Swipe Actions

Add contextual actions with .swipeActions on list rows.

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Example: Trailing delete

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct SwipeTrailingDemo: View {
  @State private var items = ["A","B","C"]
  var body: some View {
List {
  ForEach(items, id: \.self) { item in
    Text(item)
      .swipeActions(edge: .trailing) {
        Button(role: .destructive) { items.removeAll { $0 == item } } label: { Label("Delete", systemImage: "trash") }
      }
  }
}
  }
}

---

---

Example: Leading actions

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct SwipeLeadingDemo: View {
  @State private var items = ["A","B","C"]
  @State private var favorites: Set<String> = []
  var body: some View {
List {
  ForEach(items, id: \.self) { item in
    HStack { Text(item); if favorites.contains(item) { Image(systemName: "star.fill").foregroundStyle(.yellow) } }
      .swipeActions(edge: .leading) {
        Button { favorites.insert(item) } label: { Label("Favorite", systemImage: "star") }
        Button { /* share */ } label: { Label("Share", systemImage: "square.and.arrow.up") }
      }
  }
}
  }
}

SwiftUI Lists & Forms Inputs

Collect user input with TextField, Toggle, and Picker.

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Collect input with TextField, Toggle, and Picker

Use form controls bound to @State to capture text, booleans, and choices.

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct InputsDemo: View {
  @State private var name = ""
  @State private var enabled = true
  @State private var choice = 1
  var body: some View {
Form {
  TextField("Name", text: $name)
  Toggle("Enabled", isOn: $enabled)
  Picker("Choice", selection: $choice) {
    Text("One").tag(1)
    Text("Two").tag(2)
  }
}
  }
}

The example above shows a form with text, toggle, and picker controls bound to @State.

---

---

Segmented Picker & Stepper

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct InputsAdvancedDemo: View {
  @State private var selection = 0
  @State private var count = 1
  var body: some View {
Form {
  Picker("Options", selection: $selection) {
    Text("A").tag(0); Text("B").tag(1); Text("C").tag(2)
  }
  .pickerStyle(.segmented)
  Stepper("Count: \(count)", value: $count, in: 1...5)
}
  }
}

SwiftUI Lists & Forms: Form

Group input controls with Form to build settings and data-entry screens.

---

Example: Basic Form

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct FormBasicDemo: View {
  @State private var name = ""
  @State private var notifications = true
  var body: some View {
Form {
  Section(header: Text("Profile")) { TextField("Name", text: $name) }
  Section(header: Text("Preferences")) { Toggle("Notifications", isOn: $notifications) }
}
  }
}

---

---

Example: Validation & Submit

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct FormAdvancedDemo: View {
  @State private var email = ""
  @State private var accepted = false
  var valid: Bool { email.contains("@") && accepted }
  var body: some View {
Form {
  Section(header: Text("Account")) {
    TextField("Email", text: $email).keyboardType(.emailAddress)
    Toggle("Accept Terms", isOn: $accepted)
  }
  Section { Button("Submit") { } .disabled(!valid) }
}
  }
}

Section

Group rows in lists and inputs in forms using Section with optional headers and footers.

---

Example: Sections in List

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct SectionListDemo: View {
  var body: some View {
List {
  Section(header: Text("Fruits"), footer: Text("End Fruits")) {
    Text("Apple"); Text("Banana")
  }
  Section(header: Text("Veggies")) { Text("Carrot") }
}
  }
}

---

---

Example: Sections in Form

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct SectionFormDemo: View {
  @State private var name = ""
  @State private var notifications = true
  var body: some View {
Form {
  Section(header: Text("Profile"), footer: Text("Shown to others")) {
    TextField("Name", text: $name)
  }
  Section(header: Text("Preferences")) {
    Toggle("Notifications", isOn: $notifications)
  }
}
  }
}

ForEach

Iterate over collections to generate views dynamically using ForEach.

---

ForEach

Render a list of items using ForEach.

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct ForEachDemo: View {
  let nums = [1,2,3]
  var body: some View {
VStack {
  ForEach(nums, id: \.self) { n in
    Text("Item \(n)")
  }
}
  }
}

List

Render collections with List using identifiable items.

---

Basic List

Render a list of items using List and ForEach.

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct Item: Identifiable { let id: Int; let title: String }

struct ListBasicDemo: View {
  let items = [Item(id: 1, title: "Milk"), Item(id: 2, title: "Bread")]
  var body: some View { List(items) { Text($0.title) } }
}

The example above shows a list of items using List and ForEach.

---

---

Custom rows with ForEach

Render a list of items using List and ForEach.

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct Product: Identifiable { let id: Int; let name: String; let price: Double }

struct ListCustomRowsDemo: View {
  let items = [
Product(id: 1, name: "Coffee", price: 2.99),
Product(id: 2, name: "Tea", price: 1.99)
  ]
  var body: some View {
List {
  ForEach(items) { p in
    HStack { Text(p.name); Spacer(); Text(String(format: "$%.2f", p.price)) }
  }
}
  }
}

SwiftUI Lists & Forms

Build data-driven lists with List and collect inputs with Form, rows, and controls.

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Lists

Render collections with List and ForEach using identifiable items.

Syntax:

• List(items) { Text($0.title) }
• or List { ForEach(items) { ... } }

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct Todo: Identifiable { let id: Int; let title: String }

struct TodoList: View {
  let items = [Todo(id: 1, title: "Buy milk"), Todo(id: 2, title: "Walk dog")]
  var body: some View {
List(items) { t in Text(t.title) }
  }
}

This example displays a simple list of identifiable items using List.

---

---

Forms

Group input controls using Form and built-in rows.

Syntax: Form { Section { TextField(...) } Toggle(...) Stepper(...) }

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct SettingsForm: View {
  @State private var name = ""
  @State private var notifications = true
  @State private var count = 1
  var body: some View {
Form {
  Section(header: Text("Profile")) {
    TextField("Name", text: $name)
  }
  Section(header: Text("Preferences")) {
    Toggle("Notifications", isOn: $notifications)
    Stepper("Count: \(count)", value: $count, in: 1...10)
  }
}
  }
}

Environment (Values)

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SwiftUI Data Flow @Environment (Values)

Read system- or app-provided values like color scheme and locale using @Environment.

---

Read environment values (color scheme)

Access the current color scheme from the environment and display it in the UI.

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct EnvironmentDemo: View {
  @Environment(\.colorScheme) var scheme
  var body: some View {
Text(scheme == .dark ? "Scheme: Dark" : "Scheme: Light")
  .padding()
  }
}

The example above shows a shared object from an ancestor using .environmentObject and consume it in descendants via @EnvironmentObject.

@EnvironmentObject

Provide shared app-wide state from an ancestor view and consume it with @EnvironmentObject.

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Share app-wide state with @EnvironmentObject

Provide a shared object from an ancestor using .environmentObject and consume it in descendants via @EnvironmentObject.

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

final class AppSettings: ObservableObject { @Published var theme = "Light" }

struct Root: View {
  @StateObject private var settings = AppSettings()
  var body: some View {
VStack(spacing: 8) {
  Button("Toggle") { settings.theme = (settings.theme == "Light") ? "Dark" : "Light" }
  Child()
}
.environmentObject(settings)
.padding()
  }
}

struct Child: View {
  @EnvironmentObject var settings: AppSettings
  var body: some View { Text("Theme: \(settings.theme)") }
}

@Binding

Use @Binding to pass a reference to a parent’s state into a child view so updates flow back.

---

Bind child input to parent state

Bind a parent’s state to a child input so edits update the parent value in real time.

Example

Demo.swift

ContentView.swift

App.swift

import SwiftUI

struct Child: View {
  @Binding var text: String
  var body: some View {
TextField("Enter", text: $text)
  .textFieldStyle(.roundedBorder)
  }
}

struct Parent: View {
  @State private var name = "Kai"
  var body: some View {
VStack {
  Text(name)
  Child(text: $name)
}
.padding()
  }
}