WKWebView的WKUIDelegate

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

当一个URL里面包含_blank的跳转链接时, 需要在此代理方法里面做一些处理,

-(WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures{
    NSLog(@"进入UI");
    WKNavigationType tpye = navigationAction.navigationType;
  //navigationAction.request为即将加载的请求
    NSURLRequest *que = navigationAction.request;
  //sourceFrame一般为主isMainFrame, 且sourceInfo.request.URL一般是主窗口加载的第一个URL
    WKFrameInfo *sourceInfo = navigationAction.sourceFrame;

    NSLog(@"WKNavigationType = %ld \n que.URL = %@",tpye,que.URL);

    NSLog(@"sourceInfoRequest = %@ \n mainFrame = %d",sourceInfo.request.URL,sourceInfo.isMainFrame);

    WKFrameInfo *frameInfo = navigationAction.targetFrame;
    NSLog(@"frameInfo = %@ \n mainFrame = %d",frameInfo.request.URL,frameInfo.isMainFrame);
    if (![frameInfo isMainFrame]) {
        [webView loadRequest:navigationAction.request];
    }
    return nil;
}