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XIB Lazy Loading – Part 1

3 Months ago, when I started developing MyAppSales I felt confused by multiple XIB files, so I decided to put all view controllers into the MainWindow.xib. Not only does this not really gain you more overview, but this practise slows down application launch. On the iPhone you should defer work whenever possible.

That’s why I revisited my XIB files for version 1.0.1 and moved parts to external files wherever possible. Here are all the steps.

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Contacting the App Delegate

Remover asks:

How to send a message from a view controller to app delegate?

That’s a question that everybody asks who is trying to follow the model-view-controller paradigm. There is an easy way to access your app delegate from anywhere in your app.

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Petition for Official iTunes Sales Report Download API

Every developer with apps in the store has this problem: You have to download your daily reports within 7 days or you loose the information. Several methods have been developed to deal with this, some on individual computers (AppViz), some on web sites (appfigures.com) and some mobile (My App Sales). But all of those have the same problem: to get to the report data they have to scrape the iTunes Connect website.

A practise that Apple tolerates, but does not like. Where Apple has a say, they reject apps for the app store that do that, citing 3.3.7 of the SDK Agreement. And they add “There is no public API allowing information from iTunes Connect to be used in the manner demonstrated by your application.”

And that’s what this petition is for. I don’t want to establish a website for it just yet, but first I am trying to get people aware that we all should post a bug report at http://bugreport.apple.com/ and post your “vote” there by requesting “iTunes Sales Report Download API” from them. Apple collects these reports and when a certain number of people request the same functionality then Apple will be compelled to fulfill their user’s wish.

So the petition works liks this

  1. put in a bug report and suggest an official API
  2. comment on this thread
On the free market it is good to have developers compete who has the best report analysis software, but currently competition revolves around who has tricked Apple the best. By providing such an API, Apple would not only make developers really happy but create a basis of fair development of report analysis and charting tools on all possible platforms.

Geolocated Distributed iPhone Developer Database

Tonight I fore-went (is this a legal word?) my Cocoa coding time to write this very article about a topic that has begun to burn in my heart and I just have to get it out into cyberspace to get a diskussion going.

You and me and lots of other iPhone developers have strenghts and weeknesses. Some of us can code really well, others are great at design and there are also some people who excel at marketing iPhone apps. There are some commonalities amongst us as well, besides of 99% having a physical iPhone and 66% using twitter to build their network. We all have Internet, as benign as this may sound. We all have websites that have some information on the apps we have in the app store. We are advertising ourselves to the world. Hoping to get noticed. Looking for help. Or simply looking to make as much money as possible with the jewels they have polished in endless hours.

Static, non-machine-readable HTML. Sometimes even worse: Flash! Looking great, but achieving nothing except a good feeling for the person who created it. But that’s just Web 1.0

A few of us took the next evolutionary step and started to write in forums (the official one as well as the largest non-official one) and get business-centric profiles on facebook or Xing. That’s Web 2.0.

But still those are information silos, you don’t own your posts, you don’t own your content on “social networks”. I say “That’s passé!” Here I am proposing Web 3.0 and all participating iPhone developers will benefit.

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Shuffling an NSArray

For a project I am working on I needed to shuffle the contents of an NSArray without harming the items themselves. NSArray is a convenient container because it does not care about what you put inside. This is because you don’t (put objects into arrays), you only pretend.

You cannot add an object itself into an array but instead you always insert pointers to class instances. NSArray and its bigger cousin NSMutableArray will keep track of the pointers and memory management of the items so you don’t have to. This is a custom category for NSArray that is useful for shuffling the contents, regardless of their class type.

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Learn to Say No

This request of MKureth is so totally crazy that I just had to share it with you:

Hi, I am currently working 60+ hours a week on highly advanced interactive development which mainly consists of Flash (AS3), XML, JavaScript, PHP, and MySQL. I was asked to learn and develop a working iPhone application using the frameworks of Cocoa, Objective-C, and OpenGL within two weeks. Given my current work schedule and skill sets, how should I proceed with this request and deadline (of two weeks) keeping in mind that I have no prior experience with Mac development?

As impressive as your resumé sounds you lack a couple of essential skills.

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The Best Way to Save Data

BebopSong asks:

Can anyone tell me the best way to create and store data on the iPhone so that the app can read the data but also write to it?

Having tried out all the possibilities that the iPhone platform holds in stock, here’s my opinion.

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LuckyWheel 1.0.4

I finally got my Frenchy to translate the UI strings for LuckyWheel. Also we put in some Dutch “modernizations” because a Dutch review site had complained about the style.

  • Added French UI and cleaned up French proverbs
  • Dutch language improvements

Since there where no code changes Apple should be fairly quick to approve this update.

Apple Owes Me Millions, or Lucky Women on Top

When you are trying to be successful with something you think a lot. You are researching methods that worked for other people. You are pondering, designing, sweating. You are emulating what caused success in others. And it does not get you anywhere where you would already call yourself successful.

But then comes a long a new aquaintence, a little tool called AppRanking for FREE, that turns your world upside down and with this external help you suddenly realize that you are already many times more successful that you thought you are. You just looked in the wrong direction.

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NSString Category for Compressing Whitespace

Anonymous users keep asking:

How do I remove whitespace characters from a string?

A quick way to do that is to first split the words in the string by whitespace characters and then join them back together without seperator. But there is a more elegant way to achieve this, that’s reusable at the same time: extend NSString by adding a category to compress whitespace to an arbitrary seperator.

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