Code and Slides:
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iPhone Persistence Tony Hillerson
For Mere Mortals Software Architect
Tuesday, March 3, 2009

Persistence
Code and Slides:
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Tuesday, March 3, 2009

Persistence
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... or it means saving stuff.
Tuesday, March 3, 2009

Persistence: Disclaimer
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BTW: I’m a n00b
Tuesday, March 3, 2009

Code and Slides:
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Persistence: Savin’ stuff on ur fone
Your options
Tuesday, March 3, 2009

Persistence: Options
Code and Slides:
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Settings
SQLite
Filesystem
The Internets
Tuesday, March 3, 2009

Persistence: Options
Code and Slides:
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Settings
SQLite
Filesystem
The Internets
Tuesday, March 3, 2009

Persistence: Our Sweet App
Code and Slides:
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Tuesday, March 3, 2009

Persistence: Sweet Codes
http://github.com/thillerson/grocery_getter/
Code and Slides:
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Download
Tuesday, March 3, 2009

Code and Slides:
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Persistence: Settings
Yours or Apple’s?
Tuesday, March 3, 2009

Persistence: Settings
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Apple’s => Settings.bundle
Yours => Roll your own
Both end up in
NSUserDefaults
Tuesday, March 3, 2009

Persistence: Settings
Code and Slides:
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Can be one of:
NSData, NSString,
NSNumber, NSDate,
NSArray, or NSDictionary
Tuesday, March 3, 2009

Persistence: Settings
Code and Slides:
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NSUserDefaults *settings =
[NSUserDefaults standardUserDefaults];
[settings setBool:YES
forKey:@\"shouldSortAfterComplete\"];
[NSUserDefaults standardUserDefaults];
[NSUserDefaults resetStandardUserDefaults];
BOOL on =
[settings
boolForKey:@\"shouldSortAfterComplete\"];
Tuesday, March 3, 2009

Code and Slides:
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Persistence: SQLite
It’s small, but it’s feisty!
Tuesday, March 3, 2009

Persistence: SQLite
Code and Slides:
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YO DAWG I HERD YOU
LIEK DATA...
Tuesday, March 3, 2009

Persistence: SQLite
Code and Slides:
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SQLite - Embedded Relational
Database written in C
Tuesday, March 3, 2009

Persistence: SQLite
Code and Slides:
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Embedded Relational Database
written in C
Tuesday, March 3, 2009

SQLite:
Code and Slides:
Hic Draconae
http://thillerson.googlecode.com
Sunt
CocoaTouch:
Terra Firma
Tuesday, March 3, 2009

Persistence: SQLite
Code and Slides:
http://thillerson.googlecode.com
3 Takes on our Sweet App:
• SQLite C API
• fmdb + fmdb-migration-
manager
• Aptiva’s ActiveRecord
Tuesday, March 3, 2009

Persistence: SQLite
Code and Slides:
http://thillerson.googlecode.com
SQL C API:
http://www.sqlite.org/c3ref/
funclist.html
Tuesday, March 3, 2009

Persistence: SQLite
Code and Slides:
• fmdb - Thin Wrapper around SQLite
http://thillerson.googlecode.com
• fmdb-migration-manager - Rails-style
migrations using fmdb
• http://code.google.com/p/ ycode/
• http://github.com/mocra/fmdb-
migration-manager/
Tuesday, March 3, 2009

Persistence: SQLite
Code and Slides:
• Aptiva’s ActiveRecord
http://thillerson.googlecode.com
In software engineering, the active record pattern is a design
pattern frequently found in software that stores its data in
relational databases. It was named by Martin Fowler in his book
Patterns of Enterprise Application Architecture.
- http://en.wikipedia.org/wiki/Active_record_pattern
http://github.com/aptiva/
activerecord/
Tuesday, March 3, 2009

Persistence: SQLite
Code and Slides:
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Quick! To the CODES!
Tuesday, March 3, 2009

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Persistence: A Few Points
Take two, they’re small!
Tuesday, March 3, 2009

Persistence: Tips
Code and Slides:
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Consider how your
settings will be used
Tuesday, March 3, 2009

Persistence: Tips
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A database is an
implementation detail
Tuesday, March 3, 2009

Persistence: Tips
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Encapsulation is your
friend
Tuesday, March 3, 2009

Persistence: Tips
Code and Slides:
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Don’t forget to move your
database
Tuesday, March 3, 2009

Persistence: Tips
Code and Slides:
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SQLite write speed is
constrained by
transactions
Tuesday, March 3, 2009

Persistence: Tips
Code and Slides:
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SQLite uses duck-typing
Tuesday, March 3, 2009

Persistence: Tips
Code and Slides:
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FMDB:
executeQuery !=
executeUpdate
Tuesday, March 3, 2009

Persistence: Tips
Code and Slides:
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RTFS
Tuesday, March 3, 2009

Persistence: Thank you!
Tony Hillerson
Code and Slides:
Software Architect
http://thillerson.googlecode.com
slideshare.com/thillerson
github.com/thillerson
twitter.com/thillerson
brightkite.com/thillerson
EffectiveUI.com
Tuesday, March 3, 2009