在 FocusState 中传递通用 Hashable

Question

我有一个视图，我想将其放入我的公共包中。

此 MyTextField 设计用于：

struct ContentView2: View {
    enum Field: Hashable, CaseIterable {
        case name
        case fullName
        case age
    }
    
    @FocusState private var focusedField: Field?
    .....

我的文本字段：

struct MyTextField: View {

    @Binding var text: String
    let systemName: String = ""
    let focusedValue: ContentView2.Field
    
    var focusedField: FocusState<ContentView2.Field?>.Binding
        
    init(text: Binding<String>,  systemName: String, focusedField: FocusState<ContentView2.Field?>.Binding, focusedValue: ContentView2.Field) {
        self._text = text
        self.focusedField = focusedField
        self.focusedValue = focusedValue
    }
    
    var body: some View {
        HStack {
            Image(systemName: systemName)
            TextField("Name", text: $text)
                .focused(focusedField, equals: focusedValue)
                .textFieldStyle(.roundedBorder)
        }
    }
}

如果我尝试将通用 Hashable 作为输入，来自

var focusedField: FocusState<ContentView2.Field?>.Binding

至

var focusedField: FocusState<Hashable>.Binding

我收到错误

Protocol 'Hashable' as a type cannot conform to the protocol itself

Answer 1

这可能有帮助

struct MyTextField<value: Hashable>: View {

var focusedField: (binding: FocusState<value?>.Binding, equals: value?)

var body: some View {

        HStack {

            Image(systemName: systemName)
            TextField("Name", text: $text)
                .focused(focusedField.binding,
                          equals: focusedValue.equals)
                .textFieldStyle(.roundedBorder)
       }
   } 
}

Answer 2

有点晚了，但我会把这个放在这里，供前来寻求的人

import SwiftUI

struct CustomTextField<V: Hashable>: View {
    
    // MARK: - PROPERTIES
    
    @Binding var text: String
    @FocusState.Binding var focused: V?
    var equals: V
    
    // MARK: - BODY
    
    var body: some View {
        
        TextField("placeholder", text: $text)
            .focused($focused, equals: equals)
            .textFieldStyle(.roundedBorder)
            .padding()
        
    }
 }