ios - Facebook 登录后更改 View Controller

Question

下面列出了我的 View Controller ，用于处理 Facebook 登录。现在，应用程序运行并加载具有 Facebook 登录按钮的 View 。登录后，按钮会将文本更改为“注销”。我希望发生的是，一旦用户登录，它就会转到另一个 View Controller 。

我在 Storyboard中添加了一个新的 View Controller ，并在两者之间进行了“segue”，但我觉得我错过了一些东西。如果有帮助的话，我制作的新 View Controller 被命名为“homeViewController”。谢谢

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.loginView.readPermissions = @[@"public_profile", @"email", @"user_friends"];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)loginViewFetchedUserInfo:(FBLoginView *)loginView user:(id<FBGraphUser>)user
{
    NSLog(@"%@", user.name);
}

- (void)loginViewShowingLoggedInUser:(FBLoginView *)loginView
{
    NSLog(@"You are logged in! :) ");
}

- (void)loginViewShowingLoggedOutUser:(FBLoginView *)loginView
{
    NSLog(@"You are logged out! :( ");
}

- (void)loginView:(FBLoginView *)loginView handleError:(NSError *)error
{
    NSString *alertMessage, *alertTitle;

    if ([FBErrorUtility shouldNotifyUserForError:error])
    {
        alertTitle = @"Facebook error";
        alertMessage = [FBErrorUtility userMessageForError:error];

    }
    else if ([FBErrorUtility errorCategoryForError:error] == FBErrorCategoryAuthenticationReopenSession)
    {
        alertTitle = @"Session Error";
        alertMessage = @"Your current session is no longer valid. Please log in again.";

    }
    else if ([FBErrorUtility errorCategoryForError:error] == FBErrorCategoryUserCancelled)
    {
        NSLog(@"user cancelled login");

    }
    else
    {
        alertTitle  = @"Something went wrong";
        alertMessage = @"Please try again later.";
        NSLog(@"Unexpected error:%@", error);
    }

    if (alertMessage)
    {
        [[[UIAlertView alloc] initWithTitle:alertTitle
                                    message:alertMessage
                                   delegate:nil
                          cancelButtonTitle:@"OK"
                          otherButtonTitles:nil] show];
    }
}

@end

Answer 1

只要将 Segue 附加到 Facebook 登录按钮，它就应该是您所需要的。

如果你愿意，可以打电话

- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender {
    if(currentUser ) { //this checks that the user logged in before moving to the next view
     return YES;
    }
    else return NO;
}

在移动到 homeViewController 之前检查用户是否成功登录。 你会做类似上面代码的事情