SwiftUI List 编辑模式的使用

本文可以学到如何在SwiftUI 中使用ListView编辑模式 去删除list里的元素

//
//  ContentView.swift
//  ListDemo
//
//  Created by 飞 on 2023/6/14.
//

import SwiftUI

struct ContentView: View {
    
    let fruit = ["Apple", "Orange", "Banana", "", ""]
    
    var isEditingMode: Bool
    /// Only available on iOS 15 and later
    ///
    /// - parameters:
    ///   - isEditingMode: Set `true` if need swipe to delete, otherwise `false`.
    ///
    init(isEditingMode: Bool) {
        self.isEditingMode = isEditingMode
        UITableView.appearance().backgroundColor = .clear
    }
    
    var body: some View {
        if #available(iOS 15.0, *) {
            List {
                ForEach(fruit, id: \.self) { fruit in
                    FruitListItem(fruit:fruit)
                        .listRowBackground(
                            RoundedRectangle(cornerRadius: 8)
                                .foregroundColor(Color.green)
                                .background(Color.red)
            
                        )
                        .swipeActions(allowsFullSwipe: false) {
                            if isEditingMode {
                                Button(role: .destructive) {
                                    print("Deleting conversation")
                                } label: {
                                    Image(systemName: "trash.fill")
                                }
                                .tint(.red)
                            }
                        }
                }
            }
            .modifier(ListBackgroundModifier())
        } else {
            EmptyView()
        }
    }
}

struct FruitListItem: View {
    
    let fruit: String
    
    var body: some View {
        HStack(alignment: .center) {
            RoundedRectangle(cornerRadius: 8)
                .foregroundColor(Color.gray)
            
                .frame(width: 40,height: 40)
                .padding(.top, 8)
            
            
            Text(fruit)
                .font(.system(size: 17, weight: .medium))
                .foregroundColor(.white)
            
        }
        .frame(height: 80)
    }
}

struct ListBackgroundModifier: ViewModifier {
    @ViewBuilder
    func body(content: Content) -> some View {
        if #available(iOS 16.0, *) {
            content
                .scrollContentBackground(.hidden)
        } else {
            content
                .background(Color.gray)
        }
    }
}