Since I upgraded my existing project with iOS 9, I keep getting the error :
An SSL error has occurred and a secure connection to the server cannot be made.
For the iOS9, Apple made a radical decision with iOS 9, disabling all unsecured HTTP traffic from iOS apps, as a part of App Transport Security (ATS).
To simply disable ATS, you can follow this steps by open Info.plist, and add the following lines:
<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsArbitraryLoads</key>
<true/>
</dict>