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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Publishing messages to target actuators in Swift
Whenever the user changes the value for the motorSwitch switch, we want to send a message to request the board to turn on or turn off the motor.
Click on Main.storyboard in the Project Navigator on the left-hand side of the Xcode window. The editor will switch to a design view that displays how the view will look. Click on View Controller under View Controller Scene, then click on View, and finally on Motor Switch.
Navigate to View | Assistant Editor | Show Assistant Editor in the Xcode menu or simply click on the button with two intersecting circles in the upper-right corner (the second button). Xcode will display the source code for the ViewController class on the right-hand side of the view preview ...
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