Introduction
Welcome to the documentation for PusherSwift, the Swift library for interacting with the Pusher real-time messaging service. PusherSwift allows you to easily build real-time features into your Swift applications, by providing real-time data synchronization, event streaming, and instant messaging capabilities.
Installation
To install PusherSwift, you can use CocoaPods, a dependency manager for Swift and Objective-C projects. You can install CocoaPods by following the official CocoaPods Getting Started guide.
Installing PusherSwift
Once you have CocoaPods set up, you can install PusherSwift by adding it to your project’s Podfile:
# Podfile
use_frameworks!
target 'YourApp' do
pod 'PusherSwift'
end
Then, in your terminal, run the following command:
pod install
Basic Usage
In this section, we will cover the basic usage of PusherSwift. Let’s start with setting up your Pusher object and connecting to the Pusher service.
Setting up Pusher
To interact with the Pusher service, you will need to create a Pusher instance by providing your Pusher app’s key. Here’s an example:
import PusherSwift
let pusher = Pusher(key: "YOUR_APP_KEY")
Replace “YOUR_APP_KEY” with your actual Pusher app key.
Connecting to Pusher
Once you have your Pusher instance set up, you can connect to the Pusher service using the `connect` method:
pusher.connect()
Channels
Channels in PusherSwift represent the communication channels that are used to send and receive events. Channels can be either public or private, and you can subscribe to them to start listening for events.
Subscribing to a Public Channel
To subscribe to a public channel, use the `subscribe` method on your Pusher instance:
let channel = pusher.subscribe("my-channel")
Replace “my-channel” with the name of your desired channel.
Subscribing to a Private Channel
To subscribe to a private channel, you will need to authenticate. Let’s see how you can authenticate and subscribe to a private channel:
let auth = PusherAuth(authEndpoint: "http://your-auth-endpoint.com/auth")
pusher.authenticate(
channelName: "private-channel",
socketID: "YOUR_SOCKET_ID",
customAuthData: ["user_id": "123"]
) { data, error in
if let error = error {
print(error.localizedDescription)
} else {
let channel = pusher.subscribe(name: "private-channel", auth: auth)
}
}
Replace “http://your-auth-endpoint.com/auth” with your actual authentication endpoint, “private-channel” with the name of your desired private channel, and “YOUR_SOCKET_ID” with your socket ID. Adjust the `customAuthData` dictionary as per your authentication requirements.
Events
Events are the messages that are sent and received over channels. In this section, we will learn how to bind to events and handle received events.
Binding to Events
To bind to an event on a channel, you can use the `bind` method on your channel instance:
channel.bind(eventName: "my-event") { event in
print("\(event.channel): \(event.eventName) -> \(event.data)")
}
Replace “my-event” with the name of your desired event. In the above example, we simply print the received event information, but you can perform any custom logic based on the event content.
Conclusion
Congratulations! You now have a basic understanding of how to use the PusherSwift library to interact with the Pusher real-time messaging service in your Swift applications. For more information and advanced usage, please refer to the official PusherSwift documentation and the Pusher website.