选择 tabBarController 的索引并传递数据

Question

我想在向其传递数据时选择 tabbarcontroller 索引 0 处的 UIViewController。看来我正在访问 UINavigationController。有谁知道为什么会出现这种情况？

SearchViewController *search = (SearchViewController *)[self.tabBarController.viewControllers objectAtIndex:0];
[search initWithText:@"This is a test"];

[[self.tabBarController.viewControllers objectAtIndex:1] pushViewController:search animated:NO];

// 还可以使用以下方法接收错误：

self.tabBarController.selectedViewController = search;

Error:

-[UINavigationController initWithText:]: unrecognized selector sent to instance 

Answer 1

哇，现在我觉得自己很傻。这有效。

UINavigationController *navController = [self.tabBarController.viewControllers objectAtIndex:0];
SearchViewController *search = [navController.viewControllers objectAtIndex:0];
[search initWithText:@"This is a test"];
self.tabBarController.selectedViewController = navController;