iOS8如何设置TabBarItem图像

Question

iOS8似乎发生了一些变化，现在我的标签栏图标都没有正确显示。大多数情况下，在标签处于活动状态之前，它们不会显示：

但有时他们根本没有露面，只给我一个大蓝盒子（就像我解雇一个覆盖整个窗户的景色一样）：

这是我在iOS8之前所做的：

UITabBarController *tabBarController = (UITabBarController *)self.window.rootViewController;
UITabBar *tabBar = tabBarController.tabBar;
UITabBarItem *tabBarItem1 = [tabBar.items objectAtIndex:0];
[tabBarItem1 setFinishedSelectedImage:[UIImage imageNamed:@"paintbrush-white.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"paintbrush-black.png"]];
tabBarItem1.imageInsets = UIEdgeInsetsMake(6, 0, -6, 0);
tabBarItem1.title = @"";

Answer 1

如上所述，如果你看看：

https://developer.apple.com/Library/ios/documentation/UIKit/Reference/UITabBarItem_Class/index.html#//apple_ref/occ/instm/UITabBarItem/setFinishedSelectedImage:withFinishedUnselectedImage：

您会注意到此方法已弃用，请尝试更改：

[tabBarItem1 setFinishedSelectedImage:[UIImage imageNamed:@"paintbrush-white.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"paintbrush-black.png"]];

为：

[tabBarItem1 setImage:[[UIImage imageNamed:@"paintbrush-white.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
[tabBarItem1 setSelectedImage:[[UIImage imageNamed:@"paintbrush-black.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];

您可能还会遇到图像尺寸问题，具体取决于在iPhone 5屏幕和iPhone 2屏幕上测试@ 2x图像时的图像尺寸

Answer 2

您是否尝试过setSelectedImage：？

UIImage * image = [UIImage imageNamed：@“img.png”] [tabItem setSelectedImage：image];

这对我有用。

Answer 3

此方法在iOS 8中已弃用：

Use initWithTitle:image:selectedImage: or the image and selectedImage properties along with UIImageRenderingModeAlwaysOriginal