Lessons-Learned-SwiftUI.pptx
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This document summarizes Mohammad Azam's presentation on lessons learned from building SwiftUI apps. The presentation covered several SwiftUI architectures, using SwiftUI with Core Data, testing SwiftUI views, view events, environment slicing, evaluating vs rendering views, integrating SwiftUI with UIKit, and more. It provided examples of different architectural patterns that can be used with SwiftUI like MVVM and MVP, and recommendations like preferring the aggregate model pattern with Core Data over other options.
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Lessons-Learned-SwiftUI.pptx
- 1. Mohammad Azam Lessons Learned from Building SwiftUI Apps @azamsharp
- 2. About Me • Mohammad Azam • iOS Developer • Coding bootcamp instructor • Instructor on Udemy & LinkedIn • Author and speaker
- 3. Agenda • SwiftUI Architectures • SwiftUI & Core Data • Testing • View Events • Environment Slicing • Evaluating vs Rendering • SwiftUI & UIKit
- 4. This is NOT application architecture advice!
- 9. Which pattern should I use?
- 23. XAML C# WPF
- 24. AddMovieView
- 25. AddMovieView ! !
- 26. HTML Client Side Form Validation
- 28. View is the View Model
- 29. Declaration of what you want to be displayed on the screen SwiftUI
- 30. Not actual HTML elements. These are Virtual DOM elements managed by React. React
- 31. Consuming API
- 32. @State and .task
- 33. Aggregate Root Model WWDC 2020: Data Essentials in SwiftUI
- 34. Apple’s sample apps Fruta and FoodTruck
- 40. Code is not an asset, it is a liability
- 41. Bigger Apps?
- 42. Multiple Aggregate Root objects based on the bounded context of the application
- 48. onDismiss
- 50. Don’t fight the framework?
- 54. NHibernate LINQ to SQL Entity Framework Sequelize Light Speed
- 56. Base Model and Concrete Implementations
- 57. SwiftUI + Core Data Active Record Pattern
- 58. Xcode Previews
- 59. Container Views 🙂 Structure your app for SwiftUI previews - WWDC20
- 61. Testin g
- 64. But I really want to write a test!!!
- 65. LoginView
- 70. Don’t write unit test for your View Model to verify the user interface.
- 72. 👎🏼
- 73. 👍🏼
- 74. Test behavior not implementation details
- 75. If the implementation details change, the test will fail
- 76. Don’t use mocks for managed dependency
- 78. Test is the isolation, not the thing under test - Ian Cooper
- 81. body is being evaluated
- 82. The only view that is using the @State count
- 83. SwiftUI does not recreate the whole ContentView. It only renders the views that needs to be updated.
- 84. VStack Text(“Counter”) Text(count ) Button List Simplified Tree representation of our ContentView
- 85. VStack Text(“Counter”) Text(count ) Button List Only one of the Text views is using the @State count property
- 86. VStack Text(“Counter”) Text(count ) Button List SwiftUI destroys that view and recreates it again
- 103. Date Formatting
- 104. List Formatting
- 106. Xcode Previews for UIKit
- 107. Injecting SwiftUI View into a UIKit App and Handling Events
- 108. Final thoughts • SwiftUI is the future of app development • Don’t fight the framework • Read Apple’s documentation on SwiftUI • Watch WWDC videos to get better understanding • I don’t know which architecture is best. Try out different ones and see which one works for your needs.
- 111. Contact • azamsharp@gmail.com • @azamsharp • www.azamsharp.com • https://www.udemy.com/user/mohammad-azam-2/