IOS蓝牙连接 初步简单封装使用

最近写一个蓝牙项目 初步实现一下蓝牙设备连接交互，后期继续完善。。。。

1、连接蓝牙相关操作

BlueToothManger.h

//
//  BlueToothManger.h
//  SmartRobot
//
//  Created by 杜文杰 on 2017/8/2.
//  Copyright © 2017年 appleLJ. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <CoreBluetooth/CoreBluetooth.h>

@interface BlueToothManger : CBCentralManager
// connectSeccuss YES 连接成功 NO 连接失败
@property (nonatomic, copy) void(^cbperipheral)(CBPeripheral *peripheral,BOOL connectSeccuss);
@property (nonatomic, copy) void(^cbCharacteristic)(CBCharacteristic *characteristic);
- (instancetype)ShareBlueToothManger;
- (CBCentralManager *)centralManager;

@end

BlueToothManger.m

//
//  BlueToothManger.m
//  SmartRobot
//
//  Created by 杜文杰 on 2017/8/2.
//  Copyright © 2017年 appleLJ. All rights reserved.
//

#import "BlueToothManger.h"
#import <CoreBluetooth/CoreBluetooth.h>

@interface BlueToothManger ()<CBCentralManagerDelegate,CBPeripheralDelegate>
/// 中央管理者 -->管理设备的扫描 --连接
@property (nonatomic, strong) CBCentralManager *centralManager;
// 存储的设备
@property (nonatomic, strong) NSMutableArray *peripherals;
// 扫描到的设备
@property (nonatomic, strong) CBPeripheral *cbPeripheral;
// 文本
//@property (weak, nonatomic) IBOutlet UITextView *peripheralText;
// 蓝牙状态
@property (nonatomic, assign) CBManagerState peripheralState;

@property (nonatomic, copy) NSString *sendServerValue;

@property (nonatomic, copy) BlueToothManger *blueToothManger;
@end

// 蓝牙4.0设备名
static NSString * const kBlePeripheralName = @"JDY-08";
// 通知服务
static NSString * const kNotifyServerUUID = @"FFE0";
// 写服务
static NSString * const kWriteServerUUID = @"FFE1";
// 通知特征值
static NSString * const kNotifyCharacteristicUUID = @"FFE1";
// 写特征值
static NSString * const kWriteCharacteristicUUID = @"FFE1";

@implementation BlueToothManger

- (instancetype)ShareBlueToothManger
{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        _blueToothManger = [[BlueToothManger alloc]init];
    });
    return _blueToothManger;

}
- (NSMutableArray *)peripherals
{
    if (!_peripherals) {
        _peripherals = [NSMutableArray array];
    }
    return _peripherals;
}

- (CBCentralManager *)centralManager
{
    if (!_centralManager)
    {
        _centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
    }
    return _centralManager;
}

// 222  扫描设备
- (void)scanForPeripherals
{
    [self.centralManager stopScan];
    NSLog(@"扫描设备");
    //    [self showMessage:@"扫描设备"];
    if (self.peripheralState ==  CBManagerStatePoweredOn)
    {
        [self.centralManager scanForPeripheralsWithServices:nil options:nil];
    }
}

// 连接设备
- (void)connectToPeripheral
{
    if (self.cbPeripheral != nil)
    {
        NSLog(@"连接设备");
        //        [self showMessage:@"连接设备"];
        [self.centralManager connectPeripheral:self.cbPeripheral options:nil];
    }
    else
    {
        //        [self showMessage:@"无设备可连接"];
    }
}

// 清空设备
- (void)clearPeripherals
{
    NSLog(@"清空设备");
    [self.peripherals removeAllObjects];
    //    self.peripheralText.text = @"";
    //    [self showMessage:@"清空设备"];

    if (self.cbPeripheral != nil)
    {
        // 取消连接
        NSLog(@"取消连接");
        //        [self showMessage:@"取消连接"];
        [self.centralManager cancelPeripheralConnection:self.cbPeripheral];
    }
}
////000
//- (void)viewDidLoad {
//    [super viewDidLoad];
//    [self centralManager];
//}
///
//只要中心管理者初始化 就会触发此代理方法 判断手机蓝牙状态   状态更新时调用
- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
    switch (central.state) {
        case CBManagerStateUnknown:{
            NSLog(@"为知状态");
            self.peripheralState = central.state;
        }
            break;
        case CBManagerStateResetting:
        {
            NSLog(@"重置状态");
            self.peripheralState = central.state;
        }
            break;
        case CBManagerStateUnsupported:
        {
            NSLog(@"不支持的状态");
            self.peripheralState = central.state;
        }
            break;
        case CBManagerStateUnauthorized:
        {
            NSLog(@"未授权的状态");
            self.peripheralState = central.state;
        }
            break;
        case CBManagerStatePoweredOff:
        {
            NSLog(@"关闭状态");
            self.peripheralState = central.state;
        }
            break;
        case CBManagerStatePoweredOn:
        {
            NSLog(@"开启状态－可用状态");
            self.peripheralState = central.state;
            // 链接成功开始扫描设备
            [self scanForPeripherals];
            NSLog(@"%ld",(long)self.peripheralState);
        }
            break;
        default:
            break;
    }
}
/**
 333扫描到设备  发现设备是开启状态后调用方法

 @param central 中心管理者
 @param peripheral 扫描到的设备
 @param advertisementData 广告信息
 @param RSSI 信号强度
 */
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI
{
    //    [self showMessage:[NSString stringWithFormat:@"发现设备,设备名:%@",peripheral.name]];
    // 设备数组中是否存在 该设备
    if (![self.peripherals containsObject:peripheral])
    {
        [self.peripherals addObject:peripheral];
        NSLog(@"%@",peripheral);

        //最常用的场景是查找某一个前缀开头的设备 mogu
        if ([peripheral.name hasPrefix:@"JDY"] ) {
            //            [self showMessage:@"开始连接"];
            [self.centralManager connectPeripheral:peripheral options:nil];
        }
    }
}

/**
 连接失败

 @param central 中心管理者
 @param peripheral 连接失败的设备
 @param error 错误信息
 */

- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
{
    //    [self showMessage:@"连接失败"];
    if ([peripheral.name isEqualToString:kBlePeripheralName])
    {
        [self.centralManager connectPeripheral:peripheral options:nil];
    }
}

/**
 连接断开

 @param central 中心管理者
 @param peripheral 连接断开的设备
 @param error 错误信息
 */

- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
{
    //    [self showMessage:@"断开连接"];
    if ([peripheral.name isEqualToString:kBlePeripheralName])
    {
        [self.centralManager connectPeripheral:peripheral options:nil];
    }
}

/**
 444连接成功

 @param central 中心管理者
 @param peripheral 连接成功的设备
 */
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
{
    NSLog(@"连接设备:%@成功",peripheral.name);
    //    self.peripheralText.text = [NSString stringWithFormat:@"连接设备:%@成功",peripheral.name];
//    [self showMessage:[NSString stringWithFormat:@"连接设备:%@成功",peripheral.name]];
    // 设备
    self.cbPeripheral = peripheral;
    self.cbperipheral(peripheral, YES);

    // 设置设备的代理
    peripheral.delegate = self;
    // services:传入nil  代表扫描所有服务
    [peripheral discoverServices:nil];
}

/**
 555扫描到服务

 @param peripheral 服务对应的设备
 @param error 扫描错误信息
 */
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
{
    // 遍历所有的服务
    for (CBService *service in peripheral.services)
    {
        NSLog(@"服务:%@",service.UUID.UUIDString);
        // 获取对应的服务
        if ([service.UUID.UUIDString isEqualToString:kWriteServerUUID] || [service.UUID.UUIDString isEqualToString:kNotifyServerUUID])
        {
            // 根据服务去扫描特征
            [peripheral discoverCharacteristics:nil forService:service];
        }
    }
}

/**
 666扫描到对应的特征

 @param peripheral 设备
 @param service 特征对应的服务
 @param error 错误信息
 */
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
{
    // 遍历所有的特征
    for (CBCharacteristic *characteristic in service.characteristics)
    {

        NSLog(@"特征值:%@",characteristic.UUID.UUIDString);
        if ([characteristic.UUID.UUIDString isEqualToString:kNotifyCharacteristicUUID])
        {
            self.cbCharacteristic(characteristic);
        }
        if ([characteristic.UUID.UUIDString isEqualToString:kNotifyCharacteristicUUID])
        {
            [peripheral setNotifyValue:YES forCharacteristic:characteristic];
        }
    }
}

- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error;
{
    //这个方法比较好，这个是你发数据到外设的某一个特征值上面，并且响应的类型是 CBCharacteristicWriteWithResponse ，上面的官方文档也有，如果确定发送到外设了，就会给你一个回应，当然，这个也是要看外设那边的特征值UUID的属性是怎么设置的,看官方文档，人家已经说了，条件是，特征值UUID的属性：CBCharacteristicWriteWithResponse
    if (!error) {
        NSLog(@"说明发送成功，characteristic.uuid为：%@ 发送为%@",[characteristic.UUID UUIDString],characteristic.value);
        Byte byte2[] = {0xf0, 0x3d, 0x3d, 0x5d,0x02,0xf7};
        NSData* data2 = [[NSData alloc] initWithBytes:byte2 length:];
        if ([characteristic.value isEqualToData:data2]) {
            NSLog(@"说明发送成功，characteristic.uuid为：%@ 发送为%@",[characteristic.UUID UUIDString],characteristic.value);
        }
    }else{
        NSLog(@"发送失败了啊！characteristic.uuid为：%@  原因:%@",[characteristic.UUID UUIDString],error);

    }
    //调用下面的方法后 会调用到代理的- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
    [peripheral readValueForCharacteristic:characteristic];
}

///**
// 根据特征读到数据
//
// @param peripheral 读取到数据对应的设备
// @param characteristic 特征
// @param error 错误信息
// */
- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(nonnull CBCharacteristic *)characteristic error:(nullable NSError *)error
{
    if ([characteristic.UUID.UUIDString isEqualToString:kNotifyCharacteristicUUID])
    {
        NSData *data = characteristic.value;
        NSLog(@"%@",data);
    }
}

@end

2、一般在登录后的主窗口 初始化下面这个类 连接蓝牙和保存蓝牙相关数据 保存蓝牙设备值和特征值  发送数据会用到

SaveValueForBlueThooth.h

//
//  SaveValueForBlueThooth.h
//  SmartRobot
//
//  Created by 杜文杰 on 2017/8/10.
//  Copyright © 2017年 appleLJ. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <CoreBluetooth/CoreBluetooth.h>
#import "BlueToothManger.h"

@interface SaveValueForBlueThooth : NSObject

@property (nonatomic, strong) BlueToothManger *blueToothManager;
// 设备
@property (nonatomic, strong) CBPeripheral *peripheral;
// 特征值
@property (nonatomic, strong) CBCharacteristic *characteristic;
// 连接成功标识
@property (nonatomic, assign) BOOL connectSeccess;

+ (instancetype)allocWithZone:(struct _NSZone *)zone;
// 重新连接
- (void)bluetoothConnect;
// 发送数据
- (void)postValueForBlueThoothWithString:(NSString *)valueWithStr;

@end

SaveValueForBlueThooth.m

//
//  SaveValueForBlueThooth.m
//  SmartRobot
//
//  Created by 杜文杰 on 2017/8/10.
//  Copyright © 2017年 appleLJ. All rights reserved.
//

#import "SaveValueForBlueThooth.h"

// 通知特征值
static NSString * const kNotifyCharacteristicUUID = @"FFE1";

@implementation SaveValueForBlueThooth

static SaveValueForBlueThooth *_instance;
+ (instancetype)allocWithZone:(struct _NSZone *)zone
{
    // 也可以使用一次性代码
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        if (_instance == nil) {
            _instance = [super allocWithZone:zone];
        }
    });
    return _instance;
}

// 连接蓝牙设备
- (void)bluetoothConnect
{
    [self.blueToothManager connectPeripheral:self.peripheral options:nil];

}

// 发送数据
- (void)postValueForBlueThoothWithString:(NSString *)valueWithStr
{

    NSLog(@"设备名：%@     特征值 %@",self.peripheral.name,self.characteristic);
    // 特征值
    NSString *tzName = self.characteristic.UUID.UUIDString;
    // 设备名
    NSString *peripheraName = self.peripheral.name;
    if (tzName.length >  && peripheraName.length > ) {
        // 写入数据 M_1_1000_\r
        NSData *data = [valueWithStr dataUsingEncoding: NSUTF8StringEncoding];
        [self.peripheral writeValue:data forCharacteristic:self.characteristic type:CBCharacteristicWriteWithoutResponse];
        NSLog(@"%@",self.characteristic.UUID.UUIDString);

        NSLog(@"发送成功");
    }else {
        [self bluetoothConnect];
        NSLog(@"重新连接蓝牙");
    }

}

@end

3、在跟控制器 主窗口中声明属性

（1）

@property (nonatomic, strong) BlueToothManger *blueToothManager;
// 设备
@property (nonatomic, strong) CBPeripheral *peripheral;
// 特征值
@property (nonatomic, strong) CBCharacteristic *characteristic;
// 连接成功标识
@property (nonatomic, assign) BOOL connectSeccess;

@property (nonatomic, strong) SaveValueForBlueThooth *saveValueForBlueThooth;

（2）在 viewDidLoad中调用连接蓝牙 并保存相关 发送需要的数据

- (void)viewDidLoad {
    [super viewDidLoad];

    // 连接蓝牙
    [self connectPeripheral];

}

（3）

#pragma  mark - 蓝牙连接
- (void)connectPeripheral
{
    // 单例记录发送数据 需要用的 设备值和特征值
    _saveValueForBlueThooth = [[SaveValueForBlueThooth alloc]init];
    // 初始化blueToothManager类连接蓝牙设备
    self.blueToothManager = [[[BlueToothManger alloc]init]ShareBlueToothManger];
    [self.blueToothManager centralManager];
    __block
    __block typeof(SaveValueForBlueThooth *)saveValueForBlue = _saveValueForBlueThooth;
    // 连接蓝牙设备成功回调
    // 存储设备值
    self.blueToothManager.cbperipheral = ^(CBPeripheral *peripheral, BOOL connectSeccuss) {
        saveValueForBlue.peripheral = peripheral;
        saveValueForBlue.connectSeccess = connectSeccuss;
    };
    // 存储特征值
    self.blueToothManager.cbCharacteristic = ^(CBCharacteristic *characteristic) {
        saveValueForBlue.characteristic = characteristic;
    };
}

4、在需要发送数据的界面

（1）在 viewDidLoad中初始化类

 self.blueThoothPostValue = [[SaveValueForBlueThooth alloc]init];

（2）发送按钮点击事件

//上
- (void)topBtnEvent{
    NSLog(@"up");
    [self.blueThoothPostValue postValueForBlueThoothWithString:@"E 1\r"];
}