iOS上的Facebook身份验证

Question

iOS beginner here. I am implementing SSO in my iOS app. I've created a Facebook object with

Facebook* facebook = [[Facebook alloc] initWithAppId:appId];
[facebook authorize:permissions delegate:self];

How do I stay logged in after the user closes the app? Do I persist this facebook object in Core Data?

Answer 1

You can also use NSUserDefaults , which is what I have used in the past. You only need to persist the expirationDate and accessToken . Once you restore those into the Facebook object on launch, you can call isSessionValid to determine that validity of both those properties.