使用CBCentralMannager模式
Demo样式：
蓝牙demo示例
1.导入CoreBluetooth框架
#import <CoreBluetooth/CoreBluetooth.h>
2.遵守CBCentralManagerDelegate,CBPeripheralDelegate协议
@interface ViewController () <CBCentralManagerDelegate,CBPeripheralDelegate>
3.检测蓝牙状态
// 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;
NSLog(@"%ld",(long)self.peripheralState);
}
break;
default:
break;
}
}
4.建立中心角色
self.centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
5.扫描设备
if (self.peripheralState == CBManagerStatePoweredOn) {
[self.centralManager scanForPeripheralsWithServices:nil options:nil];
}
6.发现外设
/**
扫描到设备
@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 {
NSLog(@"%@",[NSString stringWithFormat:@"发现设备,设备名:%@",peripheral.name]);
}
7.连接外设
7.1连接成功
/**
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.centralManager stopScan];
}
7.2连接失败
/**
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 {
NSLog(@"%@",@"连接失败");
}
7.3连接断开
/**
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 {
NSLog(@"%@",@"断开连接");
}
8.扫描外设中的服务
// 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];
8.1发现并获取外设中的服务
/**
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);
}
}
9.扫描外设对应服务的特征
// 根据服务去扫描特征
[peripheral discoverCharacteristics:nil forService:service];
9.1发现并获取外设对应服务的特征
/**
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 {
NSLog(@"%@",peripheral);
}
9.2给对应特征写数据
[peripheral writeValue:data forCharacteristic:characteristic type:CBCharacteristicWriteWithResponse];
10.订阅特征的通知
if ([characteristic.UUID.UUIDString isEqualToString:kNotifyCharacteristicUUID]){
[peripheral setNotifyValue:YES forCharacteristic:characteristic];
}
10.1根据特征读取数据 didUpdateValueForCharacteristic
/**
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);
}
}
