oc和js交互

-(void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
    NSString *strURL = [NSString stringWithFormat:@"%@",navigationAction.request.URL];
    NSLog(@"%@-------",strURL);
    
    if ([strURL hasSuffix:@"方法名字"]) {
        decisionHandler(WKNavigationActionPolicyCancel);
              return;
    }
    
    decisionHandler(WKNavigationActionPolicyAllow);
}