如何更改选中和未选中的标签栏图像颜色

Question

我正在尝试更改 iOS 应用程序中标签栏项目的颜色。

子视图控制器嵌入在导航控制器中。

我在 AppDelegate 中添加了这段代码，它只是改变了文本的颜色。

 [UITabBarItem.appearance setTitleTextAttributes:
 @{NSForegroundColorAttributeName : [UIColor colorWithRed:38/255.0 green:54/255.0 blue:73/255.0 alpha:1.0]}
                                       forState:UIControlStateNormal];

 [UITabBarItem.appearance setTitleTextAttributes:@{NSForegroundColorAttributeName : kColorTabbarNavigationBarTint}
                                       forState:UIControlStateSelected];

在图像资源中，如果我将特定图像渲染为原始图像，它可以工作，但选择颜色不适用于图像。

请告诉我可以做什么。

提前谢谢...

Answer 1

试试下面的代码：当你想以编程方式设置时。

// get your TabBarController
//UITabBarController *tabBarController = self.tabBarController
UITabBarController *tabBarController = (UITabBarController *)self.window.rootViewController; 
UITabBar *tabBar = tabBarController.tabBar;

UITabBarItem *tabItem1 = [tabBar.items objectAtIndex:0];
[tabItem1 setSelectedImage:[UIImage imageNamed:@"selectimg"]];
tabItem1.selectedImage = [[UIImage imageNamed:@"selectimg"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];
tabItem1.image = [[UIImage imageNamed:@"deselectimg"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];
tabItem1.title = @"xxxx";

UITabBarItem *tabItem2 = [tabBar.items objectAtIndex:1];
tabItem2.selectedImage = [[UIImage imageNamed:@"selectimg"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];
tabItem2.image = [[UIImage imageNamed:@"deselectimg"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];
tabItem2.title = @"xxxx";

UITabBarItem *tabItem3 = [tabBar.items objectAtIndex:2];
tabItem3.selectedImage = [[UIImage imageNamed:@"selectimg"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];
tabItem3.image = [[UIImage imageNamed:@"deselectimg"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];
tabItem3.title = @"xxxx";

UITabBarItem *tabItem4 = [tabBar.items objectAtIndex:3];
tabItem4.selectedImage = [[UIImage imageNamed:@"selectimg"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];
tabItem4.image = [[UIImage imageNamed:@"deselectimg"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];
tabItem4.title = @"xxxx";

或者您可以在情节提要中设置它，选择特定的选项卡项目并见下文