markjnet

iPhone Conference 360 iDev San Jose April 2010

markj — Wed, 03 Feb 2010 19:23:39 +0000

Are you going to 360 iDev San Jose in April? Its by far the best iPhone developers conference I know of. It will be packed with iPhone insider knowledge and will be totally fun. At $599 for 4 days with 40 sessions and a killer $99 hotel package its amazing value...

Tweeting from an Ad on the iPhone Using URL Schemes

markj — Tue, 19 Jan 2010 04:00:31 +0000

Lately I’ve been experimenting with promoting out app ‘Friend Focus (for Facebook)‘ by ‘turning out the vote’ – ie getting our existing users to help us promote Focus. Once I’ve found a formula that works well we’ll implement the scheme in app and figure out a way to reward users for helping us, but for [...]

iPhone Memory Debugging with NSZombie and Instruments

markj — Thu, 14 Jan 2010 22:34:29 +0000

How to debug memory crashes in your iPhone app using Instruments and NSZombie. If your app is crashing with 'BAD ACCESS' its because your retains and releases are screwed up and you are calling a method on an object you already deleted. This is the easiest technique to figure the problem out.

Focus for Facebook iPhone App

markj — Tue, 08 Dec 2009 01:48:00 +0000

Focus for Facebook is a new free iPhone app that streamlines facebook while you're on-the-go. It features an app spam filter to automatically filter out posts from games and quizes, and it shows your facebook in a compact view so you can quickly scan through new post & comments to see what you want to read, and then 'mark all as read' when you're done.

Debugging Tip – objc_exception_throw breakpoint

markj — Sat, 29 Aug 2009 18:04:36 +0000

If an exception is thrown when debugging an iPhone app, without your own exception handling code, that exception won’t stop the debugger until the call stack has totally unwound. On that journey through the call stack it gets caught and disguarded in the event loop. That’s a bummer because then the debugger can’t show you [...]

Memory Management Basics Tutorial Video

markj — Sun, 19 Jul 2009 00:27:38 +0000

This article is a screen cast video of my tutorial for beginner iPhone programmers, it’s about the basics of memory management in Objective-C. Memory management is a tough nut for the beginner to crack, particularly in Objective-C and Cocoa for iPhone. Check out my iPhone memory management reading list for more voices on memory management. The [...]

iPhone Memory Management Reading List

markj — Sun, 19 Jul 2009 00:27:08 +0000

It's a topic that can be explained several different ways, so keep reading and experimenting till it clicks for you.

... Books Learn Objective-C on the Mac Cocoa Programming for Mac Programming in Objective-C Online Practical Memory Management from Apple Memory Management Guide from Apple Dr Dobbs Mac Developer Tips Memo.tv mauvilasoftware.com Stepwise.com Tristan O'Tierney Mac Developer Network Video O'Reilly and here Cocoa Dev Central Cocoa Dev HyperJeff's list of resources WikiBooks Devplace Woojijuice Peter Dikant

6 Months of iPhone App Sales Stats, Cause and Effect.

markj — Tue, 19 May 2009 17:32:49 +0000

Hit Tennis has been out for six months now, and here I share sales figures for those six months. Recently sales have been in decline, but I managed to boost sales over the last month with a variety of marketing tactics: price drop to 99c, release date trick, translation into French, hitting the top 100 paid games...

Fixing Blurry Subviews

markj — Sun, 17 May 2009 21:29:18 +0000

Custom UIs on the iPhone are made from UIView containing subviews, I ran across a problem where the subviews were being draw with an annoying blur. Here's what was happening and how to fix it...

Understanding App Store Top 100s

markj — Tue, 12 May 2009 23:35:01 +0000

Understanding the unique ways the app store works is critical in deciding app store marketing tactics and understanding the spikes and drops in app sales figures. This article explores how the top 100 lists in the app store work, and a future posting will look at how this applies to real sales data.