iPhone SDK Articles

NULL or nil?

JK — Tue, 30 Aug 2011 03:04:36 +0000

In Cocoa both of them are typedef to zero. nil is an object pointer, whereas NULL is a c pointer. If you want to set char * to 0 then you would set it to NULL and if you want to set a view controller to 0 then you would set it to nil. Cocoa [...]

Drill down table view with a detail view

JK — Sun, 29 Mar 2009 16:04:00 +0000

Since I published my drill down table view tutorial, I got a lot of positive feedback but with one common request. How do I load a different detail view for an item or how do I load a UITabBarController in the detail view. In this tutorial I will show how to load a different detail [...]

SQLite and CoreData

JK — Sat, 28 Mar 2009 01:18:00 +0000

Yes, Apple has finally ported Core Data to the iPhone which means using SQLite in an application is not the best approach. Once the OS 3.0 is officially released, I will be posting more tutorials on using Core Data. Thank you for all your continued support.

Yes, Apple has finally ported Core [...]

UITableView – Drill down table view tutorial

JK — Sun, 08 Mar 2009 17:40:00 +0000

Until now we saw how to create a simple table but there are times when we need to show another table view when a row is selected. This kind of a flow is called “drill down” and in this tutorial we learn how to create a drill down table view. Click on “Read more…” to [...]

SQLite Tutorial – Saving images in the database

JK — Thu, 12 Feb 2009 03:10:00 +0000

There maybe times when you need to save more than just text in the database, like a file or an image. SQLite versions 3.0 and later allows you to store BLOB data in a column. Using the data type BLOB we can store large objects like an image or a file. Read on to learn [...]

UITableView – Adding subviews to a cell’s content view

JK — Sun, 01 Feb 2009 19:16:00 +0000

Using the default UITableViewCell we can display a text or an image but sometimes it is not good enough. In this tutorial you will learn how to customize the UITableViewCell.

UITableView – Creating a simple table view UITableView – Loading a detail view UITableView – Sectioned table view UITableView – [...]

UIPickerView – Creating a simple picker view

JK — Sat, 24 Jan 2009 20:42:00 +0000

Apple provides a control knows as the UIPickerView, with which a user can select an item from a list. In this tutorial you will learn how to create a simple picker view. Click on “Read more…” to continue

Introduction

The picker view lets the user select an item from a list. In [...]

UITableView – Indexed table view

JK — Sat, 24 Jan 2009 17:27:00 +0000

In this tutorial you will learn how to create a simple index for the table view. This index view shows up on the right side, just like the contacts application. Click on “Read more…” to learn more

UITableView – Creating a simple table view UITableView – Loading a detail view UITableView [...]

UITableView – Searching table view

JK — Sun, 18 Jan 2009 23:23:00 +0000

If the user has to scroll often to get to access the data, providing a search bar to search the table view helps in making the process faster. To learn more on searching, click on “Read more”…

UITableView – Creating a simple table view UITableView – Loading a detail view UITableView [...]

UITableView – Sectioned Table View

JK — Sun, 18 Jan 2009 22:24:00 +0000

Sometimes it makes sense to group information and show it to the user. In this tutorial, you will learn how to create a simple sectioned table view. Click on “Read more” to learn more…

UITableView – Creating a simple table view UITableView – Loading a detail view UITableView – Sectioned Table View [...]