iOS 蓝牙/BLE4.0

//
//  ViewController.m
//  BLE4.0
//
//  Created by djlovettt on 2017/5/18.
//  Copyright © 2017年 djlovettt. All rights reserved.
//

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

@interface ViewController ()<CBCentralManagerDelegate,CBPeripheralDelegate>

@property (nonatomic, strong) CBCentralManager *mgr; /** *管理者 */
@property(nonatomic,strong)NSMutableArray *peripheralsArr; /** 存储扫描到的设备 */
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    _mgr = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
    _peripheralsArr = [NSMutableArray new];
}

/**
 检测设备的蓝牙状态
 */
- (void)centralManagerDidUpdateState:(CBCentralManager *)central {
    switch (central.state) {
        case CBManagerStatePoweredOff:
            NSLog(@"设备未开启蓝牙!");
            break;
        case CBManagerStatePoweredOn:
            NSLog(@"设备蓝牙已开启!");
            //开始扫描设备
            [self.mgr scanForPeripheralsWithServices:nil options:nil];
            break;
        case CBManagerStateUnsupported:
            NSLog(@"设备不支持蓝牙!");
            break;
        default:
            break;
    }
}

/**
 扫描到蓝牙设备的代理方法
 @param RSSI 信号强度
 */
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *,id> *)advertisementData RSSI:(NSNumber *)RSSI {
    if (![self.peripheralsArr containsObject:peripheral]) {
        [self.peripheralsArr addObject:peripheral];
        //扫描到的全部蓝牙设备
        NSLog(@"Scan BLE Devices === %@",self.peripheralsArr);
    }
    //匹配出需要连接的设备,进行连接
    for (CBPeripheral *peripheral in self.peripheralsArr) {
        NSLog(@"peripheral.name === %@",peripheral.identifier.UUIDString);
        if ([peripheral.identifier.UUIDString isEqualToString:@"设备标识码"]) {
            [self connect:peripheral];
        }
    }
}

/**
 连接设备的方法
 */
-(void)connect:(CBPeripheral*)peripheral {
    if (!peripheral) {
        NSLog(@"未检索到该设备!");
    } else {
        [self.mgr connectPeripheral:peripheral options:nil];
    }
}

/**
 设备连接成功
 */
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral {
    NSLog(@"设备已连接成功!");
}

/**
 设备连接失败
 */
-(void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{
    NSLog(@"连接外围设备失败!");
}

/**
 搜索到蓝牙设备的服务信息
 */
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error {
    NSLog(@"peripheral.services === %@",peripheral.services);
    for (CBService *serive in peripheral.services) {
        if ([serive.UUID.UUIDString isEqualToString:@"设备的某个服务码"]) {
            //遍历到需要的服务之后开始扫描特征值
            [peripheral discoverCharacteristics:nil forService:serive];
        }
    }
}

/**
 扫描设备特征值
 */
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error {
    NSLog(@"service.characteristics === %@",service.characteristics);
    
    for (CBCharacteristic *characteristic in service.characteristics) {
        
        if ([characteristic.UUID.UUIDString isEqualToString:@"设备的某个服务码"]) {
            NSLog(@"%lu",             (unsigned long)characteristic.properties);
            [peripheral setNotifyValue:YES forCharacteristic:characteristic];
            [peripheral readValueForCharacteristic:characteristic];
            
            //读取特征值
            NSString *value=[[NSString alloc]initWithData:characteristic.value encoding:NSUTF8StringEncoding];
            NSLog(@"读取到特征值：%@",value);
        }
        else if ([characteristic.UUID.UUIDString isEqualToString:@"设备的某个服务码"]) {
            NSLog(@"%lu",(unsigned long)characteristic.properties);
            [peripheral setNotifyValue:YES forCharacteristic:characteristic];
            [peripheral readValueForCharacteristic:characteristic];
            
            //读取特征值
            NSString *value=[[NSString alloc]initWithData:characteristic.value encoding:NSUTF8StringEncoding];
            NSLog(@"读取到特征值：%@",value);
            
            //需要写入的数据
            NSString *str = [NSString stringWithFormat:@"需要交互的数据"];
            NSData  *data = [str dataUsingEncoding:NSUTF8StringEncoding];
            [peripheral writeValue:data forCharacteristic:characteristic type:CBCharacteristicWriteWithResponse];
        }
    }
}

/**
 收到特征值更新
 */
-(void)peripheral:(CBPeripheral *)peripheral didUpdateNotificationStateForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
    NSLog(@"收到特征更新通知...%@", characteristic);
    if(characteristic.value){
        NSString *value=[[NSString alloc]initWithData:characteristic.value encoding:NSUTF8StringEncoding];
        NSLog(@"读取到特征值：%@",value);
    }
    if (error) {
        NSLog(@"更新通知状态时发生错误，错误信息：%@",error.localizedDescription);
    }
}

//读取数据
- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
    NSLog(@"%@", characteristic);
    if(characteristic.value){
        NSString *value=[[NSString alloc]initWithData:characteristic.value encoding:NSUTF8StringEncoding];
        NSLog(@"读取到特征值：%@",value);
        
        int i=0;
        [characteristic.value getBytes:&i length:2];
        NSLog(@"%d",i);
    }
    if (error) {
        NSLog(@"Error updating value for characteristic %@ error: %@", characteristic.UUID, [error localizedDescription]);
        return;
    }
}

//写操作完成调用
- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
    NSLog(@"---didWriteValueForCharacteristic-----%@", characteristic);
    NSString *value=[[NSString alloc]initWithData:characteristic.value encoding:NSUTF8StringEncoding];
    NSLog(@"读取到特征值：%@",value);
}

/**
 断开与设备的链接
 */
-(void)disConnect:(CBPeripheral *)peripheral {
    if (peripheral != nil) {
        [_mgr cancelPeripheralConnection:peripheral];
    } else {
        NSLog(@"断开连接失败,未检索到设备!");
    }
}

@end