问题
I am reading characteristic properties from a BLE device from my iPhone.
However, some of the properties I am seeing (like 0xA, 0x22) are not in the enumerated list that Apple provides. Are these properties a combination of 2 or more enumerated values? Or are these custom properties from the manufacturer? Need guidance on this.
回答1:
As you can read in the documentation:
Values representing the possible properties of a characteristic. Since characteristic properties can be combined, a characteristic may have multiple property values set.
In other words, a characteristic may have more than one property. That makes sense as you can, for example, have a characteristic which can be read (CBCharacteristicPropertyRead) and written to (CBCharacteristicPropertyWrite).
In this case the value of CBCharacteristic's properties would be the bitwise OR of CBCharacteristicPropertyRead and CBCharacteristicPropertyWrite, which is 0xA.
来源：https://stackoverflow.com/questions/31768645/interpret-characteristic-properties-ios-and-ble