带有故事板的presentViewController显示黑色视图iOS 7.1 xcode 5.1

我搜索了SO,但网络上没有找到amy的答案。
我在故事板中创建了名为A的UITableViewController,它有一个简单的按钮。 另一个名为B的ViewController具有webView和关闭按钮。
未以任何形式连接到主UITableViewController A
现在我想打开B视图控制器窗体A,然后用自己的关闭按钮关闭B视图控制器。
但我尝试过的B视图控制器是黑色和空白的。

ViewController B(弹出视图)

#import "TAFBLoginDialogViewController.h"

@interface TAFBLoginDialogViewController ()

@end

@implementation TAFBLoginDialogViewController

-(id)initWithAppId:(NSString *)apiKey
  requestPremision:(NSString *)requestPremision
          delegate:(id<TAFBLoginDialogViewdelegate>)delegate
          storyBoardName:(NSString*) storyBoardName
{
    //self = [super initWithNibName:@"FBLoginDialog" bundle:nil];
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyBoardName bundle:nil];

    UIViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"FBLoginDialog"];
    if (self) {
        // Custom initialization
        self.apiKey = apiKey;
        self.requestPremision = requestPremision;
        self.delegate = delegate;
    }
    return self;
}



- (IBAction)closeTap:(id)sender
{
    [self.delegate closeTaped];
}


-(void)login
{

}
-(void)logout
{


}
-(void)checkForAccessToken:(NSString*)urlString
{

}
-(void)checkLoginRequired:(NSString*)urlString
{
    [self.delegate displayRequired];
}

- (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.
}

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

UITableViewController A(我试图从中打开B的主视图控制器)

#import "TAFMETableViewController.h"


@interface TAFMETableViewController ()
{
}
@end

@implementation TAFMETableViewController

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}
-(void) awakeFromNib
{


    [super awakeFromNib];
}
- (void)viewDidLoad
{
    [super viewDidLoad];

}

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

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
#warning Potentially incomplete method implementation.
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
#warning Incomplete method implementation.

}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

    return cell;
}


- (IBAction)handleOpenFBDialog:(id)sender {
    UIStoryboard * storyboard = self.storyboard;
    NSString * storyboardName = [storyboard valueForKey:@"name"];

    self.appId = @"11111";
    self.permissions =@"public_stream";

    if(_loginDialogView ==nil)
    {
        self.LoginDialogViewController = [[TAFBLoginDialogViewController alloc] initWithAppId:_appId
                                                               requestPremision:_permissions
                                                                delegate:self storyBoardName:storyboardName];
        self.loginDialogView = _LoginDialogViewController.view;
    }

    [self.LoginDialogViewController checkLoginRequired:@"tst"];

    NSLog(@"Click!");
}


-(void)accessTokenFound:(NSString*)accessToken
{
    NSLog(@"accessTokenFound Click!");
}
-(void)displayRequired
{
    NSLog(@"displayRequired Click!");
    [self presentViewController:_LoginDialogViewController animated:YES completion:nil];
}
-(void)closeTaped
{
    NSLog(@"closeTaped Click!");
    [self dismissViewControllerAnimated:NO completion:nil];
}


@end

头文件:

@protocol TAFBLoginDialogViewdelegate

-(void)accessTokenFound:(NSString*)accessToken;
-(void)displayRequired;
-(void)closeTaped;

@end


@interface TAFBLoginDialogViewController : UIViewController<UIWebViewDelegate>
{
    //ivars
//    UIWebView *_webview;
//    NSString* _apiKey;
//    NSString* _requestPremision;
//    id <TAFBLoginDialogViewdelegate> _delegate;
}

@property (retain) IBOutlet UIWebView *webView;
@property (copy) NSString *apiKey;
@property (copy) NSString *requestPremision;
@property (assign) id<TAFBLoginDialogViewdelegate> delegate;

-(id)initWithAppId:(NSString*)apiKey
          requestPremision:(NSString*)requestPremision
          delegate:(id<TAFBLoginDialogViewdelegate>)delegate
          storyBoardName:(NSString*) storyBoardName;

- (IBAction)closeTap:(id)sender;
-(void)login;
-(void)logout;
-(void)checkForAccessToken:(NSString*)urlString;
-(void)checkLoginRequired:(NSString*)urlString;


@end

我在TableView A中有一个按钮可以触发:

- (IBAction)handleOpenFBDialog:(id)sender  

然后该函数初始化ViewController B 以及调用:

[self.LoginDialogViewController checkLoginRequired:@"tst"];

它应该显示ViewController B 但它显示的都是黑屏。