Iphone 带有自定义初始化数据的xcode pushviewcontroller

我正在从as推viewControllerB

    if(!self.controller2){

                self.controller2 = [[viewControllerB alloc] initWithNibName:@"viewControllerB" bundle:nil anUser:self.idUser aidioma:self.idioma];
            }

    [[self navigationController] pushViewController:self.controller2 animated:NO];

然后，我将B弹出到A。现在需要再次按下A，但再次初始化B或调用B上的函数，以便传递新的变量。以下选项可能有效，但我没有成功

释放controller2并=nil，但若由于controller2仍处于活动状态而未执行语句，则释放controller2并=nil

调用viewControllerB上的函数，以便在不初始化的情况下传递新PAR，但未调用该函数

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我做错了什么？谢谢。

尝试使用适当描述它的

NSNotificationCenter

在类A中使用此代码viewDidLoad：

[[NSNotificationCenter defaultCenter] addObserver:self
        selector:@selector(receiveTestNotification:) 
        name:@"TestNotification"
        object:nil];

在B类pop函数中使用以下代码

 [[NSNotificationCenter defaultCenter] 
        postNotificationName:@"TestNotification" 
        object:self];

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下面的代码确保每次从A->B->A（通过导航控制器的后退按钮）->B导航时，每次都会调用B的init方法（我在这里使用ARC…如果没有，请告诉我，我将编辑示例）：

AppDelegate:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.

    viewControllerA *vcA = [[viewControllerA alloc] initWithNibName:@"viewControllerA" bundle:nil];
    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vcA];
    self.window.rootViewController = nav;
    [self.window makeKeyAndVisible];
    return YES;
}

- (IBAction)moveForward:(id)sender {
    // change this line to call your custom init method.
    viewControllerB *vc = [[viewControllerB alloc] initWithNibName:@"viewControllerB" bundle:nil];
    [self.navigationController pushViewController:vc animated:YES];
}

viewControllerA的按钮操作方法：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.

    viewControllerA *vcA = [[viewControllerA alloc] initWithNibName:@"viewControllerA" bundle:nil];
    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vcA];
    self.window.rootViewController = nav;
    [self.window makeKeyAndVisible];
    return YES;
}

- (IBAction)moveForward:(id)sender {
    // change this line to call your custom init method.
    viewControllerB *vc = [[viewControllerB alloc] initWithNibName:@"viewControllerB" bundle:nil];
    [self.navigationController pushViewController:vc animated:YES];
}