Open Radar

 
Summary:
If user is not signed in,
1. visiting http://photo.weibo.com/h5/comment/compic_id/1022:2305972009eadb8261e2a58c6dbf57d7d33641 redirects to
2. http://passport.weibo.com/visitor/visitor which redirects to
3. http://weibo.com/login.php which redirects to
4. http://www.weibo.com/login.php which finally redirects to
5. http://login.sina.com.cn/plugin_proxy.html, where user can sign in.

WKWebView stops at step 2.

Steps to Reproduce:
1. Run sample app.
2. Wait 20 seconds for the loading to finish.
3. See the blank page.
4. Read console logs to see the final URL is that of step 2 in summary.
5. Comment line 17~18 and uncomment line 20~22 of ViewController.swift to switch to use UIWebView.
6. Restart sample app.
7. Wait 20 seconds for the loading to finish.
8. See the sign-in page.
9. Read console logs to see the final URL is that of step 5 in summary.

Sample code:
http://cl.ly/0f2m3N1Q161e