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Understanding SQLite in iOS

From: iOS SDK and SQLite: Building Data-Driven Apps

Video: Understanding SQLite in iOS

SQLite is a full featured relational database. It's small, it's fast, it's lightweight, and it's perfectly suited for mobile applications. The SQLite Database Management System lives entirely in a driver. This means that there is no server and no client. You access the database directly. The database itself is fully contained in one file. This makes it very convenient to use in a mobile environment. To say that iOS supports SQLite natively is to say that the driver is built-in, the interface to the driver is written in C, so it's not Object Oriented, and it's not an Objective-C Interface.

Understanding SQLite in iOS

SQLite is a full featured relational database. It's small, it's fast, it's lightweight, and it's perfectly suited for mobile applications. The SQLite Database Management System lives entirely in a driver. This means that there is no server and no client. You access the database directly. The database itself is fully contained in one file. This makes it very convenient to use in a mobile environment. To say that iOS supports SQLite natively is to say that the driver is built-in, the interface to the driver is written in C, so it's not Object Oriented, and it's not an Objective-C Interface.

To make it easier to use, we will build a Native Object Oriented Interface for SQLite in Objective-C. This kind of interface is sometimes called a Wrapper as it wraps one interface around another. It's designed to be convenient and easy for our development purposes. It's general purpose, so you can use it in your future projects. You have the source code, and you may modify it and expand it to suite your needs. To further support the iOS Model-View-Controller architecture, we will build a more specific interface on top of our general interface.

We will do this by subclassing our general interface and adding methods to specifically support this application. This makes it very easy for us to integrate the database into our application. Subclassing a normalized interface like this is a common and valuable technique in an object-oriented environment. As you follow along with the development process in this chapter, think about how you will use and expand on these techniques in your own projects.

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iOS SDK and SQLite: Building Data-Driven Apps

41 video lessons · 6417 viewers

Bill Weinman
Author

 
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  1. 8m 29s
    1. Welcome
      57s
    2. Exercise files
      2m 17s
    3. Course overview
      3m 4s
    4. Application overview
      2m 11s
  2. 14m 49s
    1. Prototyping in a testbed
      1m 27s
    2. Building the view controller
      3m 45s
    3. Coding the testbed
      7m 56s
    4. Using the testbed
      1m 41s
  3. 37m 49s
    1. Understanding SQLite in iOS
      1m 41s
    2. Creating an Objective-C interface for SQLite
      9m 57s
    3. Testing the BWDB interface in the sandbox
      7m 1s
    4. Designing a database schema
      8m 7s
    5. Supporting the application with a specific interface
      7m 7s
    6. Using C pointers with automatic reference counting (ARC)
      3m 56s
  4. 21m 18s
    1. Understanding the table view
      1m 33s
    2. Creating the view controller
      6m 39s
    3. Reading from the database
      13m 6s
  5. 33m 50s
    1. Understanding the parsing process
      1m 57s
    2. Creating the item view controller
      12m 25s
    3. Reading data from the internet
      5m 30s
    4. Parsing the feed with NSXMLParser
      8m 2s
    5. Updating the item view with the feed items
      5m 56s
  6. 40m 14s
    1. Understanding the modal view
      1m 47s
    2. Constructing the view controller
      15m 5s
    3. Finding a feed link in a web page
      8m 55s
    4. Parsing the feed with NSXMLParser
      5m 4s
    5. Delegating back to the parent view
      6m 11s
    6. Deleting feeds
      3m 12s
  7. 21m 5s
    1. Creating the web view class
      12m 33s
    2. Coding the web view
      5m 25s
    3. Viewing pages in Safari
      3m 7s
  8. 14m 3s
    1. Understanding the iOS preferences system
      1m 23s
    2. Creating the preferences plist in Xcode
      7m 20s
    3. Reading preferences in your application
      5m 20s
  9. 6m 15s
    1. Adding pull-to-refresh functionality
      2m 34s
    2. Implementing the pull-to-refresh gesture for iOS 6
      3m 41s
  10. 27m 1s
    1. Understanding split view
      1m 4s
    2. Coding the table views
      11m 24s
    3. Implementing the iPad detail view
      6m 35s
    4. Implementing the iPad modal view
      7m 58s
  11. 35s
    1. Goodbye
      35s

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