xcode 如何重新加载 UIViewController
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How to reload UIViewController
提问by Shubham Sharma
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
我想重新加载 tabbar 控制器（UIViewController）中包含的所有视图。搜索后我发现我必须应用 setNeedsDisplay 方法，但我无法找到我应该在哪里应用它。也欢迎任何其他替代方案
- (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];
}
采纳答案by Stavash
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].
执行此操作的正确方法是将需要作为观察者刷新的任何 VC 添加到某个 NSNotificationCenter 通知名称。VC 收到此消息后，只需调用一个选择器即可[self setNeedsDisplay]。
To add a VC to NSNotificationCenter:
将 VC 添加到 NSNotificationCenter：
[[NSNotificationCenter defaultCenter] addObserver:self selector: @selector(setNeedsDisplay) name:@"ViewControllerShouldReloadNotification" object:nil];
Don't forget to call removeObserver:selfwhen the view controller is deallocated.
不要忘记removeObserver:self在视图控制器被释放时调用。
