CBCentralManagerDelegate: Connection Event Handling in iOS

The function 'centralManager(_:connectionEventDidOccur:for:)' is a delegate method of the CBCentralManagerDelegate protocol. It's called when a connection event occurs for a peripheral.

Parameters:

• central: The central manager object.
• event: The connection event that occurred.
• peripheral: The peripheral for which the connection event occurred.

This method is typically used to handle connection events such as when a peripheral is connected or disconnected from the central manager. The connection event can be used to determine the state of the peripheral's connection and perform any necessary actions based on that state.