如何重新加载UIViewController [英] How to reload UIViewController

问题描述

我想重新加载tabbar控制器（UIViewController）中包含的所有视图。搜索后我发现我要应用setNeedsDisplay方法，但我无法在哪里应用它。还欢迎其他任何替代方案

I want to reload all the views contained in tabbar controller(UIViewController).After searching I found that I've to apply setNeedsDisplay Method but I am not able to get where should I apply it.Any other alternatives are also welcomed

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    .....
    .....

    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    [self customToolbar];
    [self.window addSubview:tabBarController.view];
    [self.window makeKeyAndVisible];    
    return YES;
}
-(void)customToolbar
{
    //Declared view controllers and their Navigation Controller
    .....

    //Declared tab bar items
    .....    

    tabBarController = [[GTabBar alloc] initWithTabViewControllers:viewControllersArray tabItems:tabItemsArray initialTab:1];
}

推荐答案

正确的方法将要作为观察者刷新的任何VC添加到某个NSNotificationCenter通知名称。一旦VC获得此消息，只需调用一个调用 [self setNeedsDisplay] 的选择器。

The correct way to do this would be to add any VC that needs to be refreshed as an observer to a certain NSNotificationCenter notification name. Once the VC gets this message, just call a selector that calls [self setNeedsDisplay].

添加VC到NSNotificationCenter：

To add a VC to NSNotificationCenter:

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

别忘了拨打 removeObserver：self 取消分配视图控制器时。

Don't forget to call removeObserver:self when the view controller is deallocated.

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