fix(ios): correctly handle ble enabled behaviour

library/ios/BleDidcomm.swift

@@ -13,9 +13,8 @@ class BleDidcomm: React.RCTEventEmitter {
     resolve: RCTPromiseResolveBlock,
     reject _: RCTPromiseRejectBlock
   ) {
-      let cm = CBCentralManager(delegate: nil, queue: .main)
-      Thread.sleep(forTimeInterval: 0.05)
-      resolve(cm.state == .poweredOn)
+    let cm = CentralManager(sendEvent: self.sendEvent)
+    resolve(cm.centralManager.state == .poweredOn)
   }
 
   @objc func startPeripheral(
@@ -51,9 +50,9 @@ class BleDidcomm: React.RCTEventEmitter {
       return
     }
     peripheralManager.setService(
-        serviceUUID: serviceUUID,
-        writeCharacteristicUUID: writeCharacteristicUUID,
-        indicationCharacteristicUUID: indicationCharacteristicUUID)
+      serviceUUID: serviceUUID,
+      writeCharacteristicUUID: writeCharacteristicUUID,
+      indicationCharacteristicUUID: indicationCharacteristicUUID)
     resolve(nil)
 
   }
@@ -159,7 +158,7 @@ class BleDidcomm: React.RCTEventEmitter {
     } catch CentralManager.CentralManagerError.noDefinedService {
       reject("error", "Set the service before calling the scan function", nil)
     } catch {
-        reject("error", "unexpected error", nil)
+      reject("error", "unexpected error", nil)
     }
   }
 

library/ios/BleDidcommEventEmitter.swift

@@ -4,7 +4,8 @@ extension BleDidcomm {
   override open func supportedEvents() -> [String] {
     [
       "onDiscoverPeripheral", "onConnectedPeripheral", "onReceivedWriteWithoutResponse",
-      "onReceivedNotification", "onDisconnectedPeripheral", "onDisconnectedCentral", "onConnectedCentral"
+      "onReceivedNotification", "onDisconnectedPeripheral", "onDisconnectedCentral",
+      "onConnectedCentral",
     ]
   }
 }

library/ios/CentralManager.swift

@@ -10,7 +10,6 @@ class CentralManager: NSObject {
     case noDefinedService
   }
 
-  var isPoweredOn = false
   var serviceUUID: CBUUID?
   var writeCharacteristicUUID: CBUUID?
   var indicationCharacteristicUUID: CBUUID?
@@ -36,7 +35,7 @@ class CentralManager: NSObject {
       queue: .main
     )
 
-    while !isPoweredOn { Thread.sleep(forTimeInterval: 0.05) }
+    while centralManager.state == .unknown { Thread.sleep(forTimeInterval: 0.05) }
   }
 
   func shutdownCentral() {
@@ -85,8 +84,8 @@ class CentralManager: NSObject {
     }
 
     self.centralManager.scanForPeripherals(
-        withServices: [serviceUUID],
-        options: [CBCentralManagerScanOptionAllowDuplicatesKey: false])
+      withServices: [serviceUUID],
+      options: [CBCentralManagerScanOptionAllowDuplicatesKey: false])
 
   }
 

library/ios/CentralManagerDelegate.swift

@@ -3,14 +3,7 @@ import Foundation
 import os
 
 extension CentralManager: CBCentralManagerDelegate {
-    func centralManagerDidUpdateState(_ central: CBCentralManager) {
-        switch central.state {
-        case .poweredOn:
-            isPoweredOn = true
-        default:
-            os_log("Unknown state")
-        }
-    }
+  func centralManagerDidUpdateState(_ central: CBCentralManager) {}
 
   func centralManager(
     _: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData _: [String: Any],

library/ios/CentralManagerPeripheralDelegate.swift

@@ -44,7 +44,7 @@ extension CentralManager: CBPeripheralDelegate {
       peripheral.discoverCharacteristics(
         [
           writeCharacteristicUUID.unsafelyUnwrapped,
-          indicationCharacteristicUUID.unsafelyUnwrapped
+          indicationCharacteristicUUID.unsafelyUnwrapped,
         ], for: service)
     }
   }

library/ios/Constants.swift

@@ -1,5 +1,5 @@
 enum Constants {
-    /*  The number of bytes we adjust for in the chunking algorithm to account for the data header 
+  /*  The number of bytes we adjust for in the chunking algorithm to account for the data header
     (3 bytes) + 9 extra bytes to be sure = 12 bytes */
-    static let numberOfBytesForHeader: Int = 12
+  static let numberOfBytesForHeader: Int = 12
 }

library/ios/PeripheralManagerDelegate.swift

@@ -17,10 +17,11 @@ extension PeripheralManager: CBPeripheralManagerDelegate {
   }
 
   func peripheralManager(
-    _ peripheral: CBPeripheralManager, central: CBCentral, didUnsubscribeFrom characteristic: CBCharacteristic
+    _ peripheral: CBPeripheralManager, central: CBCentral,
+    didUnsubscribeFrom characteristic: CBCharacteristic
   ) {
     connectedCentral = nil
-    sendEvent("onDisconnectedCentral", ["identifier": central.identifier.uuidString ])
+    sendEvent("onDisconnectedCentral", ["identifier": central.identifier.uuidString])
   }
 
   func peripheralManager(
@@ -32,7 +33,7 @@ extension PeripheralManager: CBPeripheralManagerDelegate {
       os_log("Error already connected to a single central")
       return
     }
-    sendEvent("onConnectedCentral", ["identifier": central.identifier.uuidString ])
+    sendEvent("onConnectedCentral", ["identifier": central.identifier.uuidString])
     connectedCentral = central
   }