Detect headset button click on iPhone SDK

Question

Is there a way to detect the headset\'s play/pause button click?

I managed to detect the volume buttons clicks using:

AudioSessionAddPropertyListener         


        

Answer 1

Can's answer was good, but I think it's outdated.

Now you need to subclass UIApplication.

code for main.m

#import 
#import "AppDelegate.h"
#import "MyUIApplication.h"

int main(int argc, char * argv[]) {
  @autoreleasepool {
    return UIApplicationMain(
      argc,
      argv,
      NSStringFromClass([MyUIApplication class]),
      NSStringFromClass([AppDelegate class]));
  }
}

Code for MyUIApplication.m:

@implementation MyUIApplication
- (void)sendEvent:(UIEvent *)event {
  if (event.type == UIEventTypeRemoteControl) {
    // Check event.subtype to see if it's a single click, double click, etc.
  } else {
    // Not my problem.
    [super sendEvent:event];
  }
}
@end

Code for AppDelegate.m:

inside of - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

call [application beginReceivingRemoteControlEvents];