---
title: "setDevicePickerCompletionHandler:"
framework: devicediscoveryui
role: symbol
role_heading: Instance Method
path: "devicediscoveryui/dddevicepickerviewcontroller/setdevicepickercompletionhandler:"
---

# setDevicePickerCompletionHandler:

Sets the completion handler that the system calls when the user selects a device from the picker view.

## Declaration

```occ
- (void) setDevicePickerCompletionHandler:(void (^)(nw_endpoint_t endpoint, nw_error_t error)) devicePickerCompletionHandler;
```

## Parameters

- `devicePickerCompletionHandler`: A block that the system calls after the user selects a device.

## Mentioned in

Connecting a tvOS app to other devices over the local network

## Discussion

Discussion The system calls this block after the user selects a device from the endpoint picker view. If the user cancels the view, the picker silently closes. // This example uses the default application services parameters; // however, you can add a NWProtocolFramer to provide application-level // messaging. nw_browse_descriptor_t browseDescriptor = nw_browse_descriptor_create_application_service("MyAppService");

nw_parameters_t parameters = nw_parameters_create();

// Create the view controller for the endpoint picker. NWEndpointPickerViewController *endpointPickerViewController = [[NWEndpointPickerViewController alloc] initWithBrowseDescriptor:browseDescriptor parameters: parameters];

// Set the endpoint picker handler. [endpointPickerViewController setEndpointPickerCompletionHandler:^(nw_endpoint_t  _Nullable endpoint, nw_error_t  _Nullable error) {     // Connect to the endpoint here.     [self.myConnectionController connectToEndpoint: endpoint]; }];

// Show the network device picker as a full-screen, modal view. [self presentViewController:endpointPickerViewController animated:YES completion:nil];