在IOS中检测IOS7中启用蓝牙的iPhone设备

Question

我在我的应用程序中使用核心蓝牙框架。

我知道如何扫描外围设备并从中获取值。（如心率监视器）

但我想要的是检索周围支持 BLE 4.0 和蓝牙的 iPhone 设备列表。

我参考了下面的链接..

Uses IOBluetooth Framework

Uses CoreBluetooth For Getting Peripherals not the Devices List

 - (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI {
    // I'm not sure how to make this work

    NSLog (@"Discovered peripheral: %@", [peripheral name]);
    [self.list addObject:peripheral.name]; // add peripheral name to foundarray
    NSLog (@"UUID peripheral: %@", [peripheral UUID]);

    NSLog (@"peripheral services before connected: %@", [peripheral services]);

    NSLog(@"adversting data %@",[NSString stringWithFormat:@"%@",[advertisementData description]]);

    NSLog(@"foundArray is %@", self.list);
}

- (void)centralManagerDidUpdateState:(CBCentralManager *)central {
    NSLog(@"Central manager's state is updated to: %@", central);
    if(central.state == CBCentralManagerStatePoweredOn)
    {
        //okay your good to go and can now scan
    }
    else
    {
        //Unable to use CentralManager methods so print out the central.state and find out why
    }
}

我不知道苹果是否提供这个..

任何建议或想法将不胜感激..

提前致谢..

Answer 1

您只能检索周围支持蓝牙 4.0 的 iOS 设备，前提是它们还宣传特定服务以识别它们。您不能只看到所有已开机和附近的 iOS 设备。如果他们在做广告，你可以只扫描 nil ，这将返回被看到的广告包。

注意：如果您关心从其他应用中检索当前连接的 BLE 设备，您可以使用retrieveConnectedPeripheralsWithServices: 方法。

Answer 2

试试下面的代码checkBluetoothAccess和requestBluetoothAccess方法

 - (void)checkBluetoothAccess {

          if(!self.cbManager) {
               self.cbManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
          }

       /*
            We can ask the bluetooth manager ahead of time what the authorization status is for our bundle and take the appropriate action.
      */

         CBCentralManagerState state = [self.cbManager state];

        if(state == CBCentralManagerStateUnknown) {
              [self alertViewWithDataClass:Bluetooth status:NSLocalizedString(@"UNKNOWN", @"")];
        }
       else if(state == CBCentralManagerStateUnauthorized) {
              [self alertViewWithDataClass:Bluetooth status:NSLocalizedString(@"DENIED", @"")];
        }
    else {
              [self alertViewWithDataClass:Bluetooth status:NSLocalizedString(@"GRANTED", @"")];
      }
}

- (void)requestBluetoothAccess {

      if(!self.cbManager) {
              self.cbManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
        }

    /*
            When the application requests to start scanning for bluetooth devices that is when the user is presented with a consent dialog.
    */

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

  }