带选择器的 SwiftUI 列表:选择不适用于自定义类型 (macOS)
SwiftUI List with selector: selecting does not work for custom type (macOS)
我不知道我做错了什么;基本上我无法在我的 macOS 应用程序的自定义类型列表中获得 selection。我是否缺少一致性?
List1
表示我的自定义类型的列表,其中我不能 select 一个条目,而在 List2
中,我只使用 Int,它可以工作。
这些是我的观点:
struct ContentView: View {
var body: some View {
VStack {
ListView1()
Divider()
ListView2()
}
}
}
struct ListView1: View {
@State private var selection: Item? = nil
var localSyslogEntries = [
Item(message: "message 1"),
Item(message: "message 2"),
Item(message: "message 3"),
]
var body: some View {
List(localSyslogEntries, selection: $selection) { entry in
VStack {
Text(entry.id.uuidString)
Divider()
}
}
.frame(minHeight: 200.0)
}
}
struct ListView2: View {
@State private var selection: Int? = nil
var body: some View {
List(0..<10, id: \.self, selection: $selection) { index in
VStack {
Text("Index \(index)")
Divider()
}
}
.frame(minHeight: 200.0)
}
}
这里是自定义类型:
struct Item: Identifiable, Hashable {
let id: UUID
let message: String
init(id: UUID = UUID(), message: String) {
self.id = id
self.message = message
}
}
添加id
List(localSyslogEntries, id: \.self, selection: $selection) { entry in
我不知道我做错了什么;基本上我无法在我的 macOS 应用程序的自定义类型列表中获得 selection。我是否缺少一致性?
List1
表示我的自定义类型的列表,其中我不能 select 一个条目,而在 List2
中,我只使用 Int,它可以工作。
这些是我的观点:
struct ContentView: View {
var body: some View {
VStack {
ListView1()
Divider()
ListView2()
}
}
}
struct ListView1: View {
@State private var selection: Item? = nil
var localSyslogEntries = [
Item(message: "message 1"),
Item(message: "message 2"),
Item(message: "message 3"),
]
var body: some View {
List(localSyslogEntries, selection: $selection) { entry in
VStack {
Text(entry.id.uuidString)
Divider()
}
}
.frame(minHeight: 200.0)
}
}
struct ListView2: View {
@State private var selection: Int? = nil
var body: some View {
List(0..<10, id: \.self, selection: $selection) { index in
VStack {
Text("Index \(index)")
Divider()
}
}
.frame(minHeight: 200.0)
}
}
这里是自定义类型:
struct Item: Identifiable, Hashable {
let id: UUID
let message: String
init(id: UUID = UUID(), message: String) {
self.id = id
self.message = message
}
}
添加id
List(localSyslogEntries, id: \.self, selection: $selection) { entry in