SwiftUI开发：iOS键盘工具栏出现两个Done按钮问题求助

我正在学习SwiftUI教程，尝试通过.focus()修饰符和布尔值实现点击Done按钮隐藏键盘，但遇到两个问题：

• 键盘工具栏显示两个Done按钮，但我只添加了一个自定义按钮
• 移除自定义按钮后，工具栏不再显示Done按钮，无法隐藏键盘

已在预览和iPhone模拟器测试，未在物理设备测试。

截图 #

我的代码 #

//  ContentView.swift
//  WeSplit


import SwiftUI

struct ContentView: View {
    @State private var checkAmount = 0.0
    @State private var numberOfPeople = 2
    @State private var tipPercentage = 20
    @FocusState private var amountIsFocused: Bool
    
    let tipPercentages = [10, 15, 20, 25, 0]
    
    //For Total cost + tip
    var grandTotal: Double{
        let tipSelection = Double(tipPercentage)
        let tipValue = checkAmount / 100 * tipSelection
        let grandTotal = checkAmount + tipValue
        
        return grandTotal
    }
    
    
    //For individual share
    var totalPerPerson: Double{
        let peopleCount = Double(numberOfPeople + 2)
        let amountPerPerson = grandTotal / peopleCount
    
        return amountPerPerson
    }
    
    
    
    var body: some View {
        NavigationView {
            Form{
                Section{
                    TextField("Amount: ", value: $checkAmount, format: .currency(code: Locale.current.currencyCode ?? "USD"))
                        .keyboardType(.decimalPad)
                        .focused($amountIsFocused)
                    
                    Picker("Number of people", selection: $numberOfPeople){
                        ForEach(2..<100){
                            Text("\($0) people")
                        }
                    }
                }
                
                Section{
                    Picker("Tip Percentage", selection: $tipPercentage){
                        ForEach(tipPercentages, id:\.self){
                            Text($0, format: .percent)
                        }
                    }.pickerStyle(.segmented)
                                        
                }header: {
                    Text("How much tip do you want to leave?")
                }
                
                
                //Grand Total
                Section{
                    Text(grandTotal, format:.currency(code: Locale.current.currencyCode ?? "USD"))
                }header: {
                    Text("Total Cost + Tip")
                }
                
                
                //Showing each person's share
                Section{
                    Text(totalPerPerson, format: .currency(code: Locale.current.currencyCode ?? "USD"))
                }header: {
                    Text("Amount Per Person")
                }.navigationTitle("WeSplit")
                    .toolbar(){
                        ToolbarItemGroup(placement: .keyboard){
                            
                            Button("Done"){
                                amountIsFocused = false
                            }
                        }
                    }
                
                
                
            }
        }
    }
        
}



struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

问题根源是你把.navigationTitle()和.toolbar()修饰符添加到了最后一个Section上，而非Form或NavigationView层级。SwiftUI会为每个Section单独生成工具栏，导致重复出现Done按钮。

修复步骤 #

1. 将.navigationTitle("WeSplit")和.toolbar()从最后一个Section移到Form的末尾（或NavigationView内部的根视图上）
2. 确保工具栏修饰符只作用于整个导航视图的根层级，避免重复生成

修改后的核心代码 #

var body: some View {
    NavigationView {
        Form{
            // 所有原有Section内容保持不变
        }
        .navigationTitle("WeSplit") // 移至Form层级
        .toolbar {
            ToolbarItemGroup(placement: .keyboard) {
                Button("Done") {
                    amountIsFocused = false
                }
            }
        } // 移至Form层级
    }
}

补充说明 #

• .decimalPad类型的键盘默认没有自带Done按钮，必须手动添加工具栏按钮才能实现隐藏功能
• 若将工具栏修饰符加在Section上，每个包含可聚焦控件（如TextField）的Section都会生成独立工具栏，导致按钮重复

内容的提问来源于stack exchange，提问作者Ethan