修改WKWebView背景色

把控制器视图背景色设置为WKWebView背景色,然后隐藏WKWebView

 _webView.scrollView.backgroundColor = [UIColor KZP_MainColor];
 _webView.backgroundColor = [UIColor KZP_MainColor];
_webView.hidden = YES;//在创建的时候直接先隐藏

#pragma mark - WKNavigationDelegate
//在开始加载WKWebVie添加一个加载框
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation{
    [GiFHUD showInView:self.view GIF:LOADING];
}
//网页加载完成 延时0.2秒展示网页
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation{
    [webView evaluateJavaScript:@"document.body.style.backgroundColor="#141A26"" completionHandler:nil];
     [self performSelector:@selector(showWebView) withObject:self afterDelay:0.2];
}

- (void)webView:(WKWebView *)webView didFailNavigation:(WKNavigation *)navigation withError:(NSError *)error{
    [GiFHUD dismiss];
}

- (void)showWebView{
    self.webView.hidden = NO;
    [GiFHUD dismiss];
}