在Swift中更改UITabBarItem上的selectedImage [英] Changing selectedImage on UITabBarItem in Swift

问题描述

我一直在尝试更改UITabBar上的所选图像。我已经按照其他Stackoverflow问题列出的程序，但似乎没有任何工作。

I've been trying to change the selected image on a UITabBar. I've followed procedures listed on other Stackoverflow questions, but nothing seems to work.

我尝试通过用户定义的运行时属性部分设置图像，以及尝试过将以下内容添加到AppDelegate.swift：

I have tried setting the image through the User Defined Runtime Attributes section, as well as tried adding the following to AppDelegate.swift:

var tabBarController = self.window!.rootViewController as UITabBarController
let tabItems = tabBarController.tabBar.items as [UITabBarItem]

var selectedImage0 = UIImage(named:"NewsfeedTabSelected")
selectedImage0?.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
tabItems[0].selectedImage = selectedImage0

这不会产生任何结果。我做了一个 println（tabItems [0] .title）并输出了正确的标题，所以我知道对TabBarItem的引用是有效的。

This doesn't yield any results. I did a println(tabItems[0].title) and that output the correct title, so I know that the reference to the TabBarItem is working.

有什么想法？

推荐答案

我在AppDelegate上使用类似的东西解决了。

I solved using something like this on the AppDelegate.

var tabBarController = self.window!.rootViewController as UITabBarController
var tabBar = tabBarController.tabBar as UITabBar

var tabBarItem1 = tabBar.items![0] as UITabBarItem
var tabBarItem2 = tabBar.items![1] as UITabBarItem
var tabBarItem3 = tabBar.items![2] as UITabBarItem

tabBarItem1.selectedImage = UIImage(named: "FirstSelectedImage")
tabBarItem2.selectedImage = UIImage(named: "SecondSelectedImage")
tabBarItem3.selectedImage = UIImage(named: "ThirdSelectedImage")

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