zhu zhi issues

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                                            zhu zhi

pod集成的WeexSDK，最新版0.28.0还是包含UIWebView的，请问何时更新pod版本？

Bug

域名异步解析没有回调

![image](https://user-images.githubusercontent.com/1926639/81468411-faea9b80-9211-11ea-9b08-448418a701a3.png) 发现app处于后台时，去调用域名异步解析接口：[MSDKDns WGGetHostByNameAsync: returnIps:] 有时候handler没有回调。有人碰到过吗

这个sdk还会更新吗，目前sdk里面用的还是UIWebview，需要替换成WKWebview

0000000101890f5c t -[WXUIWebViewControll dealloc] 0000000101890db4 t -[WXUIWebViewControll initWithDelegate:] 0000000101890ef8 t -[WXUIWebViewControll refresh:] 0000000101890e08 t -[WXUIWebViewControll viewDidLoad] 0000000101890fc8 t -[WXUIWebViewControll webView:didFailLoadWithError:] 0000000101890fb8 t -[WXUIWebViewControll webView:shouldStartLoadWithRequest:navigationType:] 0000000101890fc4 t -[WXUIWebViewControll webViewDidFinishLoad:] 0000000101890fc0 t...