The new ATS involved by iOS 9 cause lots of http related functionalities stop working. I have to add all the http request url into a whitelist or I could simply disable the ATS by setting
Thanks for everyone's answer.
The good news is Apple
Accepted my app with
NSAllowsArbitraryLoads set to
UPDATE (Thanks @Vijayts): Apple will reject Apps not conforming to ATS after the end of Dec 2016.
However, If you need to load a http:// resource only in web (UIWebView/WKWebView/SafariViewController) then the following should suffice.
<key>NSAppTransportSecurity</key> <dict> <key>NSAllowsArbitraryLoadsInWebContent</key> <true/> </dict>