多對一的UIViewController通信。導航控制器推送視圖。委託或NSNotificationCenter或類方法？

Question

我有一個UIViewController「NavigationViewController」，它是作爲我的「FirstViewController」的子視圖添加的，它佔用了整個屏幕（即類似於iPad應用程序中的Flipboard Navigation控制器）。根據用戶的選擇添加和刪除許多視圖。我希望能夠從添加的「多個視圖」中將視圖控制器推送到「FirstViewController」navigationController。在這種情況下，「FeaturedViewController」是可以選擇的許多視圖之一。它繼承了定義委託協議的ContentViewController。

TL; DR我想要訪問第一個視圖中的導航控制器，以從添加的子視圖「FeaturedViewController」中推送視圖。

這裏是一個可視化表示：

這裏是我的代碼：

這是我當前的嘗試不起作用。請注意，我花了一些代碼了關於該「導航器」

/* First View Controller */ 

#import <UIKit/UIKit.h> 
#import "ContentViewController.h" 

@interface ViewController : UIViewController <BaseViewDelegate, ContentViewDelegate> 
{ 
    IBOutlet UINavigationController *navigationController; 
    ContentViewController *contentView; 
} 

@property (strong, nonatomic) IBOutlet UINavigationController *navigationController; 
@property (strong, nonatomic) ContentViewController *contentView; 

--------------------------------------------------------- 

#import "ViewController.h" 
#import "NavigatorViewController.h" 
#import "BinViewController.h" 

@implementation ViewController 
@synthesize navigationController, contentView; 

static NSArray *viewArray = nil; 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Release any cached data, images, etc that aren't in use. 
} 

#pragma mark - View lifecycle 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
    self.navigationController.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height); 
    [self.view addSubview:navigationController.view]; 

    // Navigation View is used to navigate throughout the entire application 
    NavigatorViewController *navController = [[NavigatorViewController alloc] init]; 

    contentView = [[ContentViewController alloc] init]; 

    contentView.delegate = self; 

    // Add the views to the array (using ARC) 
    viewArray = [NSArray arrayWithObjects:navController, contentView, nil]; 

} 

-(void)displayNavigator 
{ 
    // Get the right view controller  
    UIViewController *viewController = [viewArray objectAtIndex:0]; 
    // Add the subview to the view 
    [self.view addSubview:viewController.view]; 
} 

-(void)pushViewController:(UIViewController *)viewController 
{  
    NSLog(@"First View Push View Controller called"); 

    [self.navigationController pushViewController:viewController animated:YES]; 
} 
@end 

/* Content View Controller */ 

@class ContentViewController; 
@protocol ContentViewDelegate <NSObject> 
-(void)pushViewController:(UIViewController *)viewController; 
@end 

@interface ContentViewController : UIViewController 
{ 
    __weak id <ContentViewDelegate> delegate;  
} 

@property (weak) __weak id <ContentViewDelegate> delegate; 

- (void)pushView:(UIViewController *)viewController; 

@end 

--------------------------------------------------------- 

#import "ContentViewController.h" 
#import "BinViewController.h" 

@implementation ContentViewController 

@synthesize delegate; 

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib. 
- (void)viewDidLoad 
{ 
    [super viewDidLoad];  
} 

- (void)pushView:(UIViewController *)viewController 
{   

    NSLOG(@"Push View from ContentViewController"); 
    if ([delegate respondsToSelector:@selector(pushViewController)]) 
     [delegate pushViewController]; 

} 

@end 

/* View that is added to the navigator view (it inherits ContentViewController where the delegate protocol is defined)*/ 
#import <UIKit/UIKit.h> 
#import "ContentViewController.h" 

@interface FeaturedViewController : ContentViewController <CustomPagingDelegate> 

@end 

--------------------------------------------------------- 

#import "FeaturedViewController.h" 
#import "BinViewController.h" 

@implementation FeaturedViewController 

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib. 
- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

} 

- (void) touchUpInsideItemAtIndex:(NSUInteger)itemIndex 
{ 
    // [[[[[self view] superview] superview] superview] removeFromSuperview]; 
    NSLOG(@"Touch up inside from featured view"); 

    BinViewController *binViewController = [[BinViewController alloc] init]; 

    [self pushView:binViewController];  
} 

@end 

Answer 1

多對一或一對多聽起來像最簡單的途徑是使用NSNotificationCenter。