how to save cbperipheral in coredata in swift

To save CBPeripheral object in CoreData, you need to follow some steps:

Create a new CoreData entity with an attribute of type Transformable. This attribute will hold the CBPeripheral object.
Convert the CBPeripheral object to NSData.
Save the NSData object to the Transformable attribute of the CoreData entity.

Here's the code to achieve this:


main.swift
// Assuming you have a reference to the `CBPeripheral` object
let peripheralData = NSKeyedArchiver.archivedData(withRootObject: peripheral)

// Assuming you have a reference to the `ManagedContext` instance from CoreData 
let entity = NSEntityDescription.entity(forEntityName: "PeripheralEntity", in: managedContext)!
let peripheralEntity = NSManagedObject(entity: entity, insertInto: managedContext)

// Assuming `peripheralEntity` has an attribute named `peripheralData` of type `Transformable`.
peripheralEntity.setValue(peripheralData, forKey: "peripheralData")

do {
    try managedContext.save()
} catch let error as NSError {
    print("Could not save. \(error), \(error.userInfo)")
}
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To fetch and use the CBPeripheral object from CoreData, you need to reverse the steps:

Fetch the NSData object from the CoreData entity's attribute.
Use NSKeyedUnarchiver to convert NSData to CBPeripheral.

Here's the code to achieve this:


main.swift
// Assuming you fetch the `PeripheralEntity` object from CoreData 
let peripheralData = peripheralEntity.value(forKey: "peripheralData")

if let data = peripheralData as? NSData {
    let peripheral = NSKeyedUnarchiver.unarchiveObject(with: data as Data) as! CBPeripheral
    // Use the `peripheral` object as needed.
} else {
    print("Could not fetch `peripheralData` from CoreData.")
}
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Note:

Make sure to import CoreData and CoreBluetooth frameworks.
This approach only saves the state of the CBPeripheral object. It does not save the connection or pairing status.

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