IOS学习之蓝牙4.0

1建立中心角色

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#import <CoreBluetooth/CoreBluetooth.h>  CBCentralManager *manager;  manager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];

2扫描外设（discover）

[manager scanForPeripheralsWithServices:nil options:options]; 

3连接外设(connect)

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- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI  {         if([peripheral.name  isEqualToString:BLE_SERVICE_NAME]){                 [self connect:peripheral];         } s);  }          -(BOOL)connect:(CBPeripheral *)peripheral{         self.manager.delegate = self;         [self.manager connectPeripheral:peripheral                                 options:[NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:CBConnectPeripheralOptionNotifyOnDisconnectionKey]]; }

　　

4扫描外设中的服务和特征(discover)

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- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral  {              NSLog(@"Did connect to peripheral: %@", peripheral);      _testPeripheral = peripheral;              [peripheral setDelegate:self];  <br>//查找服务     [peripheral discoverServices:nil];                  }

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- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error  {                  NSLog(@"didDiscoverServices");              if (error)      {          NSLog(@"Discovered services for %@ with error: %@", peripheral.name, [error localizedDescription]);                      if ([self.delegate respondsToSelector:@selector(DidNotifyFailConnectService:withPeripheral:error:)])              [self.delegate DidNotifyFailConnectService:nil withPeripheral:nil error:nil];                      return;      }                  for (CBService *service in peripheral.services)      {           //发现服务         if ([service.UUID isEqual:[CBUUID UUIDWithString:UUIDSTR_ISSC_PROPRIETARY_SERVICE]])          {              NSLog(@"Service found with UUID: %@", service.UUID);  <br>//查找特征             [peripheral discoverCharacteristics:nil forService:service];              break;          }                              }  }

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- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error {           if (error)     {         NSLog(@"Discovered characteristics for %@ with error: %@", service.UUID, [error localizedDescription]);                   [self error];         return;     }           NSLog(@"服务：%@",service.UUID);     for (CBCharacteristic *characteristic in service.characteristics)     {        //发现特征             if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"xxxxxxx"]]) {                 NSLog(@"监听：%@",characteristic);<br>//监听特征                 [self.peripheral setNotifyValue:YES forCharacteristic:characteristic];             }               } }

5与外设做数据交互(读 与 写)　　

读

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- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {     if (error)     {         NSLog(@"Error updating value for characteristic %@ error: %@", characteristic.UUID, [error localizedDescription]);         self.error_b = BluetoothError_System;         [self error];         return;     }       //    NSLog(@"收到的数据：%@",characteristic.value);     [self decodeData:characteristic.value]; }

写

1 2	NSData *d2 = [[PBABluetoothDecode sharedManager] HexStringToNSData:@"0x02"];                 [self.peripheral writeValue:d2 forCharacteristic:characteristic type:CBCharacteristicWriteWithoutResponse];