[iOS]wkwebview获取h5的手机号输入框并填充

在以下方法中调用

//页面加载完成之后调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation;

//方法1
//NSString *jsCode  =[NSString stringWithFormat:@"var a = document.getElementsByTagName('input');for(var i=0;i<a.length;i++){var placeholder = a[i].getAttribute('placeholder');if (placeholder.indexOf('手机号') > -1) {a[i].value = '%@'}}",@"123456"];
//方法2    
NSString *jsCode  = [NSString stringWithFormat:@"document.querySelector('input[placeholder*=\"手机号\"]').value = %@;",@"123456"];

 [self.webView evaluateJavaScript:doc
                completionHandler:^(id _Nullable htmlStr, NSError *_Nullable error){

                       if (error) {
                           NSLog(@"JSError:%@", error);
                       }
                       else
                       {
                          NSLog(@"已执行");
                       }
                   }];