[英]How to change color for tab bar non selected icon in swift?
How to change color for tab bar non selected icon and text? 如何更改选项卡栏未选中图标和文本的颜色? I found this answer ( How to change inactive icon/text color on tab bar? ), but can't implement it for swift.
我找到了这个答案( 如何更改选项卡栏上非活动图标/文本的颜色? ),但无法快速实现。
iOS 10 iOS 10
class TabBarVC: UITabBarController {
override func viewDidLoad() {
super.viewDidLoad()
// make unselected icons white
self.tabBar.unselectedItemTintColor = UIColor.white
}
}
The below sets the defaults for all UITabBarItem's, you can add it to your AppDelegate
. 下面为所有UITabBarItem设置了默认值,您可以将其添加到您的
AppDelegate
。 It will change your text color. 它将更改您的文本颜色。
UITabBarItem.appearance().setTitleTextAttributes({NSForegroundColorAttributeName: UIColor.blackColor()}, forState:.Selected)
UITabBarItem.appearance().setTitleTextAttributes({NSForegroundColorAttributeName: UIColor.whiteColor()}, forState:.Normal)
For changing the icon' color you can either set the image for the given state where your image already have the good color. 要更改图标的颜色,您可以将图像设置为图像已经具有良好颜色的给定状态。
self.tabBarItem.selectedImage = [[UIImage imageNamed:@"selectedImage"]
imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
self.tabBarItem.image = [[UIImage imageNamed:@"notSelectedImage"]
imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
Or you can do it this way : 或者,您可以通过以下方式进行操作:
Add an extension to UIImage
class (from this answer ) : 向
UIImage
类添加扩展(从此答案开始 ):
extension UIImage {
func imageWithColor(color1: UIColor) -> UIImage {
UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)
let context = UIGraphicsGetCurrentContext() as CGContextRef
CGContextTranslateCTM(context, 0, self.size.height)
CGContextScaleCTM(context, 1.0, -1.0);
CGContextSetBlendMode(context, kCGBlendModeNormal)
let rect = CGRectMake(0, 0, self.size.width, self.size.height) as CGRect
CGContextClipToMask(context, rect, self.CGImage)
color1.setFill()
CGContextFillRect(context, rect)
let newImage = UIGraphicsGetImageFromCurrentImageContext() as UIImage
UIGraphicsEndImageContext()
return newImage
}
}
And in your viewDidLoad
: 在您的
viewDidLoad
:
for item in self.tabBar.items as [UITabBarItem] {
if let image = item.image {
item.image = image.imageWithColor(UIColor.blackColor()).imageWithRenderingMode(.AlwaysOriginal)
}
}
In iOS 11 you can set the property directly at UIToolBar in storyboard: 在iOS 11中,您可以直接在情节提要中的UIToolBar上设置属性:
unselectedItemTintColor | unselectedItemTintColor | Color |
颜色| [desired color]
[所需颜色]
Xcode print Xcode打印
Complementing @BoilingLime's answer, here it goes the second alternative's UIImage extension in Swift 3: 补充@BoilingLime的答案,在这里它是Swift 3中第二种替代方法的UIImage扩展:
extension UIImage {
func imageWithColor(color1: UIColor) -> UIImage {
UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)
let context = UIGraphicsGetCurrentContext()! as CGContext
context.translateBy(x: 0, y: self.size.height)
context.scaleBy(x: 1.0, y: -1.0);
context.setBlendMode(CGBlendMode.normal)
let rect = CGRect(x: 0, y: 0, width: self.size.width, height: self.size.height)
context.clip(to: rect, mask: self.cgImage!)
color1.setFill()
context.fill(rect)
let newImage = UIGraphicsGetImageFromCurrentImageContext()! as UIImage
UIGraphicsEndImageContext()
return newImage
}
}
Swift 4+ 迅捷4+
UITabBar.appearance().unselectedItemTintColor = UIColor.green
Use this code in appDelegate's didFinishLaunchingWithOptions
method. 在
appDelegate's didFinishLaunchingWithOptions
方法中使用此代码。
If you are looking for an iOS 11 swift 4 solution, do something like this in the appDelegate. 如果您正在寻找iOS 11 swift 4解决方案,请在appDelegate中执行类似的操作。 This is changing all the unselected tab bar items to black.
这会将所有未选中的选项卡栏项目更改为黑色。
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
UITabBar.appearance().unselectedItemTintColor = UIColor(displayP3Red: 0, green: 0, blue: 0, alpha: 1)
return true
}
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