我的解决方案是取消导航并再次使用loadRequest：加载请求。这将是类似于UIWebView的行为，它始终在当前帧中打开新窗口。

My solution is to cancel the navigation and load the request with loadRequest: again. This will be come the similar behavior like UIWebView which always open new window in the current frame.

首先，您需要实现 WKUIDelegate 。并将其设置为 _webview.UIDelegate 。然后实现：

First you need to have an implementation of WKUIDelegate. And set it to _webview.UIDelegate. Then implement:

- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures
{

  if (!navigationAction.targetFrame.isMainFrame) {

    [webView loadRequest:navigationAction.request];
  }

  return nil;
}