• Instagram Engineering
• What Powers Instagram: Hundreds of Instances, Dozens of Technologies
• The Instagram Architecture Facebook Bought For A Cool Billion Dollars
• Mike Krieger, Instagram at the Airbnb tech talk, on Scaling Instagram
• Secrets to Lightning Fast Mobile Design
• 8 Things Instagram Did Right

99.9% of support emails are complaining their device isn’t supported. We currently support 707 devices. Mindblowing.

— Natalia Luckyanova (@nattylux) March 27, 2012

Apple published a great doc for newcomers. It’s also a good source of links and articles for all the basics in iOS, from enrolling as developer to publish your first app.

Find all related docs links below:

• Tutorial: Your first iOS app
• Manage your workflow in XCode
• Write Objective-C code
• Acquire basic programming skills
• Survey the major frameworks
• Integrate your code with the frameworks
• Streamline your app with design patterns
• Design with the user in mind
• Design your app with care
• Know the core objects of your app
• Prepare for App Store submission
• Find documentation quickly
• iOS technology overview
• iOS Human Interface Guidelines
• Developing for the App Store
• The Objective-C programming language
• Concepts in Objective-C programming
• iOS App Programming Guide
• App Store Review Guidelines

$ make-ssl-cert generate-default-snakeoil --force-overwrite

It creates the following files:

• /etc/ssl/private/ssl-cert-snakeoil.key
• /etc/ssl/certs/ssl-cert-snakeoil.pem

Activate Apache SSL module:

$ a2enmod ssl

Activate Apache default ssl virtual host:

$ a2ensite default-ssl

Restart Apache:

/etc/init.d/apache2 restart

You should now see the following page on your webserver:

It works!

This is the default web page for this server.

The web server software is running but no content has been added, yet.

My jailbroken device was on a 3.1.3 firmware with Cydia installed. After trying different 4.x firmwares, I googled this error message and found an interesting thread here.

I followed their advice and it worked:

• Install TinyUmbrella,
• Clicked on my device,
• went to Advanced tab and unchecked “Request SHSH from Cydia”,
• Started TSS Server,
• Entered Recovery,
• and finally in iTunes clicked on Restore (with option key) and selected a 4.1 firmware,
• done!

The new Fall 2011 courses from Stanford on iTunes U are available!

Courses by Paul Hegardy released with a Creative Commons BY-NC-ND license in full HD.

7 courses are available:

• MVC and Introduction to Objective-C
• My first iOS App
• Objective-C
• Views
• Protocols and Gestures
• Multiple MVCs and Segues
• iPad Apps

• EXC_BAD_ACCESS and no stack trace == more quality time lost in Xcode

• iOS device and OS version stats from Instapaper 3.0 2011-03-24
• is it worth supporting iOS 3 in 2011? 2011-03-20
• What proportion of all iPhone owners use iOS 4.x today? 2011-01-18
• 61% of iPads already running iOS 4 2011-01-07