iOS：为什么自定义选项卡栏项目仅显示为灰色轮廓？

我正在尝试使用自定义的*.png文件（一个用于选定文件，一个用于未选定文件）设置UITabBarController的选项卡栏图标

所有图像均为非交错png格式，并在*.imageset中正确命名（@2x、@3x等）

但选项卡栏项目仅显示为如下轮廓：

UIImage *selectedImage;
UIImage *unselectedImage;

// tab1
selectedImage = [UIImage imageNamed:@"cmdGamesActive"];
unselectedImage = [UIImage imageNamed:@"cmdGamesInactive"];
UITabBarItem *item1 = [self.tabBar.items objectAtIndex:0];
item1 = [item1 initWithTitle:@"Games" image:unselectedImage selectedImage:selectedImage];

// tab2
selectedImage = [UIImage imageNamed:@"cmdFriendsActive"];
unselectedImage = [UIImage imageNamed:@"cmdFriendsInactive"];
UITabBarItem *item2 = [self.tabBar.items objectAtIndex:1];
item2 = [item2 initWithTitle:@"Friends" image:unselectedImage selectedImage:selectedImage];

// tab3
selectedImage = [UIImage imageNamed:@"cmdTrophiesActive"];
unselectedImage = [UIImage imageNamed:@"cmdTrophiesInactive"];
UITabBarItem *item3 = [self.tabBar.items objectAtIndex:2];
item3 = [item3 initWithTitle:@"Trophies" image:unselectedImage selectedImage:selectedImage];

// tab4
selectedImage = [UIImage imageNamed:@"cmdSettingsActive"];
unselectedImage = [UIImage imageNamed:@"cmdSettingsInactive"];
UITabBarItem *item4 = [self.tabBar.items objectAtIndex:3];
item4 = [item4 initWithTitle:@"Settings" image:unselectedImage selectedImage:selectedImage];

我试图在Interface Builder中设置这些图像，但没有成功。然后，我还尝试在MyTabBarController（扩展UITabBarController）的“loadView”函数中以编程方式设置它们，如下所示：

UIImage *selectedImage;
UIImage *unselectedImage;

// tab1
selectedImage = [UIImage imageNamed:@"cmdGamesActive"];
unselectedImage = [UIImage imageNamed:@"cmdGamesInactive"];
UITabBarItem *item1 = [self.tabBar.items objectAtIndex:0];
item1 = [item1 initWithTitle:@"Games" image:unselectedImage selectedImage:selectedImage];

// tab2
selectedImage = [UIImage imageNamed:@"cmdFriendsActive"];
unselectedImage = [UIImage imageNamed:@"cmdFriendsInactive"];
UITabBarItem *item2 = [self.tabBar.items objectAtIndex:1];
item2 = [item2 initWithTitle:@"Friends" image:unselectedImage selectedImage:selectedImage];

// tab3
selectedImage = [UIImage imageNamed:@"cmdTrophiesActive"];
unselectedImage = [UIImage imageNamed:@"cmdTrophiesInactive"];
UITabBarItem *item3 = [self.tabBar.items objectAtIndex:2];
item3 = [item3 initWithTitle:@"Trophies" image:unselectedImage selectedImage:selectedImage];

// tab4
selectedImage = [UIImage imageNamed:@"cmdSettingsActive"];
unselectedImage = [UIImage imageNamed:@"cmdSettingsInactive"];
UITabBarItem *item4 = [self.tabBar.items objectAtIndex:3];
item4 = [item4 initWithTitle:@"Settings" image:unselectedImage selectedImage:selectedImage];

。。。同样的结果

如何解决这个问题有什么想法吗？

根据，我做了一些额外的事情，并在这里为您提供了答案。我有我的自定义UITabBarController，它在情节提要文件中与我的UITabBarController链接。因此，为了在未选中TabBar时删除iOS提供的自动着色，我最终以这种方式删除了它。这些图像可以是各种各样的图像，但只是在途中。下面是：

NSArray *navConArr = self.viewControllers;//self is custom UITabBarController
UINavigationController *naviOne = [navConArr objectAtIndex:0];//I have 3 different tabs, objectAtIndex:0 means the first tab navigation controller
UITabBarItem *naviBtn  = naviOne.tabBarItem;
UIImage *image = [[UIImage imageNamed:@"iconNaviOne"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
[naviBtn setSelectedImage:image];
[naviBtn setImage:image];

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谢天谢地，这就像一个符咒（：

这应该可以做到：

UITabBarItem *item0 = [_tabBar.items objectAtIndex:0];
item0.image  = [[UIImage imageNamed:@"edit_profile_tab"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
item0.selectedImage  = [[UIImage imageNamed:@"edit_profile_tab_active"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

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我也面临着类似的问题。 我为我的标签选择了几个图标，如“麦克风”、“笑脸”和“设置”

但当我执行程序时，唯一能看到的东西是灰色和蓝色的方块

我修改了我的“.png”图像，使之透明，现在它们可以像预期的那样可见

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i、 e，确保用于选项卡图标的图像没有背景。

完成图像名称，最后尝试添加.png。@Samraan Khaan:谢谢，但这没有帮助。有趣的是，它与另一个仅具有透明度和一些白色的图像一起工作。但我的图标非常丰富多彩……还有其他想法吗？@CookieMensta:看起来不错就像新的iOS SDK不可能那样…只支持在选中时着色的黑白图像。啊，嘘！感谢您的更新：）@cookiemonsta:查看此线程。它描述了选项卡栏项的一个非常类似的问题。