ios SwiftUI Bluetooth 使用

import SwiftUI

import CoreBluetooth

class Bluetooth: NSObject, CBCentralManagerDelegate, ObservableObject {

@Published var bluetoothState = ""

@Published var devices: [String] = []

var centralManager: CBCentralManager!

func start() {

centralManager = CBCentralManager(delegate: self, queue: nil)

}

func centralManagerDidUpdateState(_ central: CBCentralManager) {

switch central.state {

case .unknown:

break

case .resetting: break

case .unsupported: break

case .unauthorized: break

case .poweredOff: break

case .poweredOn:

centralManager.scanForPeripherals(withServices: nil)

break

@unknown default: break

}

bluetoothState = "\(central.state)"

}

public func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {

print("\(peripheral)")

self.devices.append("\(peripheral)")

}

}

struct ContentView: View {

@ObservedObject var tooth = Bluetooth()

var body: some View {

VStack{

Text("状态:\(self.tooth.bluetoothState)")

Divider()

List{

ForEach(self.tooth.devices,id: \.self){ item in

Text("\(item)")

}

}

}.onAppear(){ //等同于 UIKit的 viewDidAppear()

self.tooth.start()

}

}

}

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