iOS 12 WKWebView 键盘bug处理

链接地址

/**
 * observer notification when keyboard will hide
 */
[[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(keyboardWillHide)
                                                     name:UIKeyboardWillHideNotification
                                                   object:nil];

/////////////--------------------------//////////////
/*
 *Description: this method was trigger by selector keyboarwillhide from notification
 */
-(void)keyboardWillHide
{
    if (@available(iOS 12.0, *)) {
        WKWebView *webview = (WKWebView*)self.webView;
         for(UIView* v in webview.subviews){
              if([v isKindOfClass:NSClassFromString(@"WKScrollView")]){
                      UIScrollView *scrollView = (UIScrollView*)v;
                      [scrollView setContentOffset:CGPointMake(0, 0)];
              }
          }
     }
}