iOS 9 is more secure about downloading from the internet, and you often have to disable that security to download images.
In the info.plist file, you can use
NSAllowsArbitraryLoads to completely disable ATS in your app:
Right-Click info.plist and Open As -> Source Code. This will open the file in XML format.
<key>NSAppTransportSecurity</key> <dict> <key>NSAllowsArbitraryLoads</key><true/> </dict>
Note where it is in the context of the rest of the xml file.