November 2013
Intermediate to advanced
576 pages
19h 3m
English
book
iOS Components and Frameworks: Understanding the Advanced Features of the iOS SDK
by Kyle Richter, Joe Keeley
Content preview from iOS Components and Frameworks: Understanding the Advanced Features of the iOS SDKBecome 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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Timer-Based Achievements
One of the most popular achievements in iOS gaming is to play for a certain amount of time. In Whack-a-Cac com.dragonforged.whackacac.play5Mins is used to track the user’s progress towards five minutes of total gameplay. This particular example exists for the loss-of-accuracy problem that was faced in the Whack 1000 example from earlier in this section, and it can be overcome in the same manner.
To track time, a NSTimer will be created. To determine how often the timer should fire, you will need to determine what 1% of five minutes is.
play5MinTimer = [NSTimer scheduledTimerWithTimeInterval:3.0 target:self selector:@selector(play5MinTick) userInfo:nil repeats:YES];
When the timer fires a ...
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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.