Multiple type variables in Swift
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Make your models conform to the same protocol to create multiple type variables
SwiftUI Advanced Handbook
1
Firebase Auth
8:18
2
Read from Firestore
8:01
3
Write to Firestore
5:35
4
Join an Array of Strings
3:33
5
Data from JSON
5:08
6
HTTP Request
6:31
7
WKWebView
5:25
8
Code Highlighting in a WebView
5:11
9
Test for Production in the Simulator
1:43
10
Debug Performance in a WebView
1:57
11
Debug a Crash Log
2:22
12
Simulate a Bad Network
2:11
13
Archive a Build in Xcode
1:28
14
Apollo GraphQL Part I
6:21
15
Apollo GraphQL Part 2
6:43
16
Apollo GraphQL Part 3
5:08
17
Configuration Files in Xcode
4:35
18
App Review
5:43
19
ImagePicker
5:06
20
Compress a UIImage
3:32
21
Firebase Storage
11:11
22
Search Feature
9:13
23
Push Notifications Part 1
5:59
24
Push Notifications Part 2
6:30
25
Push Notifications Part 3
6:13
26
Network Connection
6:49
27
Download Files Locally Part 1
6:05
28
Download Files Locally Part 2
6:02
29
Offline Data with Realm
10:20
30
HTTP Request with Async Await
6:11
31
Xcode Cloud
9:23
32
SceneStorage and TabView
3:52
33
Network Connection Observer
4:37
34
Apollo GraphQL Caching
9:42
35
Create a model from an API response
5:37
36
Multiple type variables in Swift
4:23
37
Parsing Data with SwiftyJSON
9:36
38
ShazamKit
12:38
39
Firebase Remote Config
9:05
Create your two different models
Firstly, we need to define two different models (or two different types of data). Create a Models.swift file, where we'll store all of our models. Let's create Car model as our first model. The properties of each Car are color , year and brand.
// Models.swift
struct Car {
var color: String
var year: Int
var brand: String
}Next, we'll create our second model. It will be a Truck . The properties are color , year and status.
// Models.swift
struct Truck {
var color: String
var year: Int
var status: String
}Create the protocol
We need to create a protocol and make the Car and the Truck models conform to it. Inside of the protocol, we need to define the properties that Car and Truck have in common: color and year.
// Models.swift
protocol Transport {
var color: String { get }
var year: Int { get }
}Use the protocol
Back to our models, we will need to make the Car and Truck conform to the Transport protocol.
// Models.swift
struct Car: Transport {
[...]
}
struct Truck: Transport {
[...]
}Create your data
Create a Car instance and a Truck instance.
var car = Car(color: "red", year: 2000, brand: "Toyota")
var truck = Truck(color: "white", year: 2004, status: "used")Create your function
You can now create a function or a View that will take a variable of Transport type, and you'll be able to pass either a Car data or a Truck data as an argument. In our case, we'll create a function that will return the transportation's color.
func returnTransportColor(transport: Transport) -> String {
return transport.color
}Call the function
Simply call the function. As a result, you'll get red for the car and white for the truck.
returnTransportColor(transport: car) // Output: "red"
returnTransportColor(transport: truck) // Output: "white"Final code
The final code will look like this:
// Create the Car model
struct Car: Transport {
var color: String
var year: Int
var brand: String
}
// Create the Truck model
struct Truck: Transport {
var color: String
var year: Int
var status: String
}
// Create the protocol that Car and Truck will conform to
protocol Transport {
var color: String { get }
var year: Int { get }
}
// Create your variables
var car = Car(color: "red", year: 2000, brand: "Toyota")
var truck = Truck(color: "white", year: 2004, status: "used")
func returnTransportColor(transport: Transport) -> String {
return transport.color
}
// Call your function
returnTransportColor(transport: car) // Output: "red"
returnTransportColor(transport: truck) // Output: "white"Learn with videos and source files. Available to Pro subscribers only.
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1
Firebase Auth
How to install Firebase authentification to your Xcode project
8:18
2
Read from Firestore
Install Cloud Firestore in your application to fetch and read data from a collection
8:01
3
Write to Firestore
Save the data users input in your application in a Firestore collection
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Join an Array of Strings
Turn your array into a serialized String
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Data from JSON
Load data from a JSON file into your SwiftUI application
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HTTP Request
Create an HTTP Get Request to fetch data from an API
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WKWebView
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Test for Production in the Simulator
Build your app on Release scheme to test for production
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Debug Performance in a WebView
Enable Safari's WebInspector to debug the performance of a WebView in your application
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Debug a Crash Log
Learn how to debug a crash log from App Store Connect in Xcode
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Test your SwiftUI application by simulating a bad network connection with Network Link Conditionner
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Apollo GraphQL Part I
Install Apollo GraphQL in your project to fetch data from an API
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Apollo GraphQL Part 2
Make a network call to fetch your data and process it into your own data type
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Apollo GraphQL Part 3
Display the data fetched with Apollo GraphQL in your View
5:08
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Configuration Files in Xcode
Create configuration files and add variables depending on the environment - development or production
4:35
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App Review
Request an app review from your user for the AppStore
5:43
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ImagePicker
Create an ImagePicker to choose a photo from the library or take a photo from the camera
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Compress a UIImage
Compress a UIImage by converting it to JPEG, reducing its size and quality
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Firebase Storage
Upload, delete and list files in Firebase Storage
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Search Feature
Implement a search feature to filter through your content in your SwiftUI application
9:13
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Push Notifications Part 1
Set up Firebase Cloud Messaging as a provider server to send push notifications to your users
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Push Notifications Part 2
Create an AppDelegate to ask permission to send push notifications using Apple Push Notifications service and Firebase Cloud Messaging
6:30
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Push Notifications Part 3
Tie everything together and test your push notifications feature in production
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Network Connection
Verify the network connection of your user to perform tasks depending on their network's reachability
6:49
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Download Files Locally Part 1
Download videos and files locally so users can watch them offline
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Download Files Locally Part 2
Learn how to use the DownloadManager class in your views for offline video viewing
6:02
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Offline Data with Realm
Save your SwiftUI data into a Realm so users can access them offline
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HTTP Request with Async Await
Create an HTTP get request function using async await
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Xcode Cloud
Automate workflows with Xcode Cloud
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SceneStorage and TabView
Use @SceneStorage with TabView for better user experience on iPad
3:52
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Network Connection Observer
Observe the network connection state using NWPathMonitor
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Apollo GraphQL Caching
Cache data for offline availability with Apollo GraphQL
9:42
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Create a model from an API response
Learn how to create a SwiftUI model out of the response body of an API
5:37
36
Multiple type variables in Swift
Make your models conform to the same protocol to create multiple type variables
4:23
37
Parsing Data with SwiftyJSON
Make API calls and easily parse data with this JSON package
9:36
38
ShazamKit
Build a simple Shazam clone and perform music recognition
12:38
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Firebase Remote Config
Deliver changes to your app on the fly remotely
9:05
Meet the instructor
We all try to be consistent with our way of teaching step-by-step, providing source files and prioritizing design in our courses.
Stephanie Diep
iOS and Web developer
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