BLE4.0使用模块

在测试的时候,必须使用真机测试.模拟器不带该功能.

在测试该模块的时候,需要等待几十秒的时间.如果没有反应则在点击一下搜索设备按钮.

在这里,是以手机为Central,小米手环为Peripheral.

需要注意的地方是:每个设备里面都有一些服务,而每个服务里面又对应一些特征.根据特征对其进行业务处理.

由于设备不问题,在服务和特征的这两版块,没法进行测试,扫描设备和连接设备已经OK.

详细代码

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

@interface ViewController ()<CBCentralManagerDelegate,CBPeripheralDelegate,UIAlertViewDelegate,UITableViewDataSource,UITableViewDelegate>
/** 中心者 */
@property(nonatomic,strong)CBCentralManager *manager;
/** 外设蓝牙 */
@property(nonatomic,strong)CBPeripheral *peripheral;
/** 外设蓝牙设备的特征 */
@property(nonatomic,strong)CBCharacteristic *characteristic;

@property(nonatomic,strong)NSMutableArray *peripheralArr;

@property (weak, nonatomic) IBOutlet UITableView *peripheralTableView;

@end

@implementation ViewController

-(CBCentralManager *)manager{
    if(!_manager){
        _manager = [[CBCentralManager alloc]initWithDelegate:self queue:dispatch_get_main_queue()];
    }
    return _manager;
}

-(NSMutableArray *)peripheralArr{
    if(!_peripheralArr){
        _peripheralArr = [NSMutableArray array];
    }
    return _peripheralArr;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.peripheralTableView.delegate = self;
}

//扫描附近的蓝牙
- (IBAction)searchPeripheral:(UIButton *)sender {
    NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:false],CBCentralManagerScanOptionAllowDuplicatesKey,nil];
    [self.manager scanForPeripheralsWithServices:nil options:dic];
}


/**
 *  中心者改变状态的时候会调用这个方法
 */
- (void)centralManagerDidUpdateState:(CBCentralManager *)central{
    NSString * state = nil;
   
    switch ([self.manager state])
    {
        case CBCentralManagerStateUnsupported:
            state = @"The platform/hardware doesn't support Bluetooth Low Energy.";
            break;
        case CBCentralManagerStateUnauthorized:
            state = @"The app is not authorized to use Bluetooth Low Energy.";
            break;
        case CBCentralManagerStatePoweredOff:
            state = @"Bluetooth is currently powered off.";
            break;
        case CBCentralManagerStatePoweredOn:
            state = @"work";
            break;
        case CBCentralManagerStateUnknown:
            state = @"没找到";
            break;
        default:
            state = @"操作有误";

           break;

    }
    NSLog(@"Central manager state: %@", state);
}

/**
 *  发现一个蓝牙设备会调用这个方法
 *
 *  @param central           中心者
 *  @param peripheral        发现的设备
 *  @param advertisementData 广告的信息
 *  @param RSSI              接受的强弱指数
 */
-(void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI{
    //判断信号的强弱
//    if(RSSI.integerValue > -15){
//        NSLog(@"信号太强,好像不对");
//        return ;
//    }
//    if(RSSI.integerValue < -35){
//        NSLog(@"信号太弱,好像不对");
//        return ;
//    }
    [self.peripheralArr addObject:peripheral];
    [self.peripheralTableView reloadData];
    if([peripheral.name isEqualToString:@"MI"]){
        //连接设备
       [self.manager connectPeripheral:peripheral options:[NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:CBConnectPeripheralOptionNotifyOnDisconnectionKey]];
    }
}

/**
 *  当连接上某个蓝牙之后,CBCenteralManager会通知这个方法
 */
-(void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral{
    NSLog(@"蓝牙设备连接上");
    //设置连接上的蓝牙的代理
    peripheral.delegate = self;
    //停止扫描
    [self.manager stopScan];
    //查询蓝牙服务
    [peripheral discoverServices:nil];
}

/**
 *  发现设备里面的服务会调用这个方法
 */
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{
    if(error){
        NSLog(@"Discovered services for %@ with error: %@", peripheral.name, [error localizedDescription]);
        return;
    }
    //匹配蓝牙
    for (CBService *service in peripheral.services) {
        NSLog(@"Service found with UUID :%@",service.UUID);
        if([service.UUID isEqual:[CBUUID UUIDWithString:@"FFE0"]]){
            //搜索服务里面的特征
            [peripheral discoverCharacteristics:nil forService:service];
        }
    }
}

/**
 *  搜索服务里面的特征
 */
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error{
    if(error){
        NSLog(@"Discovered characteristics for %@ with error:%@",service.characteristics,error.description);
        return ;
    }
    for (CBCharacteristic *characteristic in service.characteristics) {
        if([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"FFE1"]]){
            self.peripheral = peripheral;
            self.characteristic =characteristic;
        }
    }
   
}
//发送数据给蓝牙设备
-(void)writeDataWithContenxt:(NSString *)str{
    [self.peripheral writeValue:[str dataUsingEncoding:CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000)] forCharacteristic:self.characteristic type:CBCharacteristicWriteWithResponse];
   
}

//当设备有数据返回时，系统会调用这个方法
- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{
    NSData *data = characteristic.value;
    NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}

/**
 *  断开连接
 */
-(void)disConnect{
    if(self.peripheral != nil){
        [self.manager cancelPeripheralConnection:self.peripheral];
        self.peripheral = nil;
        self.characteristic = nil;
    }
}

/**
 *  失去和外围设备的连接
 */
-(void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error{
    //重新连接
    [self.manager connectPeripheral:peripheral options:nil];
}

#pragma mark --表格的代理方法
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return self.peripheralArr.count;
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *ID = @"cell";
    UITableViewCell *cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:ID];
    NSLog(@"%@",self.peripheralArr[indexPath.row]);
    return cell;
}

@end