April 2017
Intermediate to advanced
280 pages
6h 18m
English
Content preview from MQTT Essentials - A Lightweight IoT ProtocolBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Understanding the CocoaMQTT client in Swift 3
The CocoaMQTT client is very easy to use. First, it is necessary to import CocoaMQTT, create an instance of the CocoaMQTT class, specify the MQTT connection configuration values, and indicate an instance of a class that conforms to the CocoaMQTTDelegate protocol. We can call the methods for the created CocoaMQTT instance to subscribe to topics and publish messages.
Let's take a look at the code that declares the CocoaMQTTDelegate protocol:
@objc public protocol CocoaMQTTDelegate { func mqtt(_ mqtt: CocoaMQTT, didConnect host: String, port: Int) func mqtt(_ mqtt: CocoaMQTT, didConnectAck ack: CocoaMQTTConnAck) func mqtt(_ mqtt: CocoaMQTT, didPublishMessage message: CocoaMQTTMessage, id: UInt16) func ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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