在过去的几个小时中,我一直在研究Xcode 11和SwiftUI,试图在NavigationBar中实现TextField。通常,我构建的第一个“世界您好”类型的应用程序是一个简单的Web浏览器:TextField和WKWebView。
但是,我在尝试在固定的.inline
导航栏中实现TextField时异常困难。此外,我似乎无法在任何在线位置找到单个教程或一段代码。我浏览了Google的页面和页面,以及GitHub上的项目,都没有运气。
唯一提到此主题的结果是Reddit主题和论坛讨论帖子–所有这些都提出了相同的问题:“有人能够在NavigationBar中成功实现TextField吗?”尚无人回应。
这是我当前的 ContentView.swift –我删除了实现TextField时崩溃或引发错误的所有编程尝试:
import SwiftUI
import WebKit
let address = "https://developer.apple.com"
struct ContentView: View {
var body: some View {
NavigationView {
VStack {
WebView(request: URLRequest(url: URL(string: address)!))
.edgesIgnoringSafeArea(.bottom)
.edgesIgnoringSafeArea(.leading)
.edgesIgnoringSafeArea(.trailing)
}
.navigationBarTitle("TextField Placeholder", displayMode: NavigationBarItem.TitleDisplayMode.inline)
}
}
}
struct WebView: UIViewRepresentable {
let request: URLRequest
func makeUIView(context: Context) -> WKWebView {
return WKWebView()
}
func updateUIView(_ uiView: WKWebView, context: Context) {
uiView.load(request)
}
}
答案 0 :(得分:1)
我不知道这是否正是您要实现的目标,我认为这可能是一个很好的解决方案:
import SwiftUI
import WebKit
let address = "https://developer.apple.com"
struct ContentView: View {
@State private var text = ""
var body: some View {
NavigationView {
GeometryReader { geometry in
VStack {
WebView(request: URLRequest(url: URL(string: address)!))
.edgesIgnoringSafeArea(.bottom)
.edgesIgnoringSafeArea(.leading)
.edgesIgnoringSafeArea(.trailing)
}
.navigationBarItems(leading:
HStack {
TextField("Type something here...", text: self.$text)
.background(Color.yellow)
}
.padding()
.frame(width: geometry.size.width)
.background(Color.green)
)
}
}
}
}
struct WebView: UIViewRepresentable {
let request: URLRequest
func makeUIView(context: Context) -> WKWebView {
return WKWebView()
}
func updateUIView(_ uiView: WKWebView, context: Context) {
uiView.load(request)
}
}
#if DEBUG
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
#endif
复制并粘贴上面的代码,让我知道是否可以尝试使用其他方法来改进我的解决方案。我只是为了调试而将绿色和黄色的视图涂上了几色。
答案 1 :(得分:0)
NavigationView {
GeometryReader { geometry in
ZStack {
Text("Hello")
}
.navigationBarTitle(" ", displayMode: .inline)
.navigationBarItems(leading:
HStack {
TextField("Seach for products, brands and more", text: self.$searchText)
}
.frame(width: geometry.size.width - 35,
height: 38,
alignment: .center)
.background(Color.white)
)
.background(NavigationConfigurator { nc in
nc.navigationBar.barTintColor = UIColor(red: 104.0/255.0, green: 194.0/255.0, blue: 25.0/255.0, alpha: 1.0)
})
}
}
.navigationViewStyle(StackNavigationViewStyle())
struct NavigationConfigurator: UIViewControllerRepresentable {
var configure: (UINavigationController) -> Void = { _ in }
func makeUIViewController(context: UIViewControllerRepresentableContext<NavigationConfigurator>) -> UIViewController {
UIViewController()
}
func updateUIViewController(_ uiViewController: UIViewController, context: UIViewControllerRepresentableContext<NavigationConfigurator>) {
if let nc = uiViewController.navigationController {
self.configure(nc)
}
}
}
答案 2 :(得分:0)
有 a new method in iOS 14+ 用指定的项目填充工具栏或导航栏:
func toolbar<Content>(content: () -> Content) -> some View where Content : ToolbarContent