@Developer Tools Engineer
Thanks for reviewing my code.
I replaced your swift code for the ContentView. The iPhone simulator shows:
pheripherals count: 0
start list of peripherals
end list of peripherals
since it has no access to bluetooth, but the mac preview is not working, although it shows the right view if i run the app.
This is the whole project:
ContentView.swift
import SwiftUI
struct ContentView: View {
@ObservedObject private var central = BLECentral()
var body: some View {
VStack{
Text("pheripherals count: \(Array(central.discoveredPeripherals).count)")
Text("start list of peripherals")
ForEach(Array(central.discoveredPeripherals), id: \.key.identifier) { item in
HStack {
Text(item.key.name ?? "unnamed device")
Text("\(item.value)")
}
}
Text("end list of peripherals")
}
}
}
#Preview() {
ContentView()
}
BLECentral.swift
import Foundation
import CoreBluetooth
class BLECentral: NSObject, ObservableObject {
private var centralManager: CBCentralManager?
@Published var discoveredPeripherals: [CBPeripheral:NSNumber] = [:]
var onDiscovered: (()->Void)?
override init() {
super.init()
self.centralManager = CBCentralManager(delegate: self, queue: nil)
}
func scanForPeripherals(){
self.centralManager?.scanForPeripherals(withServices: nil)
}
}
extension BLECentral: CBCentralManagerDelegate {
func centralManagerDidUpdateState(_ central: CBCentralManager) {
switch central.state {
case .poweredOn:
scanForPeripherals()
case .poweredOff:
print("Bluetooth is powered off. Please turn it on to use this app.")
case .unauthorized:
print("This app is not authorized to use Bluetooth.")
case .unsupported:
print("Bluetooth is not supported on this device.")
case .resetting:
print("Bluetooth is resetting.")
case .unknown:
print("Bluetooth state is unknown.")
@unknown default:
print("A new state has come up which isn't handled yet.")
}
}
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi: NSNumber) {
if !discoveredPeripherals.keys.contains(peripheral){
self.discoveredPeripherals[peripheral] = rssi
onDiscovered?()
} else {
discoveredPeripherals[peripheral] = rssi
}
}
}
This was a multi-platform application with proper bluetooth and its related privacies added to the project.
mahdiaslanimk
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