[英]Changing tab bar item image and text color iOS
这是我的标签栏:
下图显示了正在运行的程序和选中的“NEWS”项:
很明显,条形色调颜色可以正常工作,如我所愿!
但 tintColor 只影响图像而不影响文本。
Also, when the an item is selected (as seen above, news) the item color goes blue? 我该如何防止这种情况发生。 我希望它保持白色。
为什么文本在选中时变为白色,而在取消选中时却没有?
我基本上希望项目颜色和文本颜色始终为白色。
我如何实现这一目标? 谢谢你的帮助。
每件商品是否都需要 swift 代码?
编辑:
来自 UITabBarItem 类文档:
默认情况下,实际未选择和已选择的图像是根据源图像中的 alpha 值自动创建的。 为防止系统着色,请使用 UIImageRenderingModeAlwaysOriginal 提供图像。
线索不在于你是否使用 UIImageRenderingModeAlwaysOriginal,重要的是何时使用它。
为了防止未选中项目的灰色,您只需要防止未选中图像的系统着色。 以下是如何执行此操作:
var firstViewController:UIViewController = UIViewController()
// The following statement is what you need
var customTabBarItem:UITabBarItem = UITabBarItem(title: nil, image: UIImage(named: "YOUR_IMAGE_NAME")?.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal), selectedImage: UIImage(named: "YOUR_IMAGE_NAME"))
firstViewController.tabBarItem = customTabBarItem
如您所见,我要求 iOS 仅将图像的原始颜色(白色、黄色、红色等)应用于 UNSELECTED 状态,而将图像保留为 SELECTED 状态。
此外,您可能需要为选项卡栏添加色调,以便为 SELECTED 状态应用不同的颜色(而不是默认的 iOS 蓝色)。 根据上面的屏幕截图,您正在为所选状态应用白色:
self.tabBar.tintColor = UIColor.whiteColor()
编辑:
斯威夫特 3
我通过创建一个自定义标签栏控制器并将此代码添加到viewDidLoad
方法中来做到这一点。
if let count = self.tabBar.items?.count {
for i in 0...(count-1) {
let imageNameForSelectedState = arrayOfImageNameForSelectedState[i]
let imageNameForUnselectedState = arrayOfImageNameForUnselectedState[i]
self.tabBar.items?[i].selectedImage = UIImage(named: imageNameForSelectedState)?.withRenderingMode(.alwaysOriginal)
self.tabBar.items?[i].image = UIImage(named: imageNameForUnselectedState)?.withRenderingMode(.alwaysOriginal)
}
}
let selectedColor = UIColor(red: 246.0/255.0, green: 155.0/255.0, blue: 13.0/255.0, alpha: 1.0)
let unselectedColor = UIColor(red: 16.0/255.0, green: 224.0/255.0, blue: 223.0/255.0, alpha: 1.0)
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: unselectedColor], for: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: selectedColor], for: .selected)
它对我有用!
对于图像:
custom.tabBarItem = UITabBarItem(title: "Home", image: UIImage(named: "tab_icon_normal"), selectedImage: UIImage(named: "tab_icon_selected"))
对于文本:
UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.gray], for: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.red], for: .selected)
对我有用的解决方案:
这将阻止标签栏组件设置其默认图像色调。
文本- 在这里我创建了一个简单的 UITabBarController 子类,并在它的 viewDidLoad 方法中自定义了默认和选定的文本颜色,如下所示:
class HomeTabBarController: UITabBarController { override func viewDidLoad() { super.viewDidLoad() let appearance = UITabBarItem.appearance(whenContainedInInstancesOf: [HomeTabBarController.self]) appearance.setTitleTextAttributes([NSAttributedStringKey.foregroundColor: .black], for: .normal) appearance.setTitleTextAttributes([NSAttributedStringKey.foregroundColor: .red], for: .selected) } }
只需在 IB 的身份检查器中将此类设置为您的 Tab bar 控制器自定义类。
瞧! 就是这样。
iOS 13 更新:
将此添加到您的 iOS 13 设置中:
if #available(iOS 13, *) {
let appearance = UITabBarAppearance()
appearance.stackedLayoutAppearance.selected.titleTextAttributes = [NSAttributedString.Key.foregroundColor: .red]
tabBar.standardAppearance = appearance
}
Swift 4:在您的 UITabBarController 中通过此代码更改它
tabBar.unselectedItemTintColor = .black
斯威夫特 3
这对我有用(指的是设置 tabBarItems 图像颜色):
UITabBar.appearance().tintColor = ThemeColor.Blue
if let items = tabBarController.tabBar.items {
let tabBarImages = getTabBarImages() // tabBarImages: [UIImage]
for i in 0..<items.count {
let tabBarItem = items[i]
let tabBarImage = tabBarImages[i]
tabBarItem.image = tabBarImage.withRenderingMode(.alwaysOriginal)
tabBarItem.selectedImage = tabBarImage
}
}
我注意到,如果您使用渲染模式 = .alwaysOriginal 设置图像,则 UITabBar.tintColor 没有任何效果。
首先,确保您已将 BOOLEAN 键“View controller-based status bar appearance”添加到 Info.plist,并将值设置为“NO”。
Appdelegate.swift
在“launchOptions:[UIApplicationLaunchOptionsKey: Any]?) -> Bool {”之后的某处插入代码
UITabBar.appearance().barTintColor = UIColor(red: 0.145, green: 0.592, blue: 0.804, alpha: 1.00)
或默认 UI 颜色之一:
UITabBar.appearance().barTintColor = UIColor.white)
所选项目
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.white], for: .selected)
非活动项目
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.black], for: .normal)
如果您不是从头开始制作图标,那么在 Photoshop 中制作交替的黑白版本相对容易。
Adobe Photoshop(几乎任何版本都可以)
确保您的图标图像具有透明背景,并且图标本身是纯黑色(或关闭)。
打开图像文件,将其保存在不同的文件名下(例如 exampleFilename-Inverted.png)
在“图像”菜单上的“调整”子菜单中:
点击“反转”
您现在拥有原始图标的底片。
在 XCode 中,在情节提要的 Tab Bar Properties 下将其中一张图像设置为“Selected Image”,并在“Bar Item”图像下指定“inactive”版本。
达达🍺
我知道这里有很多答案,但我找不到Swift 4.2/Swift 5.1的简单有效的复制/粘贴答案
tabBarController?.tabBar.tintColor = UIColor.red
tabBarController?.tabBar.unselectedItemTintColor = UIColor.green
或者像这样使用UITabBar.appearances()
而不是tabBarController?.tabBar
:
UITabBar.appearances().tintColor = UIColor.red
UITabBar.appearances().unselectedItemTintColor = UIColor.green
尝试将其添加到AppDelegate.swift (在应用程序方法中):
UITabBar.appearance().tintColor = UIColor(red: 0/255.0, green: 0/255.0, blue: 0/255.0, alpha: 1.0)
// For WHITE color:
UITabBar.appearance().tintColor = UIColor(red: 255/255.0, green: 255/255.0, blue: 255/255.0, alpha: 1.0)
例子:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Tab bar icon selected color
UITabBar.appearance().tintColor = UIColor(red: 0/255.0, green: 0/255.0, blue: 0/255.0, alpha: 1.0)
// For WHITE color: UITabBar.appearance().tintColor = UIColor(red: 255/255.0, green: 255/255.0, blue: 255/255.0, alpha: 1.0)
return true
}
例子:
我的英语太差了! 抱歉! :-)
斯威夫特 3.0
我创建了标签栏类文件并编写了以下代码
在viewDidLoad
:
self.tabBar.barTintColor = UIColor.white
self.tabBar.isTranslucent = true
let selectedColor = UIColor.red
let unselectedColor = UIColor.cyan
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: unselectedColor,NSFontAttributeName: UIFont(name: "Gotham-Book", size: 10)!], for: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: selectedColor,NSFontAttributeName: UIFont(name: "Gotham-Book", size: 10)!], for: .selected)
if let items = self.tabBar.items {
for item in items {
if let image = item.image {
item.image = image.withRenderingMode( .alwaysOriginal )
item.selectedImage = UIImage(named: "(Imagename)-a")?.withRenderingMode(.alwaysOriginal)
}
}
}
在viewDidLoad
之后:
override func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {
if(item.title! == "title")
{
item.selectedImage = UIImage(named: "(Imagname)-a")?.withRenderingMode(.alwaysOriginal)
}
if(item.title! == "title")
{
item.selectedImage = UIImage(named: "(Imagname)-a")?.withRenderingMode(.alwaysOriginal)
}
if(item.title! == "title")
{
item.selectedImage = UIImage(named: "(Imagname)-a")?.withRenderingMode(.alwaysOriginal)
}
if(item.title! == "title")
{
item.selectedImage = UIImage(named: "(Imagname)-a")?.withRenderingMode(.alwaysOriginal)
}
if(item.title! == "title")
{
item.selectedImage = UIImage(named: "(Imagname)-a")?.withRenderingMode(.alwaysOriginal)
}
}
在视图确实加载方法中,您必须设置所选图像,其他图像使用 RenderingMode 显示,在选项卡栏委托方法中,您根据标题设置所选图像
对于Swift 4.0 ,它现在更改为:
tabBarItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.gray], for: .normal)
tabBarItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.blue], for: .selected)
如果您的要求只是更改文本颜色,则不必对 UITabBarItem 进行子类化。 只需将上面的代码放在视图控制器的viewDidLoad
函数中。
对于全局设置,将tabBarItem
更改为UITabBarItem.appearance()
。
在 Swift 4.2 中:
UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.white], for: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.red], for: .selected)
您可以设置 UIBarItem 的 tintColor :
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.magentaColor()], forState:.Normal)
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.redColor()], forState:.Selected)
在Swift 5 ios 13.2 中,TabBar 样式发生了变化,下面的代码工作 100%,经过测试。
在您的UITabBarController类中添加以下代码。
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
let appearance = UITabBarAppearance()
appearance.backgroundColor = .white
setTabBarItemColors(appearance.stackedLayoutAppearance)
setTabBarItemColors(appearance.inlineLayoutAppearance)
setTabBarItemColors(appearance.compactInlineLayoutAppearance)
setTabBarItemBadgeAppearance(appearance.stackedLayoutAppearance)
setTabBarItemBadgeAppearance(appearance.inlineLayoutAppearance)
setTabBarItemBadgeAppearance(appearance.compactInlineLayoutAppearance)
tabBar.standardAppearance = appearance
}
@available(iOS 13.0, *)
private func setTabBarItemColors(_ itemAppearance: UITabBarItemAppearance) {
itemAppearance.normal.iconColor = .lightGray
itemAppearance.normal.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.gray]
itemAppearance.selected.iconColor = .white
itemAppearance.selected.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.orange]
}
@available(iOS 13.0, *)
private func setTabBarItemBadgeAppearance(_ itemAppearance: UITabBarItemAppearance) {
//Adjust the badge position as well as set its color
itemAppearance.normal.badgeBackgroundColor = .orange
itemAppearance.normal.badgeTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]
itemAppearance.normal.badgePositionAdjustment = UIOffset(horizontal: 1, vertical: -1)
}
你也可以这样做:
override func viewWillLayoutSubviews() {
if let items = self.tabBar.items {
for item in 0..<items.count {
items[item].image = items[item].image?.withRenderingMode(.alwaysOriginal)
items[item].selectedImage = items[item].selectedImage?.withRenderingMode(.alwaysTemplate)
}
可选的:
UITabBar.appearance().tintColor = UIColor.red
我希望它会帮助你。
如果您想在按下时更改Tab Bar Item
的图像,则此代码适用于Swift 4 。 复制粘贴到项目中命中的第一个viewDidLoad
方法中
let arrayOfImageNameForSelectedState:[String] = ["Image1Color", "Image2Color","Image3Color"]
let arrayOfImageNameForUnselectedState: [String] = ["Image1NoColor","Image2NoColor","Image3NoColor"]
print(self.tabBarController?.tabBar.items?.count)
if let count = self.tabBarController?.tabBar.items?.count {
for i in 0...(count-1) {
let imageNameForSelectedState = arrayOfImageNameForSelectedState[i]
print(imageNameForSelectedState)
let imageNameForUnselectedState = arrayOfImageNameForUnselectedState[i]
print(imageNameForUnselectedState)
self.tabBarController?.tabBar.items?[i].selectedImage = UIImage(named: imageNameForSelectedState)?.withRenderingMode(.alwaysOriginal)
self.tabBarController?.tabBar.items?[i].image = UIImage(named: imageNameForUnselectedState)?.withRenderingMode(.alwaysOriginal)
}
}
//Set Tab bar text/item fonts and size
let fontAttributes = [NSAttributedString.Key.font: UIFont(name: "YourFontName", size: 12.0)!]
UITabBarItem.appearance().setTitleTextAttributes(fontAttributes, for: .normal)
//Set Tab bar text/item color
UITabBar.appearance().tintColor = UIColor.init(named: "YourColorName")
从这里开始。
每个标签栏项目都有一个标题、选定的图像、未选定的图像和一个标记值。
使用图像色调(SelectedImageTintIntColor)字段在选择该选项卡时指定栏项的色彩颜色。 默认情况下,该颜色为蓝色。
斯威夫特 5:
let homeTab = UITabBarItem(title: "Home", image: UIImage(named: "YOUR_IMAGE_NAME_FROM_ASSETS")?.withRenderingMode(UIImage.RenderingMode.alwaysOriginal), tag: 1)
斯威夫特 5.3
let vc = UIViewController()
vc.tabBarItem.title = "sample"
vc.tabBarItem.image = UIImage(imageLiteralResourceName: "image.png").withRenderingMode(.alwaysOriginal)
vc.tabBarItem.selectedImage = UIImage(imageLiteralResourceName: "image.png").withRenderingMode(.alwaysOriginal)
// for text displayed below the tabBar item
UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.black], for: .selected)
只需在项目中添加一个新的 UITabBarController 引用。接下来在这个控制器中创建一个 UITabBar 的引用:
@IBOutlet weak var appTabBar: UITabBar!
在它的viewDidLoad() 中,只需在下面添加标题文本颜色:
appTabBar.tintColor = UIColor.scandidThemeColor()
对于图像
tabBarItem = UITabBarItem(title: "FirstTab", image: UIImage(named: "firstImage"), selectedImage: UIImage(named: "firstSelectedImage"))
子类化您的 TabbarViewController 并在 ViewDidLoad 中放置以下代码:
[UITabBarItem.appearance setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor darkGreyColorBT]} forState:UIControlStateNormal];
[UITabBarItem.appearance setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor nightyDarkColorBT]} forState:UIControlStateSelected];
self.tabBar.items[0].image = [[UIImage imageNamed:@"ic-pack off@3x.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
self.tabBar.items[0].selectedImage = [[UIImage imageNamed:@"ic-pack@3x.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
self.tabBar.items[1].image = [[UIImage imageNamed:@"ic-sleeptracker off@3x.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
self.tabBar.items[1].selectedImage = [[UIImage imageNamed:@"ic-sleeptracker@3x.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
self.tabBar.items[2].image = [[UIImage imageNamed:@"ic-profile off@3x.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
self.tabBar.items[2].selectedImage = [[UIImage imageNamed:@"ic-profile@3x.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
这是我拥有的最简单的工作解决方案
如果您想支持 iOS 13 及以上版本,请尝试此代码,因为设置 UItabBar 的方式与 iOS 13 完全不同。
if #available(iOS 13, *) {
let appearance = UITabBarAppearance()
// appearance.backgroundColor = .white
appearance.shadowImage = UIImage()
appearance.shadowColor = .white
appearance.stackedLayoutAppearance.normal.iconColor = .gray
appearance.stackedLayoutAppearance.normal.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.gray]
// appearance.stackedLayoutAppearance.normal.badgeBackgroundColor = .yellow
appearance.stackedLayoutAppearance.selected.iconColor = .systemPink
appearance.stackedLayoutAppearance.selected.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.systemPink]
// set padding between tabbar item title and image
appearance.stackedLayoutAppearance.selected.titlePositionAdjustment = UIOffset(horizontal: 0, vertical: 4)
appearance.stackedLayoutAppearance.normal.titlePositionAdjustment = UIOffset(horizontal: 0, vertical: 4)
self.tabBar.standardAppearance = appearance
} else {
// set padding between tabbar item title and image
UITabBarItem.appearance().titlePositionAdjustment = UIOffset(horizontal: 0, vertical: 4)
UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.gray], for: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.systemPink], for: .selected)
}
从 Xcode 14/iOS 16 开始,在UITabBarController子类中,您只需设置tabBar的tintColor和unselectedItemTintColor属性:
tabBar.tintColor = 'some UI color'
tabBar.unselectedItemTintColor = 'some UI color'
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