TabBarItem图标不会立即出现在ios 8中

Question

我有tabBarItem icon的问题.这是我的故事板的一部分的屏幕截图.

有一个基本的viewController与一些按钮.当其中一个按钮被触摸时,会出现一个带有三个选项卡的tabBarController.在iOS 8中,tabBarItems的图标最初不会出现.如果我更改了视图控制器,则会出现上一个和当前视图控制器的图标.如果我选​​择第三个选项卡,则会出现tabBarItems的所有图标.这是我的问题的屏幕截图:

TabBarController的第一个外观:

如果我改变标签:

这是我用来将tabBarItems的图标(所有图标都是30x30)设置为TabBarController的第一个viewController的viewDidLoad方法的代码:

[[[self.tabBarController.viewControllers objectAtIndex:0] tabBarItem]  setFinishedSelectedImage:[UIImage imageNamed:@"1d1.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"1b1.png"]];

[[[self.tabBarController.viewControllers objectAtIndex:1] tabBarItem]  setFinishedSelectedImage:[UIImage imageNamed:@"2d1.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"2b1.png"]];

[[[self.tabBarController.viewControllers objectAtIndex:2] tabBarItem]  setFinishedSelectedImage:[UIImage imageNamed:@"3d1.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"3b1.png"]];

以下是适用于iOS 7的屏幕截图:

谁能帮我这个？？

Answer 1

经过几个小时的搜索和阅读不同的答案,包括@ Zala的答案,这部分代码进入了TabBarController的第一个viewController的viewDidLoad,并最终起作用.

 if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
{

    UITabBarItem *tabBarItem = [self.tabBarController.tabBar.items objectAtIndex:0];

    UIImage *unselectedImage = [UIImage imageNamed:@"1b1.png"];
    UIImage *selectedImage = [UIImage imageNamed:@"1d1.png"];

    [tabBarItem setImage: [unselectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
    [tabBarItem setSelectedImage:[selectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];


    UITabBarItem *tabBarItem1 = [self.tabBarController.tabBar.items objectAtIndex:1];

    UIImage *unselectedImage1 = [UIImage imageNamed:@"2b1.png"];
    UIImage *selectedImage1 = [UIImage imageNamed:@"2d1.png"];

    [tabBarItem1 setImage: [unselectedImage1 imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
    [tabBarItem1 setSelectedImage: [selectedImage1 imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];

    UITabBarItem *tabBarItem2 = [self.tabBarController.tabBar.items objectAtIndex:2];

    UIImage *unselectedImage2 = [UIImage imageNamed:@"3b1.png"];
    UIImage *selectedImage2 = [UIImage imageNamed:@"3d1.png"];

    [tabBarItem2 setImage: [unselectedImage2 imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
    [tabBarItem2 setSelectedImage:[selectedImage2 imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];


    [tabBarItem setTitle:@"???????????"];

    [tabBarItem2 setTitle:@"360° ??????????"];

    [tabBarItem1 setTitle:@"??????"];



}
else
{


    [[[self.tabBarController.viewControllers objectAtIndex:0] tabBarItem]  setFinishedSelectedImage:[UIImage imageNamed:@"1d1.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"1b1.png"]];


    [[[self.tabBarController.viewControllers objectAtIndex:1] tabBarItem]  setFinishedSelectedImage:[UIImage imageNamed:@"2d1.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"2b1.png"]];
    [[[self.tabBarController.viewControllers objectAtIndex:2] tabBarItem]  setFinishedSelectedImage:[UIImage imageNamed:@"3d1.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"3b1.png"]];

    [[[self.tabBarController.viewControllers objectAtIndex:0] tabBarItem] setTitle:@"???????????"];

    [[[self.tabBarController.viewControllers objectAtIndex:2] tabBarItem] setTitle:@"360° ??????????"];

    [[[self.tabBarController.viewControllers objectAtIndex:1] tabBarItem] setTitle:@"??????"];



}

Answer 2

setFinishedSelectedImage:withFinishedUnselectedImage:从iOS 7使用image和selectedImage属性中弃用UITabBarItem.

要设置自定义图像:

UITabBarItem *tabBarItem1 = [tabBar.items objectAtIndex:0];

if ([self iOS7OrAbove])
{
    //use UIImageRenderingModeAlwaysOriginal to set the custom image for ios 7 and above.
    tabBarItem1.selectedImage = [[UIImage imageNamed:@"SelectedImage"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    tabBarItem1.image = [[UIImage imageNamed:@"UnselectedImage"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
}
else
{
    [tabBarItem1 setFinishedSelectedImage:[UIImage imageNamed:@"SelectedImage"] withFinishedUnselectedImage:[UIImage imageNamed:@"UnselectedImage"]];
}

希望这很好.

即使setFinishedSelectedImage:withFinishedUnselectedImage:在iOS7中被弃用,它在iOS7中也能正常工作,但在8中却没有.