`//
// ViewController.swift
// ble
//
// Created by 千秋万代 on 2018/3/26.
// Copyright © 2018年 Leehom. All rights reserved.
//
import UIKit
importCoreBluetooth
class ViewController: UIViewController, CBCentralManagerDelegate, CBPeripheralDelegate {
fileprivatevarcentralManager:CBCentralManager?
fileprivatevarperipheral:CBPeripheral?
fileprivatevarcharacteristicTx:CBCharacteristic?
fileprivatevarcharacteristicRx:CBCharacteristic?
fileprivatevardiscoveredPeripheralsArr: [CBPeripheral]?
fileprivatevarwriteCharacteristic:CBCharacteristic?
//指定服务UUID
fileprivateletuuid:CBUUID=CBUUID.init(string:"FFF0")
overridefuncviewDidLoad() {
super.viewDidLoad()
//按钮发送数据
letbtn =UIButton(frame:CGRect(x:120, y:200, width:160, height:40))
btn.setTitleColor(UIColor.red, for: .normal)
btn.setTitle("发送数据", for: .normal)
btn.addTarget(self, action:#selector(btnAction), for: .touchUpInside)
self.view.addSubview(btn)
//初始化并设置代理
self.centralManager=CBCentralManager.init(delegate:self, queue:DispatchQueue.main)
}
@objc fileprivate func btnAction() {
varSECRETKEY:String="938E0400080410"
letgetbytes: [UInt8] = [0x93,0x8e,0x04,0x00,0x08,0x04,0x10]
self.writeToPeripheral(bytes: getbytes)
}
funccentralManagerDidUpdateState(_central:CBCentralManager) {
switchcentral.state{
case.unknown:
print("CBCentralManagerStateUnknown")
case.resetting:
print("CBCentralManagerStateResetting")
case .unsupported:
print("CBCentralManagerStateUnsupported")
case .unauthorized:
print("CBCentralManagerStateUnauthorized")
case.poweredOff:
print("CBCentralManagerStatePoweredOff")
//查看蓝牙状态，开启则搜索外设
case.poweredOn:
print("CBCentralManagerStatePoweredOn")
//蓝牙打开，开始扫描
//第一个参数类型为CBUUID 的数组，可以通过UUID来筛选设备,传nill扫描周围所有设备
self.centralManager?.scanForPeripherals(withServices: [self.uuid], options:nil)
}
}
//找到设备就会调用如下方法
funccentralManager(_central:CBCentralManager, didDiscover peripheral:CBPeripheral, advertisementData: [String:Any], rssi RSSI:NSNumber) {
print(peripheral)
//这里自己去设置下连接规则
//找到服务后进行连接，并设置代理。
if ((peripheral.name?.contains("HelloWorld"))!){
// 找到的设备必须持有它，否则CBCentralManager中也不会保存peripheral，那么CBPeripheralDelegate中的方法也不会被调用！！
self.discoveredPeripheralsArr?.append(peripheral)
self.centralManager= central
self.peripheral= peripheral
central.connect(self.peripheral!, options:nil)
}
}
//已连接代理
funccentralManager(_central:CBCentralManager, didConnect peripheral:CBPeripheral) {
print("已连接")
//停止扫描
self.centralManager?.stopScan()
//先设置代理
peripheral.delegate=self
//然后外设查找service
peripheral.discoverServices(nil)
self.title= peripheral.name
}
//连接失败
funccentralManager(_central:CBCentralManager, didFailToConnect peripheral:CBPeripheral, error:Error?) {
print("连接失败")
}
funcperipheral(_peripheral:CBPeripheral, didDiscoverServices error:Error?) {
iferror !=nil{
print("查找services\(String(describing: peripheral.name))报错\(String(describing: error?.localizedDescription))")
}
forserviceinperipheral.services! {
//需要连接的服务CBCharacteristic的UUID
//此处uuid等于180A和FFF0
ifservice.uuid.uuidString=="FFF0"{
//查找特征
peripheral.discoverCharacteristics(nil, for: service)
}
}
}
funcperipheral(_peripheral:CBPeripheral, didDiscoverCharacteristicsFor service:CBService, error:Error?) {
iferror !=nil{
print("查找Characteristics\(String(describing: peripheral.name))报错\(String(describing: error?.localizedDescription))")
}
forcinservice.characteristics! {
ifc.uuid.uuidString=="FFF1"{
print("write")
self.writeCharacteristic= c
}
ifc.uuid.uuidString=="FFF4"{
print("read")
peripheral.setNotifyValue(true, for: c)
}
}
}
//写入后回调
funcperipheral(_peripheral:CBPeripheral, didWriteValueFor characteristic:CBCharacteristic, error:Error?) {
print("数据写完")
}
//设置特征为正在监听，读取数据
funcperipheral(_peripheral:CBPeripheral, didUpdateNotificationStateFor characteristic:CBCharacteristic, error:Error?) {
iferror !=nil{
print((error?.localizedDescription)!)
}
ifcharacteristic.isNotifying{
peripheral.readValue(for: characteristic)
print(characteristic.uuid.uuidString)
}
}
//获取外设数据
funcperipheral(_peripheral:CBPeripheral, didUpdateValueFor characteristic:CBCharacteristic, error:Error?) {
ifcharacteristic.uuid.uuidString=="FFF4"{
// let data:NSData = characteristic.value!
// print(data)
// let d = Array(UnsafeBufferPointer(start: UnsafePointer(data.bytes), count: data.length))
// print(d)
//
// let s:String = HexUtil.encodeToString(d)
// if s != "00" {
// result += s
// print(result )
// print(result.characters.count )
// }
//
// if result.characters.count == 38 {
// lable.text = result
// }
}
}
//发送指令到设备
fileprivatefuncwriteToPeripheral(bytes: [UInt8]) {
if self.writeCharacteristic != nil {
letdata:Data=dataWithHexstring(bytes: bytes)
self.peripheral?.writeValue(data, for:self.writeCharacteristic!, type: .withResponse)
}else{
}
}
//将[UInt8]数组转换为NSData
fileprivatefuncdataWithHexstring(bytes: [UInt8]) ->Data{
letdata =Data(bytes: bytes, count: bytes.count)
returndata
}
}`