IOS:当用户选择行时，从表视图连接外围设备

Question

我正在开发核心蓝牙应用程序。当我开始在表视图中发现设备时，当我使用did select row at index path中的did connect委托方法选择要连接的设备时，在控制台中出现错误，我发现和连接设备的代码如下所示

用于发现外围设备

 - (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:  
    (CBPeripheral 
    *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
    {

    self.discoveredPeripheral = peripheral;
    _logData = [NSString stringWithFormat:@"Did discover peripheral. peripheral: %@ rssi: %@,  
    `enter code here`UUID: %@   advertisementData: %@ ", peripheral, RSSI, peripheral.UUID,  
      advertisementData];
    NSLog(@"%@",_logData);


 [_periferalDevices addObject:peripheral.name];
 [_tableView reloadData];


 }

用于连接外围设备

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

   *)peripheral
  {
   peripheral.delegate = self;

  [self.discoveredPeripheral discoverServices:nil];
   NSLog(@"Peripheral Connected");
   NSLog(@" started  time is %@",_timestring);
  // Stop scanning
 //[self.centralManager stopScan];
 NSLog(@"Scanning stopped");
  [self.data setLength:0];
[peripheral discoverServices:nil];


  [peripheral discoverServices:@[[CBUUID UUIDWithString:TRANSFER_SERVICE_UUID]]];
  }

我的困惑是在下面的代码中，在选择选定行中的特定外围设备后，我们必须编写什么代码才能在表视图中连接发现的设备。

    - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath   
    *)indexPath
    {
   if (_periferalDevices.count >0 )
  {
    CBPeripheral *peripheral =[_periferalDevices objectAtIndex:indexPath.row];
    _discoveredPeripheral = peripheral;
    NSLog(@"selected peripheral - %@",peripheral);
   [self.centralManager connectPeripheral:peripheral options:nil];
    [_periferalDevices removeObject:peripheral];
    NSLog(@"selected peripheral state - %d",peripheral.state);

     [tableView reloadData];

   NSString *strID = [NSString   stringWithFormat:@"%@",_discoveredPeripheral.identifier];
     strID = [strID substringFromIndex: [strID length] - 20];
     UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"conected" message:@""  
      delegate:self cancelButtonTitle:@"ok" otherButtonTitles: nil];
    [alert show];

 }

  }
  i am getting the errors as specified below
 2014-10-14 11:36:46.697 Bluetooth_iph[1705:368603] selected peripheral - MetaWatch 56
 2014-10-14 11:36:50.385 Bluetooth_iph[1705:368603] -[__NSCFString identifier]: unrecognized    
 selector sent to instance 0x14e67190
 2014-10-14 11:36:50.387 Bluetooth_iph[1705:368603] *** Terminating app due to uncaught   
 exception 'NSInvalidArgumentException', reason: '-[__NSCFString identifier]: unrecognized    
 selector sent to instance 0x14e67190'

  *** First throw call stack:

  (0x28b47f87 0x36576c77 0x28b4d37d 0x28b4b259 0x28a7cd68 0x28818c7d 0xfb6db 0x2c0dcc57  
  0x2c18e2d7 0x2c040449 0x2bfbc30f 0x28b0e845 0x28b0bf29 0x28b0c32b 0x28a59db1 0x28a59bc3  
   0x2fdbc051 0x2c025a31 0xfc57d 0x36b12aaf)

    libc++abi.dylib: terminating with uncaught exception of type NSException 

我已经给出了上面的代码，但是连接外设的委托方法不是working.please，提前帮我谢谢

Answer 1

您应该添加peripheral对象并在cellForRowAtIndexPath中检索名称，而不是将peripheral.name添加到periferalDefices数组中。然后，您的didSelectRowAtIndexPath将与您编写的一样