之前介紹過如何搜尋藍芽裝置 （請參考搜尋藍芽裝置）
接下來我們使用 Dictionary 來記錄搜尋到的裝置
Step 1: 新增Class BtDevice 來存放裝置資訊
BtDevice.swift1
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| import Foundation
struct BtDevice {
var uuid: String!;
var name: String?;
}
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Step 2: Create Dictionary
使用 Bluetooth UUID 當作 Key
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| var mFoundDevices : Dictionary<String , BtDevice>!;
mFoundDevices = [String : BtDevice]();
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Step 3: 將發現的裝置存放在Dictionary
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| func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral:
CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber) {
print("Device: \(peripheral.name) : \(peripheral.identifier.UUIDString)");
let btUuid = peripheral.identifier.UUIDString;
let btName = peripheral.name
let btDevice = BtDevice(uuid: btUuid, name: btName);
mFoundDevices[btUuid] = btDevice;
}
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Step 4: 過濾已發現的裝置
由於搜尋藍芽裝置時，可能會搜尋到重複的裝置，所以我們需要先過濾此裝置是否已被搜尋過. 若是還未搜尋到的裝置再加入Dictionary中.
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| func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber) {
print("Device: \(peripheral.name) : \(peripheral.identifier.UUIDString)");
if (!isAlreadyFound(peripheral.identifier.UUIDString)) {
insertFoundDevice(peripheral.identifier.UUIDString, newName: peripheral.name);
} else {
print("This Device is discovered: \(peripheral.identifier.UUIDString)");
}
}
internal func isAlreadyFound(uuid : String!) -> Bool {
return mFoundDevices[uuid] != nil;
}
internal func insertFoundDevice(newUuid: String!, newName: String?) {
let btDevice = BtDevice(uuid: newUuid, name: newName);
mFoundDevices[newUuid] = btDevice;
}
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Step 5: 清空 Dictionary
在搜尋前, 我們也必須先清空搜尋過的資料.
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| mFoundDevices.removeAll();
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Source Code
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| import Foundation
import CoreBluetooth
class BtManager : NSObject {
var mCBCentralManager: CBCentralManager!
var mFoundDevices : Dictionary<String , BtDevice>!;
override init() {
super.init();
initCBCentralManager();
mFoundDevices = [String : BtDevice]();
}
internal func initCBCentralManager() {
mCBCentralManager = CBCentralManager(delegate: self, queue: nil, options: [CBCentralManagerOptionShowPowerAlertKey: true]);
}
func isScanning() -> Bool {
return mCBCentralManager.isScanning;
}
func startToScan() {
if (mCBCentralManager.state == CBCentralManagerState.PoweredOff) {
print("state is off");
initCBCentralManager();
} else {
if (isScanning()) {
print("state is scanning");
} else {
clearAllFoundDevices();
mCBCentralManager.scanForPeripheralsWithServices(nil, options: nil);
print("start to scan: \(isScanning())");
}
}
}
func stopScanning() {
mCBCentralManager.stopScan();
}
}
extension BtManager : CBCentralManagerDelegate {
func centralManagerDidUpdateState(central: CBCentralManager) {
switch (central.state) {
case CBCentralManagerState.PoweredOn:
print("state On");
case CBCentralManagerState.PoweredOff:
print("state Off");
case CBCentralManagerState.Unknown:
fallthrough;
default:
print("state Unknow");
}
}
func centralManager(central: CBCentralManager, didDiscoverPeripheral peripheral: CBPeripheral, advertisementData: [String : AnyObject], RSSI: NSNumber) {
print("Device: \(peripheral.name) : \(peripheral.identifier.UUIDString)");
if (!isAlreadyFound(peripheral.identifier.UUIDString)) {
insertFoundDevice(peripheral.identifier.UUIDString, newName: peripheral.name);
} else {
print("This Device is discovered: \(peripheral.identifier.UUIDString)");
}
}
internal func isAlreadyFound(uuid : String!) -> Bool {
return mFoundDevices[uuid] != nil;
}
internal func insertFoundDevice(newUuid: String!, newName: String?) {
let btDevice = BtDevice(uuid: newUuid, name: newName);
mFoundDevices[newUuid] = btDevice;
}
internal func clearAllFoundDevices() {
mFoundDevices.removeAll();
}
}
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