1. © 2012 Citrrus LLC. All Rights Reserved.

2. The iPhone will prove to be more historically
significant than
the Personal Computer
© 2012 Citrrus LLC. All Rights Reserved.

3. Above a Bar
© 2012 Citrrus LLC. All Rights Reserved.

4. Agile Optimization
Start slow...
© 2012 Citrrus LLC. All Rights Reserved.

5. DebugLog... your best friend
#ifdef DEBUG
#define DebugLog(...) NSLog(@"%s (%d) %@",
__PRETTY_FUNCTION__, __LINE__, [NSString
stringWithFormat:__VA_ARGS__])
#else
#define DebugLog(...)
#endif
2012-05-07 18:02:20.775 UVA Magazine[4509:17c03]
-[PDFPageViewController viewWillAppear:] (78) View Will Appear for PDF Page
© 2012 Citrrus LLC. All Rights Reserved.

6. Perception
“Beauty is everywhere a
welcome guest.”
Johann Wolfgang von Goethe
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7. Images... more than meets the eye
+[UIImage imageNamed:]
* Reads file
* Uncompresses
* Caches
+[UIImage imageWithContentsOfFile:]
* Checks access to file
* File is read and uncompressed
when image drawn
© 2012 Citrrus LLC. All Rights Reserved.

8. Images... more than meets the eye
© 2012 Citrrus LLC. All Rights Reserved.

9. Memory Management
Use Less
Release Early and Often
© 2012 Citrrus LLC. All Rights Reserved.

10. Networking
Combine Requests
Compact your data
© 2012 Citrrus LLC. All Rights Reserved.

11. Fast Scrolling
Do your own drawing
Reuse/Recycle
Don’t get in the way of the
main thread
© 2012 Citrrus LLC. All Rights Reserved.

12. Burn the resource you have
Memory vs CPU
© 2012 Citrrus LLC. All Rights Reserved.

13. CoreData + SQLite
CoreData + SQLite = partial file access
-[NSData initWithContentsOfFile] = full file access
© 2012 Citrrus LLC. All Rights Reserved.

14. Enumeration
objectAtIndex
for(int i=0;i<count;i++)
{
id item;
item = [myObjects objectAtIndex:i];
NSLog(@"Found an Item: %@",item);
}
NSFastEnumeration
for(id item in myObjects)
{
NSLog@"Found an Item: %@",item);
}
© 2012 Citrrus LLC. All Rights Reserved.