iOS蓝牙--CoreBluetooth基本使用

蓝牙使用步骤：

1. 扫描外设

2. 连接外设

3. 连上外设后，获取指定外设的服务

4. 获取服务后，遍历服务的特征，得到可读，可写等特征，然后与中心管理者进行数据交互

附上代码

一：导入框架

#import <CoreBluetooth/CoreBluetooth.h>

#import <CoreLocation/CoreLocation.h>

二：设置代理，以及属性

<CBCentralManagerDelegate, CBPeripheralDelegate, UITableViewDataSource, UITableViewDelegate,CLLocationManagerDelegate>

/**

*  外设数组

*/

@property (nonatomic, strong) NSMutableArray *peripherals;

/**

*  中心管理者

*/

@property (nonatomic, strong) CBCentralManager *mgr;

/*

*   展示数据

*/

@property (nonatomic, strong) UITableView *tableView;

// 外设

@property (nonatomic, strong) CBPeripheral *peripheral;

// 特征

@property (nonatomic, strong) CBCharacteristic *characteristic;

三：方法实现

//懒加载 重写getter方法

- (NSMutableArray *)peripherals

{

if (!_peripherals) {

_peripherals = [NSMutableArray array];

}

return _peripherals;

}

- (void)viewDidLoad

{

[super viewDidLoad];

UIBarButtonItem *buttonI = [[UIBarButtonItem alloc] initWithTitle:@"扫描" style:UIBarButtonItemStylePlain target:self action:@selector(openOrclosed)];

self.navigationItem.rightBarButtonItem = buttonI;

UIBarButtonItem *buttonRB = [[UIBarButtonItem alloc] initWithTitle:@"open" style:UIBarButtonItemStylePlain target:self action:@selector(openTheDoor)];

self.navigationItem.leftBarButtonItem = buttonRB;

self.tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.height) style:UITableViewStylePlain];

[self.view addSubview:self.tableView];

self.tableView.delegate = self;

self.tableView.dataSource = self;

// Do any additional setup after loading the view.

}

#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

NSLog(@"查找设备");

if (![self.peripherals containsObject:peripheral]) {

//        if ([peripheral.identifier.UUIDString isEqualToString:@""]) {

[self.peripherals addObject:peripheral];

//        peripheral.delegate = self;

[self.tableView reloadData];

//        }

}

}

#pragma mark 显示数据的tableView的代理方法

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

return self.peripherals.count;

}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

return 1;

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

static NSString *cell_id = @"cell_id";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cell_id];

if (cell == nil) {

cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cell_id];

}

CBPeripheral *peripheral = self.peripherals[indexPath.row];

cell.textLabel.text = peripheral.name;

return cell;

}

#pragma mark tableView的点击事件

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

//    self.peripheral = self.peripherals[indexPath.row];

//    self.peripheral.delegate = self;

//    ((CBPeripheral *)self.peripherals[indexPath.row]).delegate=self;

//    [self.mgr connectPeripheral:self.peripherals[indexPath.row] options:nil];

self.peripheral = self.peripherals[indexPath.row];

[self.mgr connectPeripheral:self.peripheral options:nil];

self.peripheral.delegate = self;

//    ((CBPeripheral *)self.peripherals[indexPath.row]).delegate=self;

}

/**

*  扫描外设

*/

- (void)openOrclosed

{

if ([self.navigationItem.rightBarButtonItem.title isEqualToString:@"扫描"]) {

NSLog(@"扫描");

[self.navigationItem.rightBarButtonItem setTitle:@"断开"];

// 1.创建中心设备

// 设置代理

self.mgr = [[CBCentralManager alloc] initWithDelegate:self queue:nil];

// 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

*/

[self.mgr scanForPeripheralsWithServices:nil options:nil];

} else {

NSLog(@"断开");

[self.mgr stopScan];

if (self.peripheral != nil)

{

NSLog(@"disConnect start");

[self.mgr cancelPeripheralConnection:self.peripheral];

}

self.peripherals = nil;

[self.tableView reloadData];

[self.navigationItem.rightBarButtonItem setTitle:@"扫描"];

}

}

/**

*  连接外设成功调用

*/

- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral

{

//    [self showTheAlertViewWithMassage:@"链接成功"];

NSLog(@"链接成功");

// 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

{

//    [self showTheAlertViewWithMassage:@"链接失败"];

NSLog(@"链接失败");

}

#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

{

NSLog(@"扫描服务");

//    [self showTheAlertViewWithMassage:@"扫描服务"];

// 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

NSLog(@"%@", service.UUID.UUIDString);

if ([service.UUID.UUIDString isEqualToString:RX_SERVICE_UUID])

{

[self showTheAlertViewWithMassage:@"拿到了对应的服务了"];

// 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

{

NSLog(@"扫描特征");

// 拿到服务中所有的特征

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:RX_CHAR_UUID]) {

//            [self showTheAlertViewWithMassage:@"拿到只读的的特征了"];

NSLog(@"拿到可写的的特征了");

//            characteristic.value

NSString *valueStr = [[NSString alloc] initWithData:characteristic.value encoding:NSUTF8StringEncoding];

NSLog(@"%@????", valueStr);

self.characteristic = characteristic;

[self showTheAlertViewWithMassage:valueStr];

}

if ([characteristic.UUID.UUIDString isEqualToString:TX_CHAR_UUID]) {

}

}

}

- (void)centralManagerDidUpdateState:(CBCentralManager *)central

{

NSLog(@"检测代理方法");

if (central.state == 5) {

[self.mgr scanForPeripheralsWithServices:nil options:nil];

//        [self showTheAlertViewWithMassage:@"手机蓝牙处于可用状态"];

}

NSLog(@"%ld， %@", central.state, central);

}

#pragma mark 发送消息成功

- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error

{

NSLog(@"发送消息的回调");

NSLog(@"----%@", error);

if (!error) {

NSLog(@"??????????");

}

}

#pragma mark 处理蓝牙发送过来的数据

- (void)peripheral:(CBPeripheral *)peripheral didWriteValueForDescriptor:(CBDescriptor *)descriptor error:(NSError *)error

{

NSLog(@"接收到数据");

}

- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error

{

NSLog(@">>>>>>>");

if (error)

{

NSLog(@"Error updating value for characteristic %@ error: %@", characteristic.UUID, [error localizedDescription]);

//        if ([_mainMenuDelegate respondsToSelector:@selector(DidNotifyReadError:)])

//            [_mainMenuDelegate DidNotifyReadError:error];

//

//        return;

}

NSMutableData *recvData;

[recvData appendData:characteristic.value];

if ([recvData length] >= 5)//已收到长度

{

unsigned char *buffer = (unsigned char *)[recvData bytes];

int nLen = buffer[3]*256 + buffer[4];

if ([recvData length] == (nLen+3+2+2))

{

//接收完毕，通知代理做事

//            if ([_mainMenuDelegate respondsToSelector:@selector(DidNotifyReadData)])

//                [_mainMenuDelegate DidNotifyReadData];

NSLog(@"???????");

}

}

}

- (void)didReceiveMemoryWarning

{

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

- (void)showTheAlertViewWithMassage:(NSString *)massage

{

UIAlertView *alertV = [[UIAlertView alloc] initWithTitle:@"温馨提示" message:massage delegate:self cancelButtonTitle:@"确定" otherButtonTitles: nil];

[alertV show];

}

- (void)openTheDoor

{

NSLog(@"拿到了可读可写的特征了");

//    self.peripheral.delegate = self;

//    characteristic.value = [string dataUsingEncoding:NSUTF8StringEncoding];

//    characteristic.value = [NSData dataWithBytes:string.UTF8String length:string.length];

//    [self.peripheral writeValue:data forCharacteristic:self.characteristic type:CBCharacteristicWriteWithResponse];

//    [self.peripheral setNotifyValue:NO forCharacteristic:self.characteristic];

[self writeString:@"OLWANDA_IL12345678"];

}

- (void) writeString:(NSString *) string

{

NSData *data = [NSData dataWithBytes:string.UTF8String length:string.length];

//       NSLog(@"%@",self.characteristic.UUID.UUIDString);

self.peripheral.delegate=self;

NSLog(@"%@",self.peripheral.delegate);

if ((self.characteristic.properties & CBCharacteristicPropertyWriteWithoutResponse) != 0)

{

[self.peripheral writeValue:data forCharacteristic:self.characteristic type:CBCharacteristicWriteWithoutResponse];

}

else if ((self.characteristic.properties & CBCharacteristicPropertyWrite) != 0)

{

[self.peripheral writeValue:data forCharacteristic:self.characteristic type:CBCharacteristicWriteWithResponse];

}

else

{

NSLog(@"No write property on TX characteristic, %ld.", self.characteristic.properties);

}

//    <CBCharacteristic: 0x17408f500, UUID = 6E400002-B5A3-F393-E0A9-E50E24DCCA9E, properties = 0xC, value = (null), notifying = NO>

}