how to save and retrive cbperipheral in coredata and in swift

To save a CBPeripheral instance in Core Data, you can make it conform to the NSCoding protocol:


main.swift
class PeripheralObject: NSManagedObject, NSCoding {
    
    @NSManaged var macAddress: String?
    @NSManaged var name: String?

    func encode(with aCoder: NSCoder) {
        aCoder.encode(macAddress, forKey: "macAddress")
        aCoder.encode(name, forKey: "name")
    }

    required convenience init?(coder aDecoder: NSCoder) {
        let context = CoreDataStack.sharedInstance.persistentContainer.viewContext
        self.init(entity: PeripheralObject.entity(), insertInto: context)

        macAddress = aDecoder.decodeObject(forKey: "macAddress") as? String
        name = aDecoder.decodeObject(forKey: "name") as? String
    }
    
}
646 chars
20 lines

Now you can save the CBPeripheral object in Core Data by converting it to NSData and storing it in the PeripheralObject instance:


main.swift
let peripheralObject = PeripheralObject(context: context)
let data = NSKeyedArchiver.archivedData(withRootObject: peripheral)
peripheralObject.macAddress = peripheral.identifier.uuidString
peripheralObject.name = peripheral.name
peripheralObject.data = data

do {
    try context.save()
} catch let error as NSError {
    print("Could not save. \(error), \(error.userInfo)")
}
377 chars
12 lines

To retrieve the CBPeripheral instance, you can fetch the PeripheralObject from Core Data and deserialize the NSData back into a CBPeripheral:


main.swift
let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: "PeripheralObject")
fetchRequest.predicate = NSPredicate(format: "macAddress = %@", uuid.uuidString)

do {
    let results = try context.fetch(fetchRequest) as! [PeripheralObject]
    if let data = results.first?.data {
        let peripheral = NSKeyedUnarchiver.unarchiveObject(with: data) as! CBPeripheral
        return peripheral
    }
} catch let error as NSError {
    print("Could not fetch. \(error), \(error.userInfo)")
}

return nil
511 chars
15 lines

similar swift code snippets

how to save cbperipheral in coredata in swift

remove duplicates in coredata in swift

remove existing record from coredata in swift

remove duplicates in coredata and automatically update in tableview in swift

core data in swift

core data crud in swift

store a string to core data in swift

sort a list of people by name in swift

how do you determine if a string is a palindrome in swift

hello world in swift

related categories