iPhone simulator cannot connect to internet

I had the same problem with Xcode 6.2 and iOS 8.2 Simulator. The response field was nil. I tried reseting the simulator, cleaning the product in Xcode, restarting both, restarting the Computer, turning wifi off and on and changing for a different wifi network. Nothing worked. Finally I disabled the Avast Antivirus Shields and it worked.

1.Turn off lan connection;
2.Turn on wifi;
3.In the iOS Simulator > Settings > Developer > Allow HTTP Services (turn on);
4.Restart Xcode and simulator.

iOS Simulator (menu, top left) > Reset Content and Settings... fixed it for me. Note this will delete all the apps and associated data you have on the simulator.