藍(lán)牙使用的基本流程

1.創(chuàng)建中心設(shè)備
2.利用中心設(shè)備掃描外部設(shè)備
3、模擬點(diǎn)擊, 然后連接指定的外設(shè)
4、連接外設(shè)成功調(diào)用，掃描外設(shè)中得服務(wù)
5、從需要的服務(wù)中查找需要的特征， 從peripheral中得service中掃描特征
6、遍歷特征, 拿到需要的特征處理
7、對(duì)特征進(jìn)行讀寫

藍(lán)牙協(xié)議的常用方法

<CBCentralManagerDelegate,CBPeripheralDelegate>
4,CBCentralManager *cm = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
    cm.delegate = self;
 //scan外設(shè)
        NSDictionary* scanOptions = [NSDictionary dictionaryWithObject:[NSNumbernumberWithBool:NO] forKey:CBCentralManagerScanOptionAllowDuplicatesKey];
        [cm scanForPeripheralsWithServices:nil options:scanOptions];

- (void) centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI//scan到設(shè)備就會(huì)調(diào)用此方法

//connect設(shè)備
NSDictionary* scanOptions = [NSDictionary dictionaryWithObject:[NSNumbernumberWithBool:NO] forKey:CBCentralManagerScanOptionAllowDuplicatesKey];
        [cm connectPeripheral:(CBPeripheral *)[_peripheralArrayobjectAtIndex:indexPath.row] options:scanOptions];

- (void) centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error//連接外設(shè)時(shí)調(diào)用

- (void) centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral*)peripheral//當(dāng)連接上一個(gè)外設(shè)  CBCentralManager 代理 處理此方法

4,//查詢?cè)O(shè)備服務(wù)特征，注意 這塊的peripheral 一定得為連接上的設(shè)備 后續(xù)發(fā)送接收數(shù)據(jù)有用
[peripheral setDelegate:self];
[peripheral discoverServices:nil];
#pragma mark -- CBPeripheralDelegate
//返回的藍(lán)牙服務(wù)通知通過(guò)代理實(shí)現(xiàn)[_peripheral discoverServices:nil];

- (void) peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
//查詢服務(wù)所帶的特征值[_peripheral discoverCharacteristics:nil forService:myService];
- (void) peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error

5，
//發(fā)送數(shù)據(jù)
[peripheral writeValue:datastr forCharacteristic:writeCharacteristictype:CBCharacteristicWriteWithResponse];
//發(fā)送成功調(diào)用
- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
//處理藍(lán)牙發(fā)過(guò)來(lái)的數(shù)據(jù)
- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error

實(shí)例.m文件

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

@interface ViewController ()<CBCentralManagerDelegate, CBPeripheralDelegate>
/**
 *  外設(shè)
 */
@property (nonatomic, strong) NSMutableArray *peripherals;
/**
 *  中心管理者
 */
@property (nonatomic, strong) CBCentralManager *mgr;
@end

@implementation ViewController

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

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    // 1.創(chuàng)建中心設(shè)備
    CBCentralManager *mgr = [[CBCentralManager alloc] init];
    self.mgr = mgr;
    
    
    // 設(shè)置代理
    mgr.delegate = self;
    
    // 2.利用中心設(shè)備掃描外部設(shè)備
    /*
     如果指定數(shù)組代表只掃描指定的設(shè)備
     */
    [mgr scanForPeripheralsWithServices:nil options:nil];
}
#pragma mark - CBCentralManagerDelegate
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
{

    // 保存掃描到得外部設(shè)備
    // 判斷如果數(shù)組中不包含當(dāng)前掃描到得外部設(shè)置才保存
    if (![self.peripherals containsObject:peripheral]) {
        
        peripheral.delegate = self;
        [self.peripherals addObject:peripheral];
    }
}

/**
 *  模擬點(diǎn)擊, 然后連接所有的外設(shè)
 */
- (void)start
{
    for (CBPeripheral *peripheral in self.peripherals) {
        /**
         *  連接外設(shè)
         */
        [self.mgr connectPeripheral:peripheral options:nil];
    }
}
/**
 *  連接外設(shè)成功調(diào)用
 */
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
{
    // 掃描外設(shè)中得服務(wù)
    [peripheral discoverServices:nil];
}
/**
 *  連接外設(shè)失敗調(diào)用
 */
- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
{
    
}

#pragma makr - CBPeripheralDelegate
/**
 *  只要掃描到服務(wù)就會(huì)調(diào)用
 *
 *  @param peripheral 服務(wù)所在的外設(shè)
 */
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
{
    
    // 獲取外設(shè)中所有掃描到得服務(wù)
    NSArray *services = peripheral.services;
    for (CBService *service in services) {
        // 拿到需要的服務(wù)
        if ([service.UUID.UUIDString isEqualToString:@"123"])
        {
            // 從需要的服務(wù)中查找需要的特征
            // 從peripheral中得service中掃描特征
            [peripheral discoverCharacteristics:nil forService:service];
        }
    }
}

/**
 *  只要掃描到特征就會(huì)調(diào)用
 *
 *  @param peripheral 特征所屬的外設(shè)
 *  @param service    特征所屬的服務(wù)
 */
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
{
    
    // 拿到服務(wù)中所有的特診
    NSArray *characteristics =  service.characteristics;
    // 遍歷特征, 拿到需要的特征處理
    for (CBCharacteristic * characteristic in characteristics) {
        if ([characteristic.UUID.UUIDString isEqualToString:@"8888"]) {
            NSLog(@"設(shè)置鬧鐘");

        }
    }
}
@end