Question 420068 in IOS Swift Question posted in
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Ios swift – Is it possible to detect when the device is connected to Carplay?

I’m working on an app that does NOT support Carplay but I wonder if it’s possible to detect if the device is connected to Carplay so I can add some logic on top of it?

Any insights or documentations are greatly appreciated.

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2

Answers


  1. 0

    It is possible to detect when a device is connected to Carplay using the UIScreen class in iOS. Even though your app does not support Carplay, you can still detect the presence of a Carplay screen and take action based on that information.

    import UIKit

class CarPlayDetectionManager {

func startMonitoringForCarPlayConnection() {
    // Add observer for screen connection
    NotificationCenter.default.addObserver(self, selector: #selector(screenDidConnect), name: UIScreen.didConnectNotification, object: nil)
    // Add observer for screen disconnection
    NotificationCenter.default.addObserver(self, selector: #selector(screenDidDisconnect), name: UIScreen.didDisconnectNotification, object: nil)
    
    // Check if there are already any screens connected
    for screen in UIScreen.screens {
        if screen.traitCollection.userInterfaceIdiom == .carPlay {
            print("CarPlay screen already connected")
            handleCarPlayConnected(screen: screen)
        }
    }
}

@objc func screenDidConnect(notification: Notification) {
    if let newScreen = notification.object as? UIScreen {
        if newScreen.traitCollection.userInterfaceIdiom == .carPlay {
            print("CarPlay screen connected")
            handleCarPlayConnected(screen: newScreen)
        }
    }
}

@objc func screenDidDisconnect(notification: Notification) {
    if let disconnectedScreen = notification.object as? UIScreen {
        if disconnectedScreen.traitCollection.userInterfaceIdiom == .carPlay {
            print("CarPlay screen disconnected")
            handleCarPlayDisconnected(screen: disconnectedScreen)
        }
    }
}

func handleCarPlayConnected(screen: UIScreen) {
    // Add your custom logic when CarPlay is connected
}

func handleCarPlayDisconnected(screen: UIScreen) {
    // Add your custom logic when CarPlay is disconnected
}

func stopMonitoring() {
    NotificationCenter.default.removeObserver(self, name: UIScreen.didConnectNotification, object: nil)
    NotificationCenter.default.removeObserver(self, name: UIScreen.didDisconnectNotification, object: nil)
}

    }

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  2. 0

    Yes, you can detect if your phone is connected to CarPlay (without relaying on which screen is open in the application). You can use AVAudioSession to check what are the current audio inputs on the device. When you connect to CarPlay, you get a new audio input available which name is CarPlay. It works regardless the app state, whether it’s in the foreground or background.

    Here’s the example code:

    import AVFoundation

    func hasCarPlay() {
        let audioSession = AVAudioSession.sharedInstance()
        if let inputs = audioSession.availableInputs {
            for input in inputs {
                if input.portName == "CarPlay" || input.portType == .carAudio {
                    showAlertWithMessage(title: "CarPlay Available", message: "")
                    return
                }
            }
        }
    }
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