我将 SwiftUI 与 Xcode 11 一起使用,我想NavigationBarTitle
用这些代码行更改字体:
.navigationBarTitle (Text("Navigation Bar Title"), displayMode: .inline)
.font(.subheadline)
但什么也没发生。有什么建议或意见吗?
在 SwiftUI 中,此时我们不能navigationBarTitle
直接改变字体,但是你可以像这样改变 navigationBar 的外观,
struct YourView: View {
init() {
//Use this if NavigationBarTitle is with Large Font
//UINavigationBar.appearance().largeTitleTextAttributes = [.font : UIFont(name: "Georgia-Bold", size: 20)!]
//Use this if NavigationBarTitle is with displayMode = .inline
UINavigationBar.appearance().titleTextAttributes = [.font : UIFont(name: "Georgia-Bold", size: 20)!]
}
var body: some View {
NavigationView {
Text("Hello World!")
//.navigationBarTitle("TEST")
.navigationBarTitle (Text("TEST"), displayMode: .inline)
}
}
}
我希望它会帮助你。谢谢!!
您还不能使用修饰符更改navigationBarTitle
' 字体(在 Xcode 11-Beta2 中测试)。.font
但是您可以构建自己的自定义navigationBarView
并完全访问其任何子视图,如下所示:
struct NavigationBarView: View {
var body: some View {
VStack(spacing: 0) {
Rectangle()
.foregroundColor(Style.Color.navigationBarColor)
.edgesIgnoringSafeArea(.top)
.frame(height: 0)
Rectangle()
.foregroundColor(Style.Color.navigationBarColor)
.frame(height: 64)
.overlay(
HStack() {
Image("close")
Spacer()
Text("سفر به سلامت")
.font(Style.Font.navigationTitle)
.color(Style.Color.darkTextColor)
.multilineTextAlignment(.center)
Spacer()
Image("menu")
}
)
Spacer()
}
.edgesIgnoringSafeArea(.horizontal)
}
}
请注意,您将失去LargeTitleStyle
此实现。
我认为您必须创建一个 NavigationBarBuilder。
struct NavigationBarBuilder: UIViewControllerRepresentable {
var build: (UINavigationController) -> Void = { _ in }
func makeUIViewController(context: UIViewControllerRepresentableContext<NavigationBarBuilder>) -> UIViewController {
UIViewController()
}
func updateUIViewController(_ uiViewController: UIViewController, context: UIViewControllerRepresentableContext<NavigationBarBuilder>) {
if let navigationController = uiViewController.navigationController{
self.build(navigationController)
}
}
}
您可以在内容视图中使用它。
struct ContentView: View {
var body: some View {
NavigationView {
Text("")
.navigationBarTitle("Türkiye", displayMode: .inline)
.background(NavigationBarBuilder {navigationController in
navigationController.navigationBar.barTintColor = .red
navigationController.navigationBar.titleTextAttributes = [.foregroundColor: UIColor.white]
})
}
.navigationViewStyle(StackNavigationViewStyle())
}
}
祝你好运...
在 SwiftUI 5 UINavigationBar.appearance().titleTextAttributes 中不起作用。您需要使用以下方法之一来更改标题中的字体:
init () {
UINavigationBar.appearance().largeTitleTextAttributes = [.font : UIFont(name: "Georgia", size: 20)!]
// OR
UINavigationBar.appearance().largeTitleTextAttributes = [.font:UIFont.preferredFont(forTextStyle:.text-style)]
}
其中 .text-style 可以在 UIFont.TextStyle 文档中找到,例如
.caption
.body
.title1
.title2
.title3
etc
更新 1(回答关于评论中确切代码的问题)
struct ContentView: View {
init () {
let paragraph = NSMutableParagraphStyle()
paragraph.alignment = .center
UINavigationBar.appearance().largeTitleTextAttributes = [.font:UIFont.preferredFont(forTextStyle:.title2),
.foregroundColor:UIColor.systemBlue,
.paragraphStyle: paragraph
]
...
然后在体内我有这个。您可能应该注意 displayMode 参数
// Body is in the same ContentView struct. Settings from init will be used in navigationBarTitle
// listView() is just a custom function returning a SwiftUI's List()
var body: some View {
NavigationView {
listView()
.navigationBarTitle(
Text(self.accts.selCount <= 0 ? "Accounts" : "\(self.accts.selCount) selected")
,
displayMode:.large)
就我而言,上述答案不起作用。但是下面的代码运行良好。
let appearance = UINavigationBarAppearance()
appearance.titleTextAttributes = [.font : UIFont(name: "Georgia-Bold", size: 20)!]