Your Second iOS and SwiftUI App
source link: https://www.raywenderlich.com/15234721-your-second-ios-and-swiftui-app
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List View Fundamentals
Introduction
2:27 FreeLearn what's in store for you as you build Your Second iOS and SwiftUI App. This course builds on the Your First App, and Programming in Swift courses.
List Rows
4:18 FreeA List is a View for organizing data into a scrollable column of rows, and a row can be any View! Before you can have a list, you need a reusable row.
Models and Views
11:24Collectively, the properties of a book will be our data model. A book's image will be computed based on it its stored model data.
Challenge: Book Row
3:10With your Book model, and a simple Image View, set up, it is time to provide a book to the view you'll be using for each of your list rows.
Lists
2:45With enough of your app built up for it to make sense to incorporate a List, it's nearly as simple as hitting "Embed in List"!
Navigation
3:39Use NavigationLink and NavigationView to show a new detail view after tapping on a row in the list of books.
Create a reusable view which you can use for your rows, and their detail views. The "details" will be the entirety of longer titles, and larger images.
Conclusion
0:44Review what you're able to do with lists already, and get a couple of ideas for what you can start thinking about in order to apply SwiftUI Lists in the future.
Data Flow
Introduction
0:46In this part, you'll complete your Book type and create more interactive views. Your app will look great in both light and dark mode, too!
Modal Views
7:25Use a modal sheet in your detail view to present an image picker, and bind the result to your library. Soon, your books can have cover photos!
Color Schemes
4:47The accent color for an app will be applied to certain views, like button labels, to achieve a desired theme.
Image Binding
7:17The reason the images you're adding to your library are not showing up is because Book Images currently only display symbols. Let's fix that!
Alerts
2:53An Alert is a good solution for helping a user avoid an unintentional loss of data. Along with the "sheet", it's another type of modal View.
Challenge time! After setting a book's image, show the user a "delete" button, which will bring up your alert from the previous episode.
Model Objects
7:48Convert a Book instance into "Model Object": a reference type that comes with the power of the Identifiable protocol.
Observable Objects
5:27Combine makes it easy to take an object, observe changes to its properties, and react to those changes, in SwiftUI.
To complete your detail view, make use of a TextField, binding it to a book's micro-review. Then display the review in your list!
Conclusion
0:23You've given your app a bunch of new features in this part. You can interact with your library and books from multiple places, and your UI syncs right up!
Managing Rows
Introduction
0:30In this part, you'll be adding and removing books from your library, and sorting and reorganizing them.
ForEach
4:16A List is not only for displaying a collection of similar views. That's the job of ForEach! Employ them both in order to have more complex columns.
Create a sheet that will bring the user to a new view, where they can fill out the information for a new book to be added to their library.
Environment
13:22An environment is a storage container for potentially any information that multiple views need to function.
Sections
12:29Lists offer customizable Sections, with headers and footers as needed. You'll use a section for each of the two "readMe" options for a book.
ObjectWillChangePublisher powers ObservedObject and EnvironmentObjects in SwiftUI. Use it to propagate ObservableObject changes to collections.
Delete and Move Rows
11:54Using modifiers on a ForEach, move books in your library, or delete them. An Edit Button in the navigation bar can help with both.
Menus
4:32Set up a Menu, in the same toolbar as your Edit button, that will allow for sorting by author, title, or manually.
Challenge: Sort Menu
6:44It's time to get the menu from the previous episode working, and finish up this app, with automatic book sorting!
Conclusion
1:29Let's review some of what you've accomplished along the journey of creating Your Second iOS and SwiftUI App. There are more learning paths in store for you next!
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