WKWebView配置

//加载不受信任的https
- (void)webView:(WKWebView *)webView didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential * _Nullable credential))completionHandler{
    if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {
        NSURLCredential *card = [[NSURLCredential alloc]initWithTrust:challenge.protectionSpace.serverTrust];
        completionHandler(NSURLSessionAuthChallengeUseCredential,card);
    }
}

//允许跨域
WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
[configuration.preferences setValue:@YES forKey:@"allowFileAccessFromFileURLs"];
if (@available(iOS 10.0,*)){
  [configuration setValue:@YES forKey:@"allowUniversalAccessFromFileURLs"];
}