How to pass facebook info through protocols ios - ios

Question

I have watched tutorials and what I have learnt, that I have implemented on a project with two viewControllers just a simple firstName, lastName practice but I don't know where to place the method setFirstName: in a facebook project that I'm doing I wish to login (that works) then it automatically goes to another viewController (that works) I just cant get the user.name to be displayed, in which facebook delegate do i call the method, I fetch the info here and place it in the property in the loginViewController
- (void)loginViewFetchedUserInfo:(FBLoginView *)loginView user:(id<FBGraphUser>)user
{
firstName = user.name;
[[self delegate] setFirstName:firstName];
}
then in the profileViewController I place this:
- (void)setFirstName:(NSString *)firstName
{
firstNameString = firstName;
}
then i assign the properties here
-(void)viewWillAppear:(BOOL)animated
{
self.firstNameLabel.text = firstNameString;
}
i think my issue is when I'm pushing to the profileViewController I'm not passing the info in the transition cause i don't use a segue I'm just pushing the viewController please help been on this issue for a week or so thanks
EDIT::
LoginViewController.m
// this method will be called when the user information has been fetched
- (void)loginViewFetchedUserInfo:(FBLoginView *)loginView user:(id<FBGraphUser>)user
{
self.profilePictureView.profileID = user.id;
FBNamePass = user.name;
}
- (void)pushViewController
{
NeXtViewController *controller = [[NeXtViewController alloc] init];
controller.FBNameString = FBNamePass;
[self.navigationController pushViewController:controller animated:YES];
}
EDIT 2::
LoginViewController.h
#import <UIKit/UIKit.h>
#import <FacebookSDK/FacebookSDK.h>
#protocol passNames <NSObject>
- (void)setFBName: (NSString *)FBName;
#end
#interface ViewController : UIViewController <FBLoginViewDelegate>
#property (retain) id <passNames> delegate;
#property (strong, nonatomic) NSString *FBNamePass;
#end
LoginViewController.m
#import "ViewController.h"
#import "NeXtViewController.h"
#interface ViewController ()
#property (strong, nonatomic) IBOutlet UILabel *statusLabel;
#property (strong, nonatomic) IBOutlet UILabel *nameLabel;
#property (strong, nonatomic) IBOutlet FBProfilePictureView *profilePictureView;
#end
#implementation ViewController
#synthesize delegate, FBNamePass;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
// Create a FBLoginView to log the user in with basic, email and likes permissions
// you should always ask for basic permissions when loggin the user in
FBLoginView *loginView = [[FBLoginView alloc] initWithReadPermissions:#[#"basic_info",#"email",#"user_likes"]];
// set this loginUIViewCOntroller to be the loginView button's delegate
loginView.delegate = self;
// align the button in the center horizontally
loginView.frame = CGRectMake(25, 299, 271, 50);
// align the button in the center vertically
//loginView.center = self.view.center;
// add the button to the view
[self.view addSubview:loginView];
[self pushViewController];
}
-(void)viewDidAppear:(BOOL)animated
{
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
// this method will be called when the user information has been fetched
- (void)loginViewFetchedUserInfo:(FBLoginView *)loginView user:(id<FBGraphUser>)user
{
self.profilePictureView.profileID = user.id;
FBNamePass = user.name;
}
// implement the loginViewShowingLoggedInUser: delegate method to modify your app's UI for a logged-in user experoience
- (void)loginViewShowingLoggedInUser:(FBLoginView *)loginView
{
self.statusLabel.text = #"Logged in";
if ([self.statusLabel.text isEqualToString:#"Logged in"]) {
NeXtViewController *n = [self.storyboard instantiateViewControllerWithIdentifier:#"NeXt"];
[self.navigationController pushViewController:n animated:NO];
}
}
// implement the loginViewShowingLoggedOutUser: delegate method to modify your app's UI for a logged-out user experoience
- (void)loginViewShowingLoggedOutUser:(FBLoginView *)loginView
{
self.profilePictureView.profileID = nil;
self.nameLabel.text = #"";
self.statusLabel.text = #"You're not logged in";
}
// You need to override loginView:handleError in order to handle possible errors that can occur during login
- (void)loginView:(FBLoginView *)loginView handleError:(NSError *)error
{
NSString *alertMessage, *alertTitle;
// If the user should perform an action outside of you app to recover,
// the SDK will provide a message for the user, you just need to surface it.
// This conveniently handles cases like Facebook password change or unverified Facebook accounts.
if ([FBErrorUtility shouldNotifyUserForError:error]) {
alertMessage = [FBErrorUtility userMessageForError:error];
alertTitle = #"Facebook Error";
// This code will handle session closures since that happen outside of the app.
// You can take a look at our error handling guide to know more about it
// https://developers.facebook.com/docs/ios/errors
} else if ([FBErrorUtility errorCategoryForError:error] == FBErrorCategoryAuthenticationReopenSession) {
alertTitle = #"Session Error";
alertMessage = #"Your current session is no longer valid. Please log in again.";
// If the user has cancelled a login, we will do nothing.
// You can also choose to show the user a message if cancelling login will result in
// the user not being able to complete a task they had initiated in your app
// (like accessing FB-stored information or posting to Facebook)
} else if ([FBErrorUtility errorCategoryForError:error] == FBErrorCategoryUserCancelled) {
NSLog(#"user cancelled login");
// For simplicity, this sample handles other errors with a generic message
// You can checkout our error handling guide for more detailed information
// https://developers.facebook.com/docs/ios/errors
} 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];
}
}
- (void)pushViewController
{
NeXtViewController *controller = [[NeXtViewController alloc] init];
controller.FBNameString = FBNamePass;
[self.navigationController pushViewController:controller animated:YES];
}
ProfileViewController.h
#import <UIKit/UIKit.h>
#import <FacebookSDK/FacebookSDK.h>
#import "ViewController.h"
#interface NeXtViewController : UIViewController <passNames>
{
ViewController *view;
}
#property (strong,nonatomic) NSString *FBNameString;
#property (weak, nonatomic) IBOutlet UILabel *nameLabel;
#end
ProfileViewController.m
#import "NeXtViewController.h"
#interface NeXtViewController ()
#end
#implementation NeXtViewController
#synthesize FBNameString;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
view = [[ViewController alloc] init];
[view setDelegate:self];
self.nameLabel.text = FBNameString;
self.navigationItem.hidesBackButton = YES;
}
-(void)viewDidAppear:(BOOL)animated
{
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)setFBName:(NSString *)FBName
{
FBNameString = FBName;
}
#end

Answer 1

You need create property in ProfileViewController -> create instance of ProfileViewController -> set user name to instance property -> push instance of ProfileViewController:
LoginViewController.m
- (void)pushProfileViewController {
ProfileViewController *controller = [[ProfileViewController alloc] init];
controller.firstName = firstNameString;
[self.navigationController pushViewController:controller animated:YES];
}