wkwebview.m

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler
{
    WKNavigationActionPolicy policy = WKNavigationActionPolicyAllow;
    
    BOOL isFragmentJump = NO;
    if (navigationAction.request.URL.fragment) {
        NSString *nonFragmentURL = [navigationAction.request.URL wm_nonFragmentURLString];
        isFragmentJump = [nonFragmentURL isEqualToString:webView.URL.absoluteString];
    }
    
    if (!isFragmentJump) {
        BOOL should = [_webViewDelegate wmWebView:self shouldStartLoadWithRequest:navigationAction.request];
        if (!should) {
            decisionHandler(WKNavigationActionPolicyCancel);
            return;
        }
    }
    
    if ((policy == WKNavigationActionPolicyAllow) && !isFragmentJump && [navigationAction.request.URL wm_isHTTPOrFileURL]) {
        _lastRequest = [navigationAction.request mutableCopy];
    }
    
    decisionHandler(policy);
}