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# bluetoothPeripherals

A key indicating that the app should continue actions associated with its Bluetooth peripheral objects.

```
static let bluetoothPeripherals: UIApplication.LaunchOptionsKey
```

## Discussion

The presence of this key indicates that the app previously had one or more <doc://com.apple.documentation/documentation/CoreBluetooth/CBPeripheralManager> objects and was relaunched by the Bluetooth system to continue actions associated with those objects. The value of this key is an <doc://com.apple.documentation/documentation/Foundation/NSArray> object containing one or more <doc://com.apple.documentation/documentation/Foundation/NSString> objects.

Each string in the array represents the restoration identifier for a peripheral manager object. This is the same string you assigned to the <doc://com.apple.documentation/documentation/CoreBluetooth/CBPeripheralManagerOptionRestoreIdentifierKey> key when you initialized the peripheral manager object previously. The system provides the restoration identifiers only for peripheral managers that had published or advertised services.

---

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