iPhone and iPad development

"The Square Engineering Blog has a great article on Smoother Signatures for Android, but I didn't find anything specifically about iOS. So, what is the best way to capture a users signature on an iOS device?

Although I didn't find any articles on signature capture, there are good implementations on the App Store. My target user experience was the iPad application Paper by 53, a drawing application with beautiful and responsive brushes.

All code is available in the Github repository: SignatureDemo."

WSCoachMarksView is an iOS drop-in class that displays user coach marks with a rectangular cutout over an existing UI. This approach leverages your actual UI as part of the onboarding process for your user. Simply define an array of rectangles (CGRect) and their accompanying captions.

Wolfpack is an image processing library for iOS and OS X. With the vast improvements to Core Image brought on by iOS 6, working with images on the iPhone and iPad has never been easier.

This is a total work in progress.

• blur: A gaussian blur
• color: Apply a color blend
• adjustment: Apply image adjustments like brightness, contrast, etc
• curve: [Not Implemented Yet]
• gradient: Supports a gradientType of either linear or radial
• image: Overlay an image using a specific blending mode.
• script: [Not Implemented Yet]
• CoreImage: A free-form CoreImage action that you can use with any supported CIFilter.

We wanted to be able to take advantage of Markdown on mobile devices but all of the implementations that we found were either slow, feature incomplete or bot.

Bypass uses libsoldout to parse the Markdown and build a data structure. This data gets passed through the respective binding layer on each platform and is used to build the formatted text (Spanned strings on Android and Attributed Strings on iOS).

A collapsible list that functions like a UITableView, except you can collapse and open cells on a click. Feed it UIViews for what is shown when each cell is open. Works via delegation similar to UITableView. This is a UIScrollView Subclass.

Presents values in a custom gauge-style meter view with delightful animations

It should be easy to fill a shape with a color, to visually reflect a percentage.

There is plenty of examples where it can be useful:

• simple progress bar view
• stars rating view
• emotion view
• trend value view

LBActionSheet is a drop-in replacement for UIActionSheet. However, its API makes it very easy to customize it. It's designed for this sole purpose only which makes it redundant when you don't need to implement a custom theme.

Harpy is a utility that checks a user's currently installed version of your iOS application against the version that is currently available in the AppStore. If a new version is available, an instance of UIAlertView is presented to the user informing them of the newer version, and giving them the option to update the application.

Replicates functionality of SLComposeViewController introduced in iOS 6.0. You can create composers for any social network out there. REComposeViewController doesn't provide logic for sharing, only its visual part.

A simple web browser with a few customization options. There's no documentation at this point, but the gist is pretty simple. There's plenty that could be done to make it better, but it's functional. Requires ARC.

A project based off Erik M. Buck's code, available from http://www.informit.com/articles/article.aspx?p=1946398.

All credit goes to this guy, I just tweaked the code so that I can run it on a retina iPad.

Changes I have made: Remove a lot of code that was unreachable. Made the vertex shader more discerning re: green color. i.e. the pixel has to be more green than before to become transparent. Stops things like yellow being semi transparent. Added support for retina devices.