [self WKFlushMessageQueue];
    } else {
        [_base logUnkownMessage:url];
    }
    decisionHandler(WKNavigationActionPolicyCancel);
}else
{
    if (strongDelegate && [strongDelegate respondsToSelector:@selector(webView:decidePolicyForNavigationAction:decisionHandler:)]) {
        [_webViewDelegate webView:webView decidePolicyForNavigationAction:navigationAction decisionHandler:decisionHandler];
    } else {
        decisionHandler(WKNavigationActionPolicyAllow);
    }
}

}`