ios中wkWebview加载异常

APP中有一个h5页面突然无法加载 ，断点后打印
The certificate for this server is invalid. You might be connecting to a server that is pretending to be “*****” which could put your confidential information at risk.
此服务器的证书无效。您可能正在连接到假装为“****”的服务器，这可能会使您的机密信息面临风险。
其实这个问题 换成https就好了，奈何条件不允许。
最终解决方案添加下方代码

• (void)webView:(WKWebView *)webView didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *credential))completionHandler {
  NSLog(@“Allowing all”);
  SecTrustRef serverTrust = challenge.protectionSpace.serverTrust;
  CFDataRef exceptions = SecTrustCopyExceptions (serverTrust);
  SecTrustSetExceptions (serverTrust, exceptions);
  CFRelease (exceptions);
  completionHandler (NSURLSessionAuthChallengeUseCredential, [NSURLCredential credentialForTrust:serverTrust]);
  }