重新加载/刷新ViewController中的选项卡栏项目? [英] Reload / Refresh tab bar items in a ViewController ?

问题描述

我试图在ViewController中更改标签栏的图像，但是要显示新图像，我必须单击每个标签栏项.

I am trying to change images of my tabbar in a ViewController, but to display the new images, I must click on each tab bar item.

for (CustomTabBarItem *myItem in self.tabBarController.tabBar.items){
        myItem.enabled = YES; 

        myItem.badgeValue = @"1"; 

        UIImage *myImage =  [[UIImage alloc] initWithContentsOfFile:[[DesignManager sharedManager] getPathOfFile:@"test.png"]];

        *myItem.imageSelect= *myImage; // change images of each item. don't appear if I dont click on the item
}

任何人都知道如何直接显示这些图像? 谢谢

Anyone know How can I can display directly these images? Thanks

推荐答案

您需要用新的替换旧的标签栏.否则，您将无法动态更新图像.

You need to replace the old tab bar item with a new one. You can't update the image dynamically otherwise.

最简单的方法是设置由给定选项卡表示的视图控制器的tabBarItem属性.如果您想在该视图控制器中执行此操作，只需编写:

The easiest way to do this is to set the tabBarItem property of the view-controller represented by a given tab. If you wanted to do this from within that view controller, just write:

self.tabBarItem = [[UITabBarItem alloc] initWithTitle: @"title" image: myImage: tag: nil];

或者，您可以从其他地方执行此操作，例如您的应用程序代表:

Or, you could do this from somewhere else, say your app delegate:

UIViewController* vc = [tabBarController.viewControllers objectAtIndex: 3];
vc.tabBarItem = [[UITabBarItem alloc] initWithTitle: @"title" image: myImage: tag: nil];

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