蓝牙使用的基本流程
1.创建中心设备
2.利用中心设备扫描外部设备
3、模拟点击, 然后连接指定的外设
4、连接外设成功调用，扫描外设中得服务
5、从需要的服务中查找需要的特征， 从peripheral中得service中扫描特征
6、遍历特征, 拿到需要的特征处理
7、对特征进行读写
蓝牙协议的常用方法
<CBCentralManagerDelegate,CBPeripheralDelegate>
4,CBCentralManager *cm = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
cm.delegate = self;
//scan外设
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到设备就会调用此方法
//connect设备
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//连接外设时调用
- (void) centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral*)peripheral//当连接上一个外设 CBCentralManager 代理 处理此方法
4,//查询设备服务特征，注意 这块的peripheral 一定得为连接上的设备 后续发送接收数据有用
[peripheral setDelegate:self];
[peripheral discoverServices:nil];
#pragma mark -- CBPeripheralDelegate
//返回的蓝牙服务通知通过代理实现[_peripheral discoverServices:nil];
- (void) peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
//查询服务所带的特征值[_peripheral discoverCharacteristics:nil forService:myService];
- (void) peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
5，
//发送数据
[peripheral writeValue:datastr forCharacteristic:writeCharacteristictype:CBCharacteristicWriteWithResponse];
//发送成功调用
- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
//处理蓝牙发过来的数据
- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
实例.m文件
#import "ViewController.h"
#import <CoreBluetooth/CoreBluetooth.h>
@interface ViewController ()<CBCentralManagerDelegate, CBPeripheralDelegate>
/**
* 外设
*/
@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.创建中心设备
CBCentralManager *mgr = [[CBCentralManager alloc] init];
self.mgr = mgr;
// 设置代理
mgr.delegate = self;
// 2.利用中心设备扫描外部设备
/*
如果指定数组代表只扫描指定的设备
*/
[mgr scanForPeripheralsWithServices:nil options:nil];
}
#pragma mark - CBCentralManagerDelegate
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
{
// 保存扫描到得外部设备
// 判断如果数组中不包含当前扫描到得外部设置才保存
if (![self.peripherals containsObject:peripheral]) {
peripheral.delegate = self;
[self.peripherals addObject:peripheral];
}
}
/**
* 模拟点击, 然后连接所有的外设
*/
- (void)start
{
for (CBPeripheral *peripheral in self.peripherals) {
/**
* 连接外设
*/
[self.mgr connectPeripheral:peripheral options:nil];
}
}
/**
* 连接外设成功调用
*/
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
{
// 扫描外设中得服务
[peripheral discoverServices:nil];
}
/**
* 连接外设失败调用
*/
- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error
{
}
#pragma makr - CBPeripheralDelegate
/**
* 只要扫描到服务就会调用
*
* @param peripheral 服务所在的外设
*/
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
{
// 获取外设中所有扫描到得服务
NSArray *services = peripheral.services;
for (CBService *service in services) {
// 拿到需要的服务
if ([service.UUID.UUIDString isEqualToString:@"123"])
{
// 从需要的服务中查找需要的特征
// 从peripheral中得service中扫描特征
[peripheral discoverCharacteristics:nil forService:service];
}
}
}
/**
* 只要扫描到特征就会调用
*
* @param peripheral 特征所属的外设
* @param service 特征所属的服务
*/
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
{
// 拿到服务中所有的特诊
NSArray *characteristics = service.characteristics;
// 遍历特征, 拿到需要的特征处理
for (CBCharacteristic * characteristic in characteristics) {
if ([characteristic.UUID.UUIDString isEqualToString:@"8888"]) {
NSLog(@"设置闹钟");
}
}
}
@end
