Question

缩略语

在我的应用中:didFinishLaunching WithOptions 我的摘录如下。

UIViewController *viewController1 = [[WSWFirstViewController alloc] initWithNibName:@"WSWFirstViewController" bundle:nil];
UIViewController *viewController2 = [[WSWSecondViewController alloc] initWithNibName:@"WSWSecondViewController" bundle:nil];
self.tabBarController = [[TabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, viewController2, nil];

self.window.rootViewController = self.tabBarController;

[self.tabBarController showSplash];

[viewController1 displayItems];

What I m trying to do is access the displayItems property of the viewController1 object which is of the type WSWFirstViewController.

In WSWFirstViewController.h I have

@property (retain, nonatomic) NSMutableArray *displayItems;

In WSWFirstViewController.m 我有@syntheize showItems。

I can t seem to figure out why I get a:

财产展览未找到的物项

直到我注意到我的反对(Controller1)是“IDViewController” * 的编号,但WSWFirstViewController *。但是,这仍然无助于我。

任何建议都值得赞赏。

Answer 1

You should refer your controllers by their proper type:

 WSWFirstViewController *viewController1 = [[WSWFirstViewController alloc] initWithNibName:@"WSWFirstViewController" bundle:nil];
 WSWSecondViewController *viewController2 = [[WSWSecondViewController alloc] initWithNibName:@"WSWSecondViewController" bundle:nil];

 ....

 [viewController1 displayItems];  // this will now work if you are in the same context

Answer 2

你们是否在Suntable Array显示器中申报?

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