---
title: "init(applicationService:)"
framework: network
role: symbol
role_heading: Initializer
path: "network/nwlistener/service-swift.struct/init(applicationservice:)"
---

# init(applicationService:)

Creates a listener for apps that listen for connections from a network device picker.

## Declaration

```swift
init(applicationService: String)
```

## Parameters

- `applicationService`: The name of the application service. This must match the name passed to the network device picker.

## Discussion

Discussion Use this initializer to setup a listener for application services. Apps that register as advertising an application service should always have a listener waiting for a local connection. The system launches your app when the user selects the current device in a DevicePicker or DDDevicePickerViewController. Create the listener as soon as your app launches, so that your app can connect with the requesting device.