Connecting/Publishing to Facebook with FBConnect W

问题:

I have implemented FBConnect into my iPhone App, and it works perfectly on the Simulator (v4.3). However, when I test the the same code on my iPhone (v4.3.3), it appears as though my Facebook Button now exits out of my application and opens the Facebook App. The Facebook App displays a page saying I have already authorized my app, and that I should press "Okay" to continue. At first I did not think this was necessarily indicative of a problem, but when I hit the Okay button, I am simply returned to my appViewController where I clicked on my Facebook Button in the beginning.

What I expected, and what occurs correctly in my simulator, is that a smaller Facebook subview window would appear in my application view after clicking the Facebook Button, and I would be given the option to publish to my Facebook Wall.

I should mention, that I have successfully been able to run the "DemoApp" (facebook-ios-sdk test program) on my iPhone. Also, my app does not crash and no errors are reported in my debugger console window.

Why am I experiencing such different results when running the application on my iPhone? Has anyone else experienced a similar problem? What can I do to fix it?

Thanks in advance, Jeremy

回答1:

Have you had a look at the "Authentication and Authorization" section at https://github.com/facebook/facebook-ios-sdk?

The difference between the simulator and your device is that your device has the Facebook app installed. If you didn't have the app installed, I'm guessing it would work perfectly because the authorization callbacks are handled directly within the app. However, with the Facebook app installed, after the user authenticates your app, the Facebook app "redirects" to your app using a URL handler.

It is your job to implement the correct URL handling code by setting up your plist property (which you appear to have done since your app relaunches after the Facebook app authorizes you), and also to respond correctly to the - (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url app delegate message. The details to implement this launch handler correctly should be listed in the link above.