iOS4中的App代理和View Controller [英] App delegate and View Controller in iOS4

问题描述

在iOS4中，使用多任务功能，首页按钮会将应用置于背景中，而当它返回到前台时，我希望View Controller刷新（因此ViewWillAppear被调用）。我把它放在应用程序委托中，认为这应该可以工作，但没有任何反应。

   - （void）applicationDidFinishLaunching：（UIApplication *）application { 
 
 // 
 [window addSubview：viewController.view]; 
 [window makeKeyAndVisible]; 
} 
 
 
  - （void）applicationWillEnterForeground：（UIApplication *）应用程序{
 [viewController.view reloadInputViews]; 
} 
  

任何人都可以帮助我强制视图控制器执行/刷新它已经显示？

解决方案

您可以明确调用viewWillAppear，例如

   - （void）applicationWillEnterForeground：（UIApplication *）application {
 [viewController.view reloadInputViews]; 
 
 [viewController viewWillAppear]; 
} 
  

With multi-tasking in iOS4, the home button puts the app into background and when it comes back into foreground I want the View Controller to 'refresh' (and hence viewWillAppear to be called). I put this in the app delegate thought this should work but nothing happens

 - (void)applicationDidFinishLaunching:(UIApplication *)application {    

    //  
    [window addSubview:viewController.view];
    [window makeKeyAndVisible];
 }


 - (void)applicationWillEnterForeground:(UIApplication *)application {
    [viewController.view reloadInputViews];
 }

Can anyone help me with forcing a view controller to 'execute'/refresh when it is already showing?

解决方案

You could call viewWillAppear explicitly e.g.

- (void)applicationWillEnterForeground:(UIApplication *)application {
    [viewController.view reloadInputViews];

    [viewController viewWillAppear];
 }

这篇关于iOS4中的App代理和View Controller的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！