塔巴尔项目图像没有出现

Question

我对塔巴尔项目的图像有问题。我在每个Tabbar项目上设置了一个图像，但是当我运行该应用程序时，出现的唯一图像是第一个Tabbar项目的图像。除非我选择其中一个标签，否则塔巴尔项目的图像不会出现。我用来在塔巴尔项目上设置图像的代码如下：

[self.tabBarItem setImage:[UIImage imageNamed:@"multi30x30.png"]];

[self.tabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"multi30x30.png"]
              withFinishedUnselectedImage:[UIImage imageNamed:@"multi30x30.png"]];

有人能帮我吗？

Answer 1

您可以尝试一下：

[[[self.tabBarController.viewControllers objectAtIndex:0] tabBarItem]setFinishedSelectedImage:[UIImage imageNamed:@"LocateIconActive.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"LocateIconInactive.png"]];

[[[self.tabBarController.viewControllers objectAtIndex:1] tabBarItem]setFinishedSelectedImage:[UIImage imageNamed:@"ProductsIconActive.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"ProductsIconInactive.png"]];

[[[self.tabBarController.viewControllers objectAtIndex:2] tabBarItem]setFinishedSelectedImage:[UIImage imageNamed:@"NextDeliveryIconActive.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"NextDeliveryIconInactive.png"]];

Answer 2

[[tabBarController.tabBar.items objectAtIndex:0] setFinishedSelectedImage:[UIImage imageNamed:@"blabla1.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"bleble1.png"]];
[[tabBarController.tabBar.items objectAtIndex:1] setFinishedSelectedImage:[UIImage imageNamed:@"blabla2.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"bleble2.png"]];
[[tabBarController.tabBar.items objectAtIndex:2] setFinishedSelectedImage:[UIImage imageNamed:@"blabla3.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"bleble3.png"]];

Answer 3

使用此代码： -

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


UITabBarController *tabBarController 
= (UITabBarController 
 *)self.window.rootViewController;

UIImage *selectedImage0 = [UIImage
   imageNamed:@"tb_inorganic_selected"];
UIImage *unselectedImage0 = [UIImage imageNamed:@"tb_inorganic_normal"];

UIImage *selectedImage1 = [UIImage imageNamed:@"tb_organic_selected"];
UIImage *unselectedImage1 = [UIImage imageNamed:@"tb_organic_normal"];

UIImage *selectedImage2 = [UIImage imageNamed:@"tb_acid_selected"];
UIImage *unselectedImage2 = [UIImage imageNamed:@"tb_acid_normal"];



UITabBar *tabBar = tabBarController.tabBar;
UITabBarItem *item0 = [tabBar.items objectAtIndex:0];
UITabBarItem *item1 = [tabBar.items objectAtIndex:1];
UITabBarItem *item2 = [tabBar.items objectAtIndex:2];

[item0 setFinishedSelectedImage:selectedImage0 withFinishedUnselectedImage:unselectedImage0];
[item1 setFinishedSelectedImage:selectedImage1 withFinishedUnselectedImage:unselectedImage1];
[item2 setFinishedSelectedImage:selectedImage2 withFinishedUnselectedImage:unselectedImage2];

Answer 4

使用指定标题，未选择的图像和选定的图像创建并返回一个新项目。如果未提供选定图像，则将图像用作未选择的图像和选定的图像。默认情况下，实际未选择的图像是从源图像中的alpha值自动创建的。为了防止系统着色，请提供图像使用UIImagerEnderingModeAlwaysoriginal。可用性 IOS 7 然后。

UIImage *aImage = [UIImage imageNamed:@"a"]; 
aImage = [aImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

UIImage *inaImage = [UIImage imageNamed:@"ina"];
inaImage = [inaImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

self.aController.tabBarItem = [[UITabBarItem alloc]initWithTitle:@"title" image:inaImage selectedImage:aImage];

Answer 5

我希望ViewController这样做。因此，我认为，最好的解决方案应该是覆盖Init方法，并在此处设置Tabbaritem。

可能您正在ViewDidload中进行此操作，因此只出现第一项。

对不起，拼写错误。

Answer 6

Swift 5.4

  tabBarController?.viewControllers?[index].tabBarItem.image = UIImage(named: "imageName")