从特征中获得“ Value ”

3 回答

• 0

  根据documentation，您可以通过调用： characteristic.value 来访问它，这将是 Data 类型的对象 . 然后，您可以将此对象转换为字符串 . 像这样：

  let data = characteristic.value
  var dataString = String(data: data, encoding: String.Encoding.utf8)
  

  回复于 2024-04-20T09:52:47+08:00
• 1

  我要感谢OOPer在Apple Developer论坛上的回答 .

  func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {  
      guard let data = characteristic.value else {  
          return  
      }  
      if data.elementsEqual([0x01]) { //<- You can directly compare a Data to an Array of bytes.  
          //do something  
      }
  }
  

  回复于 2024-04-20T09:52:47+08:00
• -1

  swift：在更新值时从特征中获取值 .

  func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
  
          let value = characteristic.value
  
          print(value)
  }
  

  回复于 2024-04-20T09:52:47+08:00