FBSDK工作完美，但登录后查看重新加载应用程序崩溃

时间：2013-02-15 11:11:37

标签： iphone ios facebook facebook-graph-api fbconnect

我已经实施了Facebook SDK 3.0。以下代码工作正常，但仅当用户登录Facebook 时才会出现错误：

重现错误：

  1. 用户通过fbView.m类登录并可以发布状态
  2. 用户按导航栏返回按钮 - ＆gt;已加载DetailViewController
  3. 按下loadFB按钮返回FbView
  4. APP仅在用户登录Facebook时才会崩溃
    5.   

    有人知道这个问题的解决方案吗？也许与登录缓存有关？...有人吗？

    -(void)loadFB{

NSLog(@"test");


FbView *f = [[[FbView alloc] initWithNibName:@"FbView" bundle:[NSBundle mainBundle]]retain];
f.RSstatus =  self.titleDV;
f.RSpostURL = self.postURL;

// Pass the selected object to the new view controller.
[self.navigationController pushViewController:FbView animated:YES];
[FbView release];

    } 

        //  FbView.m
#import "FbView.h"
#import "DetailViewController.h"
#import "AppDelegate.h"

@interface FbView () <FBLoginViewDelegate>


@property (strong, nonatomic) IBOutlet FBProfilePictureView *profilePic;
@property (strong, nonatomic) IBOutlet UIButton *buttonPostStatus;
@property (strong, nonatomic) IBOutlet UIButton *buttonPostPhoto;
@property (strong, nonatomic) IBOutlet UIButton *buttonPickFriends;
@property (strong, nonatomic) IBOutlet UIButton *buttonPickPlace;
@property (strong, nonatomic) IBOutlet UILabel *labelFirstName;
@property (strong, nonatomic) id<FBGraphUser> loggedInUser;

- (IBAction)postStatusUpdateClick:(UIButton *)sender;
- (IBAction)postPhotoClick:(UIButton *)sender;
- (IBAction)pickFriendsClick:(UIButton *)sender;
- (IBAction)pickPlaceClick:(UIButton *)sender;

- (void)showAlert:(NSString *)message
           result:(id)result
            error:(NSError *)error;


@end

@implementation FbView

@synthesize buttonPostStatus = _buttonPostStatus;
@synthesize buttonPostPhoto = _buttonPostPhoto;
@synthesize buttonPickFriends = _buttonPickFriends;
@synthesize buttonPickPlace = _buttonPickPlace;
@synthesize labelFirstName = _labelFirstName;
@synthesize loggedInUser = _loggedInUser;
@synthesize profilePic = _profilePic;
@synthesize RSstatus,RSpostURL;


- (void)viewWillDisappear:(BOOL)animated
{
        [FBSession.activeSession close];  
    [super viewWillDisappear:animated];
}

- (void)viewDidDisappear:(BOOL)animated
{
        [FBSession.activeSession close];  
    [super viewDidDisappear:animated];
}

- (void)viewDidLoad {    
    [super viewDidLoad];


    // Create Login View so that the app will be granted "status_update" permission.
    FBLoginView *loginview = 
    [[FBLoginView alloc] initWithPermissions:[NSArray arrayWithObject:@"status_update"]];

    loginview.frame = CGRectOffset(loginview.frame, 5, 5);
    loginview.delegate = self;

    [self.view addSubview:loginview];

    [loginview sizeToFit];

    [self check];
}



-(void)check{


    AppDelegate *del=[[AppDelegate alloc]init];

    if(!FBSession.activeSession == nil){

        NSLog(@"%@",FBSession.activeSession );
    } else {


        NSLog(@"nee");



    }

}


- (void)viewDidUnload {
    self.buttonPickFriends = nil;
    self.buttonPickPlace = nil;
    self.buttonPostPhoto = nil;
    self.buttonPostStatus = nil;
    self.labelFirstName = nil;
    self.loggedInUser = nil;
    self.profilePic = nil; 
    [super viewDidUnload];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
        return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
    } else {
        return YES;
    }
}

- (void)loginViewShowingLoggedInUser:(FBLoginView *)loginView {
    // first get the buttons set for login mode
    self.buttonPostPhoto.enabled = YES;
    self.buttonPostStatus.enabled = YES;
    self.buttonPickFriends.enabled = YES;
    self.buttonPickPlace.enabled = YES;
}

- (void)loginViewFetchedUserInfo:(FBLoginView *)loginView
                            user:(id<FBGraphUser>)user {
    // here we use helper properties of FBGraphUser to dot-through to first_name and
    // id properties of the json response from the server; alternatively we could use
    // NSDictionary methods such as objectForKey to get values from the my json object
    self.labelFirstName.text = [NSString stringWithFormat:@"Hello %@!", user.first_name];
    // setting the profileID property of the FBProfilePictureView instance
    // causes the control to fetch and display the profile picture for the user
    self.profilePic.profileID = user.id;
    self.loggedInUser = user;
}

- (void)loginViewShowingLoggedOutUser:(FBLoginView *)loginView {
    self.buttonPostPhoto.enabled = NO;
    self.buttonPostStatus.enabled = NO;
    self.buttonPickFriends.enabled = NO;
    self.buttonPickPlace.enabled = NO;

    self.profilePic.profileID = nil;            
    self.labelFirstName.text = nil;
}

// Post Status Update button handler
- (IBAction)postStatusUpdateClick:(UIButton *)sender {

    // Post a status update to the user's feed via the Graph API, and display an alert view 
    // with the results or an error.





    NSString *message = [NSString stringWithFormat:@"%@ \n%@",RSstatus,RSpostURL];

    [FBRequestConnection startForPostStatusUpdate:message
                                completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {

                                  [self showAlert:message result:result error:error];
                                    self.buttonPostStatus.enabled = YES;
                                }];

    self.buttonPostStatus.enabled = NO;       
}

// Post Photo button handler
- (IBAction)postPhotoClick:(UIButton *)sender {

    // Just use the icon image from the application itself.  A real app would have a more 
    // useful way to get an image.
    UIImage *img = [UIImage imageNamed:@"Icon-72@2x.png"];

    [FBRequestConnection startForUploadPhoto:img 
                           completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
                               [self showAlert:@"Photo Post" result:result error:error];
                               self.buttonPostPhoto.enabled = YES;
                           }];

    self.buttonPostPhoto.enabled = NO;
}

// Pick Friends button handler
- (IBAction)pickFriendsClick:(UIButton *)sender {
    FBFriendPickerViewController *friendPickerController = [[FBFriendPickerViewController alloc] init];
    friendPickerController.title = @"Pick Friends";
    [friendPickerController loadData];

    // Use the modal wrapper method to display the picker.
    [friendPickerController presentModallyFromViewController:self animated:YES handler:
     ^(FBViewController *sender, BOOL donePressed) {
         if (!donePressed) {
             return;
         }
         NSString *message;

         if (friendPickerController.selection.count == 0) {
             message = @"<No Friends Selected>";
         } else {

             NSMutableString *text = [[NSMutableString alloc] init];

             // we pick up the users from the selection, and create a string that we use to update the text view
             // at the bottom of the display; note that self.selection is a property inherited from our base class
             for (id<FBGraphUser> user in friendPickerController.selection) {
                 if ([text length]) {
                     [text appendString:@", "];
                 }
                 [text appendString:user.name];
             }
             message = text;
         }

         [[[UIAlertView alloc] initWithTitle:@"You Picked:" 
                                     message:message 
                                    delegate:nil 
                           cancelButtonTitle:@"OK" 
                           otherButtonTitles:nil] 
          show];
     }];
}

// Pick Place button handler
//- (IBAction)pickPlaceClick:(UIButton *)sender {
//    FBPlacePickerViewController *placePickerController = [[FBPlacePickerViewController alloc] init];
//    placePickerController.title = @"Pick a Seattle Place";
//    placePickerController.locationCoordinate = CLLocationCoordinate2DMake(47.6097, -122.3331);
//    [placePickerController loadData];
//    
//    // Use the modal wrapper method to display the picker.
//    [placePickerController presentModallyFromViewController:self animated:YES handler:
//     ^(FBViewController *sender, BOOL donePressed) {
//         if (!donePressed) {
//             return;
//         }
//       
//         [[[UIAlertView alloc] initWithTitle:@"You Picked:" 
//                                     message:placePickerController.selection.name 
//                                    delegate:nil 
//                           cancelButtonTitle:@"OK" 
//                           otherButtonTitles:nil] 
//          show];
//     }];
//}

// UIAlertView helper for post buttons
- (void)showAlert:(NSString *)message
           result:(id)result
            error:(NSError *)error {

    NSString *alertMsg;
    NSString *alertTitle;
    if (error) {
        alertMsg = error.localizedDescription;
        alertTitle = @"Error";
    } else {
        NSDictionary *resultDict = (NSDictionary *)result;
        alertMsg = [NSString stringWithFormat:@"Successfully posted '%@'.\nPost ID: %@", 
                    message, [resultDict valueForKey:@"id"]];
        alertTitle = @"Success";
    }

    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:alertTitle
                                                        message:alertMsg
                                                       delegate:nil
                                              cancelButtonTitle:@"OK"
                                              otherButtonTitles:nil];
    [alertView show];
}




@end

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0 个答案:

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