Iphone 未选中时设置Abbaricon色调

我正在尝试设置Uitabritem的图标，但它不起作用。顺便说一下，我在这个项目中使用的是Xcode 5 Beta版

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    {
        [[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor], NSForegroundColorAttributeName, nil] forState:UIControlStateNormal];
        UIImage *tabBarBackground = [UIImage imageNamed:@"tabbar.png"];
        [[UITabBar appearance] setBackgroundImage:tabBarBackground];
        [[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageNamed:@"tabbar_selected.png"]];
        [[UITabBar appearance] setTintColor:[UIColor whiteColor]];
    }
    return YES;
}

我试图让图标在选中和未选中时都是白色的，但在未选中状态下它们仍然是灰色的

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编辑 我尝试过这样做，但现在我得到了错误“表达式结果未使用”

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tintColor

设置背景的着色颜色，如果使用自定义背景图像，则无法看到此颜色。如果你不想有系统默认梯度，你必须使用和设置你的白色图像为他们两个

像这样：

UIImage *selectedImage = ...
UIImage *unselectedImage = selectedImage;
[tabBarItem setFinishedSelectedImage:selectedImage withFinishedUnselectedImage:unselectedImage];

如果要在故事板中设置这些图像，则可以迭代现有UITabbaritem并更改其图像

将类似的内容放入

应用程序：didFinishLaunchingWithOptions:

UITabBarController *tabBarController = (UITabBarController *)self.window.rootViewController;
NSAssert([tabBarController isKindOfClass:[UITabBarController class]], @"self.window.rootViewController must be a tabBarController");
for (UIViewController *viewController in tabBarController.viewControllers) {
    UITabBarItem *tabBarItem = viewController.tabBarItem;
    UIImage *tabImage = tabBarItem.image;
    [tabBarItem setFinishedSelectedImage:tabImage withFinishedUnselectedImage:tabImage];
}

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我通过故事板设置图像。因此，我没有每个tabBarItem的名称。您无法从故事板设置完成的图像，因此您必须向应用程序代理添加一些代码。请参见编辑。这是他们的一种使用方法吗<代码>initWithTitle:（NSString*）@“title”图像：（UIImage*）[UIImage ImageName:@“sample image”]选择图像：（UIImage*）[UIImage ImageName:@“sample image”]您的方法在ios 7中已被弃用

UITabBarController *tabBarController = (UITabBarController *)self.window.rootViewController;
NSAssert([tabBarController isKindOfClass:[UITabBarController class]], @"self.window.rootViewController must be a tabBarController");
for (UIViewController *viewController in tabBarController.viewControllers) {
    UITabBarItem *tabBarItem = viewController.tabBarItem;
    UIImage *tabImage = tabBarItem.image;
    [tabBarItem setFinishedSelectedImage:tabImage withFinishedUnselectedImage:tabImage];
}