April 2015
Intermediate to advanced
556 pages
17h 47m
English
book
Cocoa Programming for OS X: The Big Nerd Ranch Guide
by Aaron Hillegass, Adam Preble, Nate Chandler
Content preview from Cocoa Programming for OS X: The Big Nerd Ranch Guide
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How Timers Work
Timers rely on the run loop to fire. When a timer is scheduled it calculates the next time that it should fire and asks the run loop to inform it when that time has arrived. NSTimer is fine for general purpose delays but is not suitable for cases where events must be fired with high resolution. It is documented to have a resolution on the order of 50-100ms.
For cases where timer resolution is not critical, NSTimer supports timer coalescing. By setting the tolerance property you can allow the system to massage the firing of all of the timers to happen at once, resulting in significant improvements in energy usage.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.