March 2014
Intermediate to advanced
672 pages
40h 11m
English
Content preview from The Core iOS Developer’s Cookbook, Fifth Edition
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Detecting Shakes Using Motion Events
When the iPhone detects a motion event, such as a shake, it passes that event to the current first responder, the primary object in the responder chain. Responders are objects that can handle events. All views and windows are responders, and so is the application object.
The responder chain provides a hierarchy of objects, all of which can respond to events. When an object toward the start of the chain handles an event, that event does not get passed further down. If it cannot handle it, that event can move on to the next responder.
An object may become the first responder by declaring itself to be so, via becomeFirst-Responder. In this snippet, UIViewController ensures that it becomes the first responder ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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