Play audio if headset is plugged-in [duplicate] - iphone

Question

Is it possible to detect that the user has an external headset plugged into the iPhone's 3.5mm connector or the 30-pin connector? I want to output audio only to an external audio device, and keep silent if nothing is connected.

Answer 1

The answer is very similar to the answer to this question, but you'll want to get the kAudioSessionProperty_AudioRoute property instead.

Answer 2

Call this method to find out the bluetooth headset is connected or not.
First import this framework #import <AVFoundation/AVFoundation.h>
- (BOOL) isBluetoothHeadsetConnected
{
AVAudioSession *session = [AVAudioSession sharedInstance];
AVAudioSessionRouteDescription *routeDescription = [session currentRoute];
NSLog(#"Current Routes : %#", routeDescription);
if (routeDescription)
{
NSArray *outputs = [routeDescription outputs];
if (outputs && [outputs count] > 0)
{
AVAudioSessionPortDescription *portDescription = [outputs objectAtIndex:0];
NSString *portType = [portDescription portType];
NSLog(#"dataSourceName : %#", portType);
if (portType && [portType isEqualToString:#"BluetoothA2DPOutput"])
{
return YES;
}
}
}
return NO;
}

Answer 3

There is nice article about this in Apple documentation:
https://developer.apple.com/documentation/avfoundation/avaudiosession/responding_to_audio_session_route_changes
Only you have to verify if portType == AVAudioSessionPortBluetoothA2DP
func setupNotifications() {
let notificationCenter = NotificationCenter.default
notificationCenter.addObserver(self,
selector: #selector(handleRouteChange),
name: .AVAudioSessionRouteChange,
object: nil)
}
#objc func handleRouteChange(notification: Notification) {
guard let userInfo = notification.userInfo,
let reasonValue = userInfo[AVAudioSessionRouteChangeReasonKey] as? UInt,
let reason = AVAudioSessionRouteChangeReason(rawValue:reasonValue) else {
return
}
switch reason {
case .newDeviceAvailable:
let session = AVAudioSession.sharedInstance()
for output in session.currentRoute.outputs where output.portType == AVAudioSessionPortBluetoothA2DP {
headsetConnected = true
break
}
case .oldDeviceUnavailable:
if let previousRoute =
userInfo[AVAudioSessionRouteChangePreviousRouteKey] as? AVAudioSessionRouteDescription {
for output in previousRoute.outputs where output.portType == AVAudioSessionPortBluetoothA2DP {
headsetConnected = false
break
}
}
default: ()
}
}
func isBluetoothHeadsetConnected() -> Bool {
var result = false
let session = AVAudioSession.sharedInstance()
for output in session.currentRoute.outputs where output.portType == AVAudioSessionPortBluetoothA2DP {
result = true
}
return result
}