我正在尝试使用 SwiftUI 为 macOS 应用程序创建主/详细 View 。目标是在侧栏中选择一个项目并使其相应地更改主 View 。我的这个例子的代码如下所示:
import SwiftUI
struct MyMasterView: View {
let names = ["Homer", "Marge", "Bart", "Lisa"]
var body: some View {
List {
ForEach(names, id: \.self) { name in
NavigationLink(name, destination: MyDetailView(name: name))
}
}
.frame(width: 150, height: 300)
}
}
struct MyDetailView: View {
var name = "Name"
var body: some View {
HStack {
Text("Hello \(name)")
.font(.largeTitle)
}
.frame(width: 450, height: 300)
}
}
struct ContentView: View {
var body: some View {
NavigationView {
MyMasterView()
MyDetailView()
}
.navigationViewStyle(DoubleColumnNavigationViewStyle())
.frame(width: 600, height: 300)
}
}
运行 Mac 应用程序时,侧边栏选择可能会变为非事件状态,有时会出现弹出 View 而不是更改详细信息 View 。请参阅下面的问题的屏幕截图视频。这是 Mac 上 SwiftUI NavigationView 的错误,还是我需要实现一些东西才能使其在 macOS 上工作?
https://youtu.be/BF7m1OszZ5w
最佳答案
从 Xcode 11.0 (11A420a) 和 macOS Catalina (19A558d) 开始,NavigationView 按预期工作:
import SwiftUI
struct DetailView: View {
let text: String
var body: some View {
Text(text)
.frame(maxWidth: .infinity, maxHeight: .infinity)
}
}
struct ContentView: View {
private let names = ["Homer", "Marge", "Bart", "Lisa"]
@State private var selection: String?
var body: some View {
NavigationView {
List(selection: $selection) {
Section(header: Text("The Simpsons")) {
ForEach(names, id: \.self) { name in
NavigationLink(destination: DetailView(text: name)) {
Text(name)
}
}
}
}.listStyle(SidebarListStyle())
DetailView(text: "Make a selection")
}
}
}
关于swift - 带有 SwiftUI 的 macOS 应用程序中不稳定的导航 View ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57310454/