Objective C & iOS Weak Singletons
Temporary shared memory management is always a bit of a difficult problem to solve. There are various well known ways of dealing with this problem but recently i’ve come across a novel solution to this problem that actual takes advantage of Objective C’s Automatic Reference Counting (although it could also work without ARC) The singleton pattern is used in quite a lot of applications i’ve worked on, usually it retains some objects in memory and can exist for the lifetime ...
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BSON – What, why, how ?
BSON is often referred as Binary JSON. BSON is the serialization of JSON-like objects that are binary encoded. Just like JSON, BSON also supports nested objects, arrays, strings, integers etc. BSON supports some more data types, especially raw binary data. So we can consider BSON as a super-set of JSON. BSON is designed to be fast to transport and fast to decode. The main features of BSON are: Traversable Light weight and Efficient Lets stop lecturing about BSON and move on to discussion regarding ...
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How to Populate a UITableView From a plist (property list)
Start a new “single view” project (I named it PopulateUITableView). Delete ViewController.h and ViewController.m from the project navigator (command+1). Open MainStoryboard.storyboard and delete the scene that came with the template. In the object library find a Table View Controller and drag it as a new scene. This is what the project should look like at this point. To manage the table view we need to create a new class TableViewController that is a s subclass of UITableViewController. (command+N) create a ...
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How to trace and debug an iOS crash (Part 1)
There has been a crash. While preparing for an iOS release, observed a crash on an iPad (iOS 4.3.3, WiFi). The crash was fairly consistent to be considered random but once in a while, it would work as expected. On the other hand, an iPad 3 (iOS 5.1, WiFi/3G) wouldn’t exhibit the same behaviour. The crash was triggered at the completion block of an AFHTTPRequestOperation while parsing a (JSON) response with an empty body to a NSDictionary using JSONKit. This ...
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Quick iOS Tip: Change the title of cancel button in UISearchBar
If you are writing a iOS app that contains of UITableView along with a UISearchBar, you might want to change the title of the cancel button, i.e. if you’re localizing your app.
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Getting information about your users – using Localytics in your app
You’ve been working on your new app for months. You have created your beta build and send the app out to your army of beta testers. Now that you have people playing your app how do you know how they are interacting with it? You could spend money and do focus group testing – gather a bunch of people at one place and actually look over their shoulder while they play. Seems kind of intrusive to me, but you need ...
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Implementing ads in your iOS Application
In iOS 4.0 Apple introduced the iAd framework, making it possible for iOS developers to include ads in their apps, and thereby earning revenue as the app users view or interact with the ads. But iAd isn’t available in all countries. At this time the iAd network is only available in: The U.S., U.K., France, Germany, Italy, Spain and Japan. If your primary customer base isn’t in one of the mentioned countries, don’t worry. There’s a lot of alternative ad-frameworks ...
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iOS: Opening doors effect after an app launches
There are a number of apps in the App Store that launch with a set of closed doors, these are then opened to present the actual UI underneath it. I had to create this effect for an app I wrote for a client http://itunes.com/apps/jkmuaythai I’d assumed when I started that this would be a relatively simple task, just take the initial default image, cut it in half and a simple bit of animation would move them out of the way. ...
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