我正在使用一个选择器视图，允许用户为整个应用程序选择颜色主题。
我计划改变导航栏的颜色，背景和可能的标签栏(如果可能的话)。
我一直在研究如何做到这一点，但找不到任何Swift的例子。谁能给我一个代码的例子，我需要用来改变导航栏的颜色和导航栏的文本颜色?
选取器视图已经设置好，我正在寻找更改UI颜色的代码。
当前回答
在AppDelegate中试试这个:
//MARK:- ~~~~~~~~~~setupApplicationUIAppearance Method
func setupApplicationUIAppearance() {
UIApplication.shared.statusBarView?.backgroundColor = UIColor.clear
var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
UINavigationBar.appearance().tintColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)
UINavigationBar.appearance().barTintColor = UIColor.white
UINavigationBar.appearance().isTranslucent = false
let attributes: [NSAttributedString.Key: AnyObject]
if DeviceType.IS_IPAD{
attributes = [
NSAttributedString.Key.foregroundColor: UIColor.white,
NSAttributedString.Key.font: UIFont(name: "HelveticaNeue", size: 30)
] as [NSAttributedString.Key : AnyObject]
}else{
attributes = [
NSAttributedString.Key.foregroundColor: UIColor.white
]
}
UINavigationBar.appearance().titleTextAttributes = attributes
}
iOS 13
func setupNavigationBar() {
// if #available(iOS 13, *) {
// let window = UIApplication.shared.windows.filter {$0.isKeyWindow}.first
// let statusBar = UIView(frame: window?.windowScene?.statusBarManager?.statusBarFrame ?? CGRect.zero)
// statusBar.backgroundColor = #colorLiteral(red: 0.2784313725, green: 0.4549019608, blue: 0.5921568627, alpha: 1) //UIColor.init(hexString: "#002856")
// //statusBar.tintColor = UIColor.init(hexString: "#002856")
// window?.addSubview(statusBar)
// UINavigationBar.appearance().tintColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)
// UINavigationBar.appearance().barTintColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)
// UINavigationBar.appearance().isTranslucent = false
// UINavigationBar.appearance().backgroundColor = #colorLiteral(red: 0.2784313725, green: 0.4549019608, blue: 0.5921568627, alpha: 1)
// UINavigationBar.appearance().titleTextAttributes = [NSAttributedString.Key.foregroundColor : UIColor.white]
// }
// else
// {
UIApplication.shared.statusBarView?.backgroundColor = #colorLiteral(red: 0.2784313725, green: 0.4549019608, blue: 0.5921568627, alpha: 1)
UINavigationBar.appearance().tintColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)
UINavigationBar.appearance().barTintColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)
UINavigationBar.appearance().isTranslucent = false
UINavigationBar.appearance().backgroundColor = #colorLiteral(red: 0.2784313725, green: 0.4549019608, blue: 0.5921568627, alpha: 1)
UINavigationBar.appearance().titleTextAttributes = [NSAttributedString.Key.foregroundColor : UIColor.white]
// }
}
扩展
extension UIApplication {
var statusBarView: UIView? {
if responds(to: Selector(("statusBar"))) {
return value(forKey: "statusBar") as? UIView
}
return nil
}}
其他回答
这里有一些非常基本的外观定制，你可以应用于整个应用程序:
UINavigationBar.appearance().backgroundColor = UIColor.greenColor()
UIBarButtonItem.appearance().tintColor = UIColor.magentaColor()
//Since iOS 7.0 UITextAttributeTextColor was replaced by NSForegroundColorAttributeName
UINavigationBar.appearance().titleTextAttributes = [UITextAttributeTextColor: UIColor.blueColor()]
UITabBar.appearance().backgroundColor = UIColor.yellowColor();
斯威夫特5.4.2:
UINavigationBar.appearance().backgroundColor = .green // backgorund color with gradient
// or
UINavigationBar.appearance().barTintColor = .green // solid color
UIBarButtonItem.appearance().tintColor = .magenta
UINavigationBar.appearance().titleTextAttributes = [NSAttributedString.Key.foregroundColor : UIColor.blue]
UITabBar.appearance().barTintColor = .yellow
更多关于UIAppearance API在Swift你可以阅读这里。
appearance()函数并不总是适用于我。所以我更喜欢创建一个NC对象并改变它的属性。
var navBarColor = navigationController!.navigationBar
navBarColor.barTintColor =
UIColor(red: 255/255.0, green: 0/255.0, blue: 0/255.0, alpha: 100.0/100.0)
navBarColor.titleTextAttributes =
[NSForegroundColorAttributeName: UIColor.whiteColor()]
此外，如果你想添加一个图像而不仅仅是文本，这也是可行的
var imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 70, height: 70))
imageView.contentMode = .ScaleAspectFit
var image = UIImage(named: "logo")
imageView.image = image
navigationItem.titleView = imageView
在AppDelegate中试试这个:
//MARK:- ~~~~~~~~~~setupApplicationUIAppearance Method
func setupApplicationUIAppearance() {
UIApplication.shared.statusBarView?.backgroundColor = UIColor.clear
var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
UINavigationBar.appearance().tintColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)
UINavigationBar.appearance().barTintColor = UIColor.white
UINavigationBar.appearance().isTranslucent = false
let attributes: [NSAttributedString.Key: AnyObject]
if DeviceType.IS_IPAD{
attributes = [
NSAttributedString.Key.foregroundColor: UIColor.white,
NSAttributedString.Key.font: UIFont(name: "HelveticaNeue", size: 30)
] as [NSAttributedString.Key : AnyObject]
}else{
attributes = [
NSAttributedString.Key.foregroundColor: UIColor.white
]
}
UINavigationBar.appearance().titleTextAttributes = attributes
}
iOS 13
func setupNavigationBar() {
// if #available(iOS 13, *) {
// let window = UIApplication.shared.windows.filter {$0.isKeyWindow}.first
// let statusBar = UIView(frame: window?.windowScene?.statusBarManager?.statusBarFrame ?? CGRect.zero)
// statusBar.backgroundColor = #colorLiteral(red: 0.2784313725, green: 0.4549019608, blue: 0.5921568627, alpha: 1) //UIColor.init(hexString: "#002856")
// //statusBar.tintColor = UIColor.init(hexString: "#002856")
// window?.addSubview(statusBar)
// UINavigationBar.appearance().tintColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)
// UINavigationBar.appearance().barTintColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)
// UINavigationBar.appearance().isTranslucent = false
// UINavigationBar.appearance().backgroundColor = #colorLiteral(red: 0.2784313725, green: 0.4549019608, blue: 0.5921568627, alpha: 1)
// UINavigationBar.appearance().titleTextAttributes = [NSAttributedString.Key.foregroundColor : UIColor.white]
// }
// else
// {
UIApplication.shared.statusBarView?.backgroundColor = #colorLiteral(red: 0.2784313725, green: 0.4549019608, blue: 0.5921568627, alpha: 1)
UINavigationBar.appearance().tintColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)
UINavigationBar.appearance().barTintColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)
UINavigationBar.appearance().isTranslucent = false
UINavigationBar.appearance().backgroundColor = #colorLiteral(red: 0.2784313725, green: 0.4549019608, blue: 0.5921568627, alpha: 1)
UINavigationBar.appearance().titleTextAttributes = [NSAttributedString.Key.foregroundColor : UIColor.white]
// }
}
扩展
extension UIApplication {
var statusBarView: UIView? {
if responds(to: Selector(("statusBar"))) {
return value(forKey: "statusBar") as? UIView
}
return nil
}}
首先将navigationBar的isTranslucent属性设置为false以获得所需的颜色。然后像这样改变导航栏的颜色:
@IBOutlet var NavigationBar: UINavigationBar!
NavigationBar.isTranslucent = false
NavigationBar.barTintColor = UIColor (red: 117/255, green: 23/255, blue: 49/255, alpha: 1.0)
Swift 3和Swift 4兼容Xcode 9
一个更好的解决方案是为常见的导航栏创建一个类
我有5个控制器，每个控制器的标题都改为橙色。因为每个控制器都有5个导航控制器，所以我不得不从检查器或代码中改变每一个颜色。
所以我做了一个类，而不是改变每个导航栏从代码我只是分配这个类，它在所有5个控制器代码重用能力。 你只需要将这个类分配给每个控制器就可以了。
import UIKit
class NabigationBar: UINavigationBar {
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonFeatures()
}
func commonFeatures() {
self.backgroundColor = UIColor.white;
UINavigationBar.appearance().titleTextAttributes = [NSAttributedStringKey.foregroundColor:ColorConstants.orangeTextColor]
}
}
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