With iOS 9 you can't call an HTTP anymore because the ATS (App Transport Security) calls should be HTTPS. To work with HTTP links, you should insert the following key in the info.plist file to disable the ATS:
NSAppTransportSecurity
NSAllowsArbitraryLoads
create a new voice in the info.plist file "NSAppTransportSecurity" like dict.
insert in it the key "NSAllowsArbitraryLoads" like boolean and set to YES
;-)