Here is the error when I try to login from my app.
MyApp[47747:907] Failed to log in Error Domain=com.facebook.sdk Code=2
"The operation couldn’t be completed. (com.facebook.sdk error 2.)"
UserInfo=0x1c5d3c50 {com.facebook.sdk:ErrorLoginFailedReason=com.facebook.sdk:SystemLoginCancelled, com.facebook.sdk:ErrorInnerErrorKey=Error Domain=com.apple.accounts Code=7
"The Facebook server could not fulfill this access request: Invalid application [My_App_Id]"
UserInfo=0x1c5cb630 {NSLocalizedDescription=The Facebook server could not fulfill this access request: Invalid application [My_App_Id]}, com.facebook.sdk:ErrorSessionKey=<FBSession: 0x1c584800, state: FBSessionStateClosedLoginFailed, loginHandler: 0x0, appID: 589037374454169, urlSchemeSuffix: , tokenCachingStrategy:<PFFacebookTokenCachingStrategy: 0x1d0818a0>, expirationDate: (null), refreshDate: (null), attemptedRefreshDate: 0001-12-30 00:00:00 +0000, permissions:(null)>}
On another iPhone the authorization works without problems. I checked that on both devices, My App is enabled for Facebook native auth.
Any ideas?
Ok, my mistake. I was trying with my friend's Facebook account and he was not identified as a developer on Facebook.
Once I disabled the Sandbox mode for my app, login worked without problems.
Obviously, as said above, you could disable the sandbox mode for your app, or you could add your friend as a developer on Facebook @developer.facebook.com (if you need).
来源：https://stackoverflow.com/questions/16085249/invalid-application-id-with-facebook-ios-application