Scrolling Like Butter

How to increase scrolling performance in UITableView a super long time ago.

Presented at Awesome Inc. Mobile miniConference in Lexington, Kentucky.

Transcript

1. Scrolling Like Butter Sam Soffes
2. UITableView Everyone’s doing it
3. UITableView Scrolling Nemesis
4. http://blog.atebits.com
5. So what’s good? Double cheeseburger. Ketchup only.
6. 1 FPS >30 FPS Choppy Awesome
7. Twitterrific
8. Tweetie
9. iPod
10. YouTube
11. You’re doing it wrong It’s okay, most people are.
12. How do I fix it? Magic and doing a rain dance
13. Instruments Core Animation
14. Demo
15. Reuse Cells It’s easy. Why not?
16. UITableViewCell *cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil] autorelease];
17. static NSString *cellIdentifier = @"cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier] autorelease]; }
18. Optimize Blending Embrace the green
19. Bad Good
20. label.backgroundColor = [UIColor whiteColor]; label.opaque = YES;
21. drawRect: vs Subviews Kinda a pain, but worth it
22. Lorem Ipsum
23. Lorem Ipsum
24. Stuff to Check Out My blog: http://samsoff.es My Twitter: http://twitter.com/samsoffes My GitHub: http://github.com/samsoffes
25. Stuff to Check Out My blog: http://samsoff.es My Twitter: http://twitter.com/samsoffes My GitHub: http://github.com/samsoffes