如何使用FBSDKLoginManager實現使用FB進行登錄？

Question

雖然使用這種方法
([login logInWithReadPermissions:@[@"email"] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error)

總是得到的結果isCancelled到YES。並獲得AccessToken作爲null

Answer 1

添加以下行applicationDidFinishLaunching

return [[FBSDKApplicationDelegate sharedInstance] application:application 
            didFinishLaunchingWithOptions:launchOptions]; 

和AppDelegate.m

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation { 
    return [[FBSDKApplicationDelegate sharedInstance] application:application 
                  openURL:url 
               sourceApplication:sourceApplication 
                 annotation:annotation]; 
} 

信用添加這個方法去FBSDKLoginManager logInWithPublishPermissions always returns isCancelled=YES