We are working on a command line daemon (started with launchd) for a UI to communicate with using XPC. The functions we have been using so far work correctly, but they only take arguments and return void.
We wanted to add a function with a simple reply block to see if the daemon is running or not, and we may need to get data back in the future. But it is not working.
For example, this is working:
if let proxy = connectionToService.remoteObjectProxyWithErrorHandler({ error in
print(error.localizedDescription)
}) as? TheDaemonProtocol {
proxy.doStuff("Test string")
}
But this returns an error "Couldn’t communicate with a helper application."
if let proxy = connectionToService.remoteObjectProxyWithErrorHandler({ error in
print(error.localizedDescription)
}) as? TheDaemonProtocol {
proxy.isUp { reply in
print("reply: \(reply)")
}
}
isUp() is coded to only return true for now.
@objc func isUp(reply: @escaping (Bool) -> Void) {
reply(true)
}
TIA for any help!