Swift语言iOS8的蓝牙Bluetooth解析
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时间：2015年06月11日
开发中央步骤：
1.添加CoreBluetooth.framework框架到你的工程
2.继承两个协议：CBCentralManagerDelegate和CBPeripheralDelegate
个人写的demo，有详细注释。看不懂的在提出来，这里就不做过多的解释了。
1 // 2 // ViewController.swift 3 // CoreBluetooth 4 // 5 // Created by fanviwa on 15/4/23. 6 // Copyright (c) 2015年 fanviwa. All rights reserved. 7 // 8 9 import UIKit 10 11 class ViewController: UIViewController, CBCentralManagerDelegate, CBPeripheralDelegate { 12 13 @IBOutlet weak var tableView: UITableView! 14 15 //添加属性 16 var manager: CBCentralManager! 17 var peripheral: CBPeripheral! 18 var writeCharacteristic: CBCharacteristic! 19 //保存收到的蓝牙设备 20 var deviceList:NSMutableArray = NSMutableArray() 21 //服务和特征的UUID 22 let kServiceUUID = [CBUUID(string:"FFE0")] 23 let kCharacteristicUUID = [CBUUID(string:"FFE1")] 24 25 override func viewDidLoad() { 26 super.viewDidLoad() 27 //1.创建一个中央对象 28 self.manager = CBCentralManager(delegate: self, queue: nil) 29 } 30 31 //2.检查运行这个App的设备是不是支持BLE。代理方法 32 func centralManagerDidUpdateState(central: CBCentralManager){ 33 switch central.state { 34 case CBCentralManagerState.PoweredOn: 35 //扫描周边蓝牙外设. 36 //写nil表示扫描所有蓝牙外设，如果传上面的kServiceUUID,那么只能扫描出FFEO这个服务的外设。 37 //CBCentralManagerScanOptionAllowDuplicatesKey为true表示允许扫到重名，false表示不扫描重名的。 38 self.manager.scanForPeripheralsWithServices(kServiceUUID, options:[CBCentralManagerScanOptionAllowDuplicatesKey: false]) 39 println("蓝牙已打开,请扫描外设") 40 case CBCentralManagerState.Unauthorized: 41 println("这个应用程序是无权使用蓝牙低功耗") 42 case CBCentralManagerState.PoweredOff: 43 println("蓝牙目前已关闭") 44 default: 45 println("中央管理器没有改变状态") 46 } 47 } 48 49 //3.查到外设后，停止扫描，连接设备 50 //广播、扫描的响应数据保存在advertisementData 中，可以通过CBAdvertisementData 来访问它。 51 func centralManager(central: CBCentralManager!, didDiscoverPeripheral peripheral: CBPeripheral!, advertisementData: [NSObject : AnyObject]!, RSSI : NSNumber!){ 52 if(!self.deviceList.containsObject(peripheral)){ 53 self.deviceList.addObject(peripheral) 54 } 55 self.tableView.reloadData() 56 } 57 58 //4.连接外设成功，开始发现服务 59 func centralManager(central: CBCentralManager!, didConnectPeripheral peripheral: CBPeripheral!){ 60 //停止扫描外设 61 self.manager.stopScan() 62 self.peripheral = peripheral 63 self.peripheral.delegate = self 64 self.peripheral.discoverServices(nil) 65 66 } 67 68 //连接外设失败 69 func centralManager(central: CBCentralManager!, didFailToConnectPeripheral peripheral: CBPeripheral!, error: NSError!){ 70 println("连接外设失败===\(error)") 71 } 72 73 //5.请求周边去寻找它的服务所列出的特征 74 func peripheral(peripheral: CBPeripheral!, didDiscoverServices error: NSError!){ 75 if error != nil { 76 println("错误的服务特征:\(error.localizedDescription)") 77 return 78 } 79 var i: Int = 0 80 for service in peripheral.services { 81 println("服务的UUID:\(service.UUID)") 82 i++ 83 //发现给定格式的服务的特性 84 // if (service.UUID == CBUUID(string:"FFE0")) { 85 // peripheral.discoverCharacteristics(kCharacteristicUUID, forService: service as CBService) 86 // } 87 peripheral.discoverCharacteristics(nil, forService: service as! CBService) 88 } 89 } 90 91 //6.已搜索到Characteristics 92 func peripheral(peripheral: CBPeripheral!, didDiscoverCharacteristicsForService service: CBService!, error: NSError!){ 93 //println("发现特征的服务:\(service.UUID.data) == 服务UUID:\(service.UUID)") 94 if (error != nil){ 95 println("发现错误的特征：\(error.localizedDescription)") 96 return 97 } 98 99 for characteristic in service.characteristics { 100 //罗列出所有特性，看哪些是notify方式的，哪些是read方式的，哪些是可写入的。 101 println("服务UUID:\(service.UUID) 特征UUID:\(characteristic.UUID)") 102 //特征的值被更新，用setNotifyValue:forCharacteristic 103 switch characteristic.UUID.description { 104 case "FFE1": 105 //如果以通知的形式读取数据，则直接发到didUpdateValueForCharacteristic方法处理数据。 106 self.peripheral.setNotifyValue(true, forCharacteristic: characteristic as! CBCharacteristic) 107 108 case "2A37": 109 //通知关闭，read方式接受数据。则先发送到didUpdateNotificationStateForCharacteristic方法，再通过readValueForCharacteristic发到didUpdateValueForCharacteristic方法处理数据。 110 self.peripheral.readValueForCharacteristic(characteristic as! CBCharacteristic) 111 112 case "2A38": 113 self.peripheral.readValueForCharacteristic(characteristic as! CBCharacteristic) 114 115 case "Battery Level": 116 self.peripheral.setNotifyValue(true, forCharacteristic: characteristic as! CBCharacteristic) 117 118 case "Manufacturer Name String": 119 self.peripheral.readValueForCharacteristic(characteristic as! CBCharacteristic) 120 121 case "6E400003-B5A3-F393-E0A9-E50E24DCCA9E": 122 self.peripheral.setNotifyValue(true, forCharacteristic: characteristic as! CBCharacteristic) 123 124 case "6E400002-B5A3-F393-E0A9-E50E24DCCA9E": 125 self.peripheral.readValueForCharacteristic(characteristic as! CBCharacteristic) 126 self.writeCharacteristic = characteristic as! CBCharacteristic 127 let heartRate: NSString = "ZhuHai XY" 128 let dataValue: NSData = heartRate.dataUsingEncoding(NSUTF8StringEncoding)! 129 //写入数据 130 self.writeValue(service.UUID.description, characteristicUUID: characteristic.UUID.description, peripheral: self.peripheral, data: dataValue) 131 132 default: 133 break 134 } 135 } 136 } 137 138 //8.获取外设发来的数据，不论是read和notify,获取数据都是从这个方法中读取。 139 func peripheral(peripheral: CBPeripheral!, didUpdateValueForCharacteristic characteristic: CBCharacteristic!, error: NSError!){ 140 if(error != nil){ 141 println("发送数据错误的特性是：\(characteristic.UUID) 错误信息：\(error.localizedDescription) 错误数据：\(characteristic.value)") 142 return 143 } 144 145 146 147 switch characteristic.UUID.description { 148 case "FFE1": 149 println("=\(characteristic.UUID)特征发来的数据是:\(characteristic.value)=") 150 151 case "2A37": 152 println("=\(characteristic.UUID.description):\(characteristic.value)=") 153 154 case "2A38": 155 var dataValue: Int = 0 156 characteristic.value.getBytes(&dataValue, range:NSRange(location: 0, length: 1)) 157 println("2A38的值为:\(dataValue)") 158 159 case "Battery Level":
//如果发过来的是Byte值，在Objective-C中直接.getBytes就是Byte数组了，在swift目前就用这个方法处理吧！ 160 var batteryLevel: Int = 0 161 characteristic.value.getBytes(&batteryLevel, range:NSRange(location: 0, length: 1)) 162 println("当前为你检测了\(batteryLevel)秒！") 163 164 case "Manufacturer Name String":
//如果发过来的是字符串，则用NSData和NSString转换函数 165 let manufacturerName: NSString = NSString(data: characteristic.value, encoding: NSUTF8StringEncoding)! 166 println("制造商名称为:\(manufacturerName)") 167 168 case "6E400003-B5A3-F393-E0A9-E50E24DCCA9E": 169 println("=\(characteristic.UUID)特征发来的数据是:\(characteristic.value)=") 170 171 case "6E400002-B5A3-F393-E0A9-E50E24DCCA9E": 172 println("返回的数据是:\(characteristic.value)") 173 174 default: 175 break 176 } 177 } 178 179 //7.这个是接收蓝牙通知，很少用。读取外设数据主要用上面那个方法didUpdateValueForCharacteristic。 180 func peripheral(peripheral: CBPeripheral!, didUpdateNotificationStateForCharacteristic characteristic: CBCharacteristic!, error: NSError!){ 181 if error != nil { 182 println("更改通知状态错误：\(error.localizedDescription)") 183 } 184 185 println("收到的特性数据：\(characteristic.value)") 186 //如果它不是传输特性,退出. 187 // if characteristic.UUID.isEqual(kCharacteristicUUID) { 188 // return 189 // } 190 //开始通知 191 if characteristic.isNotifying { 192 println("开始的通知\(characteristic)") 193 peripheral.readValueForCharacteristic(characteristic) 194 }else{ 195 //通知已停止 196 //所有外设断开 197 println("通知\(characteristic)已停止设备断开连接") 198 self.manager.cancelPeripheralConnection(self.peripheral) 199 } 200 } 201 202 //写入数据 203 func writeValue(serviceUUID: String, characteristicUUID: String, peripheral: CBPeripheral!, data: NSData!){ 204 peripheral.writeValue(data, forCharacteristic: self.writeCharacteristic, type: CBCharacteristicWriteType.WithResponse) 205 println("手机向蓝牙发送的数据为:\(data)") 206 } 207 //用于检测中心向外设写数据是否成功 208 func peripheral(peripheral: CBPeripheral!, didWriteValueForCharacteristic characteristic: CBCharacteristic!, error: NSError!) { 209 if(error != nil){ 210 println("发送数据失败!error信息:\(error)") 211 }else{ 212 println("发送数据成功\(characteristic)") 213 } 214 } 215 216 func numberOfSectionsInTableView(tableView: UITableView) -> Int { 217 // #warning Potentially incomplete method implementation. 218 // Return the number of sections. 219 return 1 220 } 221 222 func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 223 // #warning Incomplete method implementation. 224 // Return the number of rows in the section. 225 return self.deviceList.count 226 } 227 228 229 func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 230 //PCell,确定单元格的样式 231 let cell = tableView.dequeueReusableCellWithIdentifier("FhrCell", forIndexPath: indexPath) as! UITableViewCell 232 var device:CBPeripheral=self.deviceList.objectAtIndex(indexPath.row) as! CBPeripheral 233 //主标题 234 cell.textLabel?.text = device.name 235 //副标题 236 cell.detailTextLabel?.text = device.identifier.UUIDString 237 return cell 238 } 239 240 //通过选择来连接和断开外设 241 func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { 242 if(self.peripheralList.containsObject(self.deviceList.objectAtIndex(indexPath.row))){ 243 self.manager.cancelPeripheralConnection(self.deviceList.objectAtIndex(indexPath.row) as! CBPeripheral) 244 self.peripheralList.removeObject(self.deviceList.objectAtIndex(indexPath.row)) 245 println("蓝牙已断开！") 246 }else{ 247 self.manager.connectPeripheral(self.deviceList.objectAtIndex(indexPath.row) as! CBPeripheral, options: nil) 248 self.peripheralList.addObject(self.deviceList.objectAtIndex(indexPath.row)) 249 println("蓝牙已连接！ \(self.peripheralList.count)") 250 } 251 } 252 253 }
注意:
查看特性以什么方式读取，就看每个Characteristic的notifying属性值，NO说明read方式，YES说明notifying通知方式
<CBCharacteristic: 0x17008a0f0, UUID = 6E400003-B5A3-F393-E0A9-E50E24DCCA9E, properties = 0x10, value = (null), notifying = YES>
下面是properties的具体解释：
SWIFT struct CBCharacteristicProperties : RawOptionSetType { init(_ value: UInt) var value: UInt static var Broadcast: CBCharacteristicProperties { get } static var Read: CBCharacteristicProperties { get } static var WriteWithoutResponse: CBCharacteristicProperties { get } static var Write: CBCharacteristicProperties { get } static var Notify: CBCharacteristicProperties { get } static var Indicate: CBCharacteristicProperties { get } static var AuthenticatedSignedWrites: CBCharacteristicProperties { get } static var ExtendedProperties: CBCharacteristicProperties { get } static var NotifyEncryptionRequired: CBCharacteristicProperties { get } static var IndicateEncryptionRequired: CBCharacteristicProperties { get } } OBJECTIVE-C typedef enum { CBCharacteristicPropertyBroadcast = 0x01, CBCharacteristicPropertyRead = 0x02, CBCharacteristicPropertyWriteWithoutResponse = 0x04, CBCharacteristicPropertyWrite = 0x08, CBCharacteristicPropertyNotify = 0x10, CBCharacteristicPropertyIndicate = 0x20, CBCharacteristicPropertyAuthenticatedSignedWrites = 0x40, CBCharacteristicPropertyExtendedProperties = 0x80, CBCharacteristicPropertyNotifyEncryptionRequired = 0x100, CBCharacteristicPropertyIndicateEncryptionRequired = 0x200, } CBCharacteristicProperties;
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