Write to Firestore
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Save the data users input in your application in a Firestore collection
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
FirestoreManager class
Create a FirestoreManager class. Learn more about it in the Read from Firestore section of this SwiftUI Handbook.
// FirestoreManager.swift
import Foundation
import Firebase
class FirestoreManager: ObservableObject {
}Create a document
Let's say we want to create a new restaurant called Poutine Fiesta in our database. We will need to create a new document.
To create a document in Firestore, simply follow the code example below.
func createRestaurant(restaurantName: String) {
let db = Firestore.firestore()
let docRef = db.collection("Restaurants").document(restaurantName)
docRef.setData(["name": restaurantName]) { error in
if let error = error {
print("Error writing document: \(error)")
} else {
print("Document successfully written!")
}
}
}In this function, we are passing a restaurantName as an argument. Inside of the function, we are creating a database reference with Firestore.firestore(). Next, we specify our docRef. In my case, I want to save the new document under the Restaurants collection.
If you want to add multiple fields to the document, I suggest you create a dictionary variable (as [String: Any]) with all your data first, then pass it in the .setData method.
// Create your docData variable first
let docData: [String: Any] = [
"name": "PoutineFiesta",
"address": "1234 Restaurant St",
"dateAdded": Timestamp(date: Date()),
]
// Create the document in Firestore
func createRestaurant() {
let db = Firestore.firestore()
let docRef = db.collection("Restaurants").document("PoutineFiesta")
docRef.setData(docData) { error in
if let error = error {
print("Error writing document: \(error)")
} else {
print("Document successfully written!")
}
}
}Note that when using the .setData(), it will overwrite the existing data in the document, unless you set the merge option to true (see below).
Update a document
Let's say that Poutine Fiesta has moved to a new address and we want to update it.
To update a document in Firestore, you can use the .updateData() method.
func updateRestaurant(restaurantName: String, restaurantAddress: String) {
let db = Firestore.firestore()
let docRef = db.collection("Restaurants").document(restaurantName)
docRef.updateData(["address": restaurantAddress]) { error in
if let error = error {
print("Error updating document: \(error)")
} else {
print("Document successfully updated!")
}
}
}However, I prefer to use the .setData() method and set the merge option to true, as it will update the document, and also create it if it doesn't exist. The downside with .updateData() is that it will run into an error if the document doesn't exist.
func updateRestaurant(restaurantName: String, restaurantAddress: String) {
let db = Firestore.firestore()
let docRef = db.collection("Restaurants").document(restaurantName)
// Don't forget the **merge: true** before closing the parentheses!
docRef.setData(["address": restaurantAddress], merge: true) ****{ error in
if let error = error {
print("Error writing document: \(error)")
} else {
print("Document successfully merged!")
}
}
}And voilà! Now you can create new documents and update them in Firestore!
You can read more about adding and updating data in Firestore's documentation.
Update Firestore permission rules
Once you're ready to release your app, remember to update your Firestore rules to protect your database and not allow anyone to read and write your database.
Navigate to Cloud Firestore and click on the Rules tab. There, you'll see the rules that are currently applied to your database.
We added the feature to write to our database, so we will need to add the write keyword.
rules_version = '2';
service cloud.firestore {
match /databases/{database}/documents {
match /{Restaurants=**} {
allow read, write: if true;
}
}
}You can read more about Cloud Firestore Rules here.
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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
5:35
4
Join an Array of Strings
Turn your array into a serialized String
3:33
5
Data from JSON
Load data from a JSON file into your SwiftUI application
5:08
6
HTTP Request
Create an HTTP Get Request to fetch data from an API
6:31
7
WKWebView
Integrate an HTML page into your SwiftUI application using WKWebView and by converting Markdown into HTML
5:25
8
Code Highlighting in a WebView
Use Highlight.js to convert your code blocks into beautiful highlighted code in a WebView
5:11
9
Test for Production in the Simulator
Build your app on Release scheme to test for production
1:43
10
Debug Performance in a WebView
Enable Safari's WebInspector to debug the performance of a WebView in your application
1:57
11
Debug a Crash Log
Learn how to debug a crash log from App Store Connect in Xcode
2:22
12
Simulate a Bad Network
Test your SwiftUI application by simulating a bad network connection with Network Link Conditionner
2:11
13
Archive a Build in Xcode
Archive a build for beta testing or to release in the App Store
1:28
14
Apollo GraphQL Part I
Install Apollo GraphQL in your project to fetch data from an API
6:21
15
Apollo GraphQL Part 2
Make a network call to fetch your data and process it into your own data type
6:43
16
Apollo GraphQL Part 3
Display the data fetched with Apollo GraphQL in your View
5:08
17
Configuration Files in Xcode
Create configuration files and add variables depending on the environment - development or production
4:35
18
App Review
Request an app review from your user for the AppStore
5:43
19
ImagePicker
Create an ImagePicker to choose a photo from the library or take a photo from the camera
5:06
20
Compress a UIImage
Compress a UIImage by converting it to JPEG, reducing its size and quality
3:32
21
Firebase Storage
Upload, delete and list files in Firebase Storage
11:11
22
Search Feature
Implement a search feature to filter through your content in your SwiftUI application
9:13
23
Push Notifications Part 1
Set up Firebase Cloud Messaging as a provider server to send push notifications to your users
5:59
24
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
25
Push Notifications Part 3
Tie everything together and test your push notifications feature in production
6:13
26
Network Connection
Verify the network connection of your user to perform tasks depending on their network's reachability
6:49
27
Download Files Locally Part 1
Download videos and files locally so users can watch them offline
6:05
28
Download Files Locally Part 2
Learn how to use the DownloadManager class in your views for offline video viewing
6:02
29
Offline Data with Realm
Save your SwiftUI data into a Realm so users can access them offline
10:20
30
HTTP Request with Async Await
Create an HTTP get request function using async await
6:11
31
Xcode Cloud
Automate workflows with Xcode Cloud
9:23
32
SceneStorage and TabView
Use @SceneStorage with TabView for better user experience on iPad
3:52
33
Network Connection Observer
Observe the network connection state using NWPathMonitor
4:37
34
Apollo GraphQL Caching
Cache data for offline availability with Apollo GraphQL
9:42
35
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
39
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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