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Welcome back to another update to the . If you’re not familiar with this class I’d suggest you check out the following posts:
Cloning UIImagePickerController using the Assets Library Framework
Update: ELCImagePickerController
A lot has happened in the iOS world since the creation of this code. With the advent of every new version of iOS there are always exciting new features and bug fixes. Sometimes subtle code changes sneak into classes we’ve …
Introduction
In today’s post, we are going to be discussing view controllers. Let’s start by talking about what a view controller is and it’s role in your iOS projects.
What is a View Controller?
View Controllers are at the core of every application. They act as sort of the glue between your models and your views. View controllers are both responsible for fetching/initializing your models as well as loading up your views to display the information within them.
Basic View Controllers
Every …
Subclassing is something any object oriented programmer is pretty familiar with. Common examples would be that a square is a subclass of a rectangle. This means that all squares are rectangles, and hold all properties of rectangles but not all rectangles are squares. Squares are a special subset of rectangles that have both sides being the same length. Objective-C has become so evolved that you may use this simplified conceptualization for all objects in Objective-C when in reality there is …
Often times you find yourself in a situation where you might want to control your application remotely. You may want to enable/disable features at a certain time, push messages to all of your users, or do some cross promotion whenever you launch a new application. All of this can easily be done with a little JSON and some simple web interface coding.
In this tutorial, I will show you how to use ASIHTTPRequest along with JSONKIT to fetch, parse, …
For the past few years, I have been attending a fantastic conference put on by Pearson Education. The conference is called . It’s a 2 day event (3 if you do the additional workshops), where you will learn about cutting edge iOS development from many of the leaders in the space.
Well, this year is no different, and on November 12th, Pearson will be putting on another one of these conferences at the Harvard Medical Center in Boston. …
In the recent months, I have had a few separate applications that required a “timeout”. What I mean by this is, the application should log the user out if they haven’t touched the screen in X number of minutes. There are quite a few uses for this, but the best use is when you have an application that contains sensitive data in a shared environment.
For example, say your company uses iPads to collect feedback from your …
Have you ever looked at the enumerateObjectsUsingBlock method of NSArray and wondered how you might use that design pattern in your own application. In this tutorial, I will be showing you how to do just this. We will be writing methods that accept blocks as arguments as well as learning how to declare block ivars and properties.
This tutorial assumes that you have at least a basic understanding of using blocks and Grand Central Dispatch (GCD). If not, …
Hello iCoders,
I have a quick tip today that I have been using in some of my development that you guys may find helpful in yours. Lately I’ve been developing a Framework. We mentioned a little something about it earlier here on iCodeBlog. When developing a .framework, a lot of times during my work I couldn’t place break points in the code and had to rely mostly on NSLog. NSLog however really wasn’t doing the job for me. So I …
The iPhone 4’s front camera is limited to 640×480 resolution. Although handy for video conferencing, for some apps that’s to small to yield a usable photo. Unfortunately the UIImagePickerController class does not have an option to restrict the user from using the front camera. Although you can check the size of the photo after the user is finished, it’s not great user experience to reject it after they go through the entire process of taking a photo.
One option is to …