WKPreferences *preferences = [[WKPreferences alloc] init];
preferences.javaScriptEnabled = YES;
WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
configuration.preferences = preferences;
WKWebView *webView = [[WKWebView alloc] initWithFrame:CGRectZero configuration:configuration];
webView.navigationDelegate = self;
NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
[urlRequest setValue:@"Safari" forHTTPHeaderField:@"User-agent"];
[webView loadRequest:urlRequest];

我正在尝试加载的网址是：

https://www.google.com/search?q=mustang

未调用以下WKNavigationDelegate方法：

- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation
{
    [webView evaluateJavaScript:@"document.getElementsByTagName('html')[0].outerHTML" completionHandler:^(id result,NSError *error) {
        NSLog(@"Result %@",result);
    }];
}

我的NSObject类符合WKNavigationDelegate协议.

我还需要做点什么吗？

非常感谢任何帮助.