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You're reading from SwiftUI Essentials – iOS 14 Edition Developing iOS Apps Using SwiftUI, Swift 5, and Xcode 12

Product type Paperback

Published in May 2021

Publisher Packt

ISBN-13 9781801813228

Length 494 pages

Edition 1st Edition

Languages

Swift

Tools

iOS

Concepts

iOS Development

Author (1):

Neil Smyth

View More author details

Table of Contents (56) Chapters

1. Start Here

2. Joining the Apple Developer Program FREE CHAPTER

3. Installing Xcode 12 and the iOS 14 SDK

4. An Introduction to Xcode 12 Playgrounds

5. Swift Data Types, Constants and Variables

6. Swift Operators and Expressions

7. Swift Control Flow

8. The Swift Switch Statement

9. Swift Functions, Methods and Closures

10. The Basics of Swift Object-Oriented Programming

11. An Introduction to Swift Subclassing and Extensions

12. An Introduction to Swift Structures and Enumerations

13. An Introduction to Swift Property Wrappers

14. Working with Array and Dictionary Collections in Swift

15. Understanding Error Handling in Swift 5

16. An Overview of SwiftUI

17. Using Xcode in SwiftUI Mode

18. SwiftUI Architecture

19. The Anatomy of a Basic SwiftUI Project

20. Creating Custom Views with SwiftUI

21. SwiftUI Stacks and Frames

22. SwiftUI State Properties, Observable, State and Environment Objects

23. A SwiftUI Example Tutorial

24. SwiftUI Lifecycle Event Modifiers

25. SwiftUI Observable and Environment Objects – A Tutorial

26. SwiftUI Data Persistence using AppStorage and SceneStorage

27. SwiftUI Stack Alignment and Alignment Guides

28. SwiftUI Lists and Navigation

29. A SwiftUI List and Navigation Tutorial

30. An Overview of List, OutlineGroup and DisclosureGroup

31. A SwiftUI List, OutlineGroup and DisclosureGroup Tutorial

32. Building SwiftUI Grids with LazyVGrid and LazyHGrid

33. Building Tabbed and Paged Views in SwiftUI

34. Building Context Menus in SwiftUI

35. Basic SwiftUI Graphics Drawing

36. SwiftUI Animation and Transitions

37. Working with Gesture Recognizers in SwiftUI

38. Creating a Customized SwiftUI ProgressView

39. An Overview of SwiftUI DocumentGroup Scenes

40. A SwiftUI DocumentGroup Tutorial

41. An Introduction to SiriKit

42. A SwiftUI SiriKit Messaging Extension Tutorial

43. Customizing the SiriKit Intent User Interface

44. A SwiftUI SiriKit NSUserActivity Tutorial

45. An Overview of Siri Shortcut App Integration

46. A SwiftUI Siri Shortcut Tutorial

47. Building Widgets with SwiftUI and WidgetKit

48. A SwiftUI WidgetKit Tutorial

49. Supporting WidgetKit Size Families

50. A SwiftUI WidgetKit Deep Link Tutorial

51. Adding Configuration Options to a WidgetKit Widget

52. Integrating UIViews with SwiftUI

53. Integrating UIViewControllers with SwiftUI

54. Integrating SwiftUI with UIKit

55. Preparing and Submitting an iOS 14 Application to the App Store

Index

32.2 GridItems

Each row or column in a grid layout is represented by an instance of the GridItem view. In other words, a GridItem instance represents each row in a LazyHGrid layout and each column when using the LazyVGrid view. The GridItem view defines the properties of the row or column in terms of sizing behavior, spacing and alignment. The GridItem view also provides control over the number of rows or columns displayed within a grid and the minimum size to which an item may be reduced to meet those constraints.

GridItems are declared using the following syntax:

GridItem(sizing, spacing: CGFloat?, alignment: <alignment>)

The sizing argument is of type GridItemSize and must be declared as one of the following:

•flexible() – The number of rows or columns in the grid will be dictated by the number of GridItem instances in the array passed to LazyVGrid or LazyHGrid view.

•adaptive(minimum: CGFloat) – The size of the row or column is adjusted...

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You're reading from SwiftUI Essentials – iOS 14 Edition Developing iOS Apps Using SwiftUI, Swift 5, and Xcode 12

Table of Contents (56) Chapters

Authors (1)

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You're reading from SwiftUI Essentials – iOS 14 Edition Developing iOS Apps Using SwiftUI, Swift 5, and Xcode 12

Table of Contents (56) Chapters

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Authors (1)

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