如何刷新UITableView后应用程序变得活跃？ [英] How to refresh UITableView after app comes becomes active again?

问题描述

在用户退出应用程序后，如果我的应用程序再次处于活动状态，我希望我的UITableView reloadData 。我知道我需要实现（在我的应用程序委托）：

- （void）applicationDidBecomeActive：（UIApplication *）application

但不知道如何引用当前的UITableView？

更新：
UITableView是一个单独的控制器。它实际上如下所示：

  AppDelegate>根视图控制器>以Ole的形式按下具有UITableViewController的UITabBarController 
  

解决方案

  [[NSNotificationCenter defaultCenter] addObserver：self 
 selector：@selector（becomeActive :) 
 name：UIApplicationDidBecomeActiveNotification 
 object：nil]; 
  

在控制器中添加实际方法

   - （void）becomeActive：（NSNotification *）notification {
 NSLog（@become active）; 
} 
  

请务必清除通知

   - （void）dealloc {
 [[NSNotificationCenter defaultCenter] removeObserver：self]; 
 [super dealloc] 
} 
  

I would like my UITableView to reloadData once my app is active again, after a user exits the application. I know I need to implement (in my app delegate):

- (void)applicationDidBecomeActive:(UIApplication *)application

but im not sure how to reference the current UITableView?

UPDATE: My UITableView is a separate controller. It is actually presented as follows

AppDelegate > Root View Controller > Pushes UITabBarController modally which has a UITableViewController

解决方案

following up on Ole's answer above

add this when initializing the viewcontroller

[[NSNotificationCenter defaultCenter] addObserver:self 
    selector:@selector(becomeActive:)
    name:UIApplicationDidBecomeActiveNotification
    object:nil];

add the actual method in the controller

- (void)becomeActive:(NSNotification *)notification {
    NSLog(@"becoming active");
}

be sure to clean up the notification

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    [super dealloc];
}

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