Question:
1) What's the maximum value for major and minor for iBeacon transmitter?
2) I'm using only one UUID, is there a limit for startRangingBeaconsInRegion to detect the major and minor value?
Both Major and Minor is 16bits. So the maximum major/minor is 65535.
来源：https://stackoverflow.com/questions/29505807/whats-the-maximum-value-for-major-and-minor-for-ibeacon-transmitter