蓝牙开发

想要进行蓝牙开发,需要添加系统的CoreBluetooth框架CoreBluetooth.framework

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

@interface ViewController ()<CBCentralManagerDelegate, CBPeripheralDelegate>

//外设管理者
@property (nonatomic, strong) CBCentralManager * manager;

//存放所有扫描到的外设
@property (nonatomic, strong) NSMutableArray * peripheralArrayM;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //创建中央管理者
    self.manager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
    
    //扫描周边的外设
    [self.manager scanForPeripheralsWithServices:nil options:nil];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    
    [self.manager stopScan];
}

#pragma mark - CBCentralManagerDelegate
//实时更新扫描到的设备状态
- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
    NSLog(@"------%ld", (long)central.state);
}

/**
 1.发现外围设备
 
 @param central central
 @param peripheral 外围设备
 @param advertisementData 相关信息
 @param RSSI 信号强度
 */
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary<NSString *, id> *)advertisementData RSSI:(NSNumber *)RSSI
{
    if (![self.peripheralArrayM containsObject:peripheral]) {
        [self.peripheralArrayM addObject:peripheral];
    }
    
    //2.连接对应的外设
    [self.manager connectPeripheral:peripheral options:nil];
    
    peripheral.delegate = self;
}

//3.中心管理者连接外围设备成功之后会调用
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
{
    //4.扫描服务 (nil:会发现所有服务)
    [peripheral discoverServices:nil];
}
#pragma mark - CBPeripheralDelegate
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
{
    //5.扫描到服务
    NSArray * services = peripheral.services;
    for (CBService * service in services) {
        //每一个服务,根据服务去扫描
        if ([service.UUID.UUIDString isEqualToString:@"你想要操作的服务"]) {
            //6.让外设去发现该服务的所有特征
            [peripheral discoverCharacteristics:nil forService:service];
            
        }
    }
}

/**
 外设发现特征
 
 @param peripheral 外设
 @param service 服务
 @param error error
 */
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(nonnull CBService *)service error:(nullable NSError *)error
{
    //7.获取到对应服务的特征
    NSArray * characteristics = service.characteristics;
    for (CBCharacteristic * characteristic in characteristics) {
        //每一个特征
        if ([characteristic.UUID.UUIDString isEqualToString:@"你想要操作的特性"]) {
            //8.向对应的特征写、读数据
            [peripheral writeValue:[[NSData alloc] init] forCharacteristic:characteristic type:CBCharacteristicWriteWithResponse];
            [peripheral readValueForCharacteristic:characteristic];
            
        }
    }
}

- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForDescriptor:(nonnull CBDescriptor *)descriptor error:(nullable NSError *)error
{
    //9.向对应的特征写数据
    NSLog(@"---9.向对应的特征写数据---%@", descriptor.UUID.UUIDString);
}

- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForDescriptor:(CBDescriptor *)descriptor error:(NSError *)error
{
    //10.对应的特征读数据
    NSLog(@"---10.对应的特征读数据---%@", descriptor.UUID.UUIDString);
}


#pragma mark - 懒加载
- (NSMutableArray *)peripheralArrayM
{
    if (_peripheralArrayM == nil) {
        _peripheralArrayM = [NSMutableArray array];
    }
    return _peripheralArrayM;
}

@end

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