Codesign Installer package for distribution outside the Mac App Store

Sometimes you need to distribute your application installers outside Mac App Store. You can code sign it so that it will be recognized by Gatekeeper as identified developer product. Once you code sign the installer with your Apple Developer Id certificate, gatekeeper will allow to open the installer, otherwise it will show a dialog saying “The app cannot be opened because it is from an unidentified developer” (if gatekeeper settings are set to ‘Mac App store and identified developers’).

To know more about Gatekeeper options click here.

Here we will see how to sign the installer package so that gatekeeper won’t block it.

The installers created by PackageMaker with minimum target set to 10.5 and above are flat package while the installers created with minimum target set to 10.4 will create a bundle package.

Bundle type installers cannot be signed using Developer Id Installer certificate. These can be signed using Developer Id Application certificate, but gatekeeper does not pass it.

To sign a flat type installer first you need to enroll to Mac Developer Program and download your Developer Id Installer certificate. Double click the downloaded certificate to load it to keychain.

Now once you have the certificate in your keychain, you may check it via KeyChain Access. The certificate will be named like “Developer ID Installer: Any Name”.

To code-sign your installer package, run the following command in terminal:

productsign –timestamp=none –sign “Your Certificate Name” “/path/and/name/of/the/unsigned/installer” “path/and/name/of/signed/installer

For example, in my case

productsign –timestamp=none –sign “Developer ID Installer: Neha Gupta” “/myApp.pkg” “/signed/myApp.pkg”

The new installer created will be signed by your installer certificate and will be recognized by gatekeeper as a identified developer product. To check the certificate by which package is signed, launch the signed installer package and click the lock sign on the upper right corner.

Written By: Neha Gupta

Round Cornered Views

mac developers

Custom NSView with rounded corner:

To draw a custom view with its one or more corners round, all you need to do is draw a bezier path of the required shape in the view’s drawRect: method.
Also, this can be used to customize any NSView subclassed objects as  NSTextView, NSTextField etc.
Here I present the code to create a text field with any one round corner as shown in the image below. The code can be easily changed to create more than one round corners of a view.

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Circular Progress Bar

mac developers

Circular progress indicatorWe  all are familiar with native progress bar but a circular progress bar might be required in a project. In circular progress bar, progress of process will be shown by a bar filling in clockwise or anti-clockwise direction. Here I am providing the code to create a circular progress bar as shown in the image below:

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Protocol Buffers with Objective-C

mac developers

What are Protocol Buffers? Protocol Buffers are a way of encoding structured data. Protocol buffers are a flexible, efficient, automated mechanism for serializing structured data like XML, but smaller, faster, and simpler. You define how you want your data to be structured once, then you can use special generated source code to easily write and read your structured data to and from a variety of data streams and using a variety of languages. You can even update your data structure without breaking deployed programs that are compiled against the “old” format.

How to use Protocol Buffers with Objective C?

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How to get selected text and its coordinates from any system wide application using Accessibility API?

mac developers

In my previous post, I had discussed about accessing the text value from any system wide application by using Accessibility API. Now going further,  you may want to access only the selected text or the position of selected text, we will discuss about it in this article.

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Accessing text value from any System wide Application via Accessibility API

mac developers

Suppose, I want to create a application which will monitor the typing and say if “macdevelopers” is typed anywhere be it in TextEdit or Mail etc. the application will perform a operation for example automatically opening the website in a browser.

The text value from any System wide Application can be accessed using the Accessibility API. In this article I will discuss about accessing the text value from any application like Text Edit or other applications if its current focused element is some text field or text view in it. Thus using this you can implement the functionality to access the active application’s text field value.

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Undo/Redo in a Cocoa Application (Example to Undo/Redo addition & deletion of rows in a table view)

mac developers

Undo/Redo functionality in a Cocoa application – NSUndoManager

This article will give you an overview of adding undo and redo functionality to a cocoa application by an example that undo/redo addition and deletion of rows in a TableView.

Lets start with How Undo Manager works?
As per Apple’s Reference Guide “You register an undo operation by specifying the object that’s changing (or the owner of that object), along with a method to invoke to revert its state, and the arguments for that method. When performing undo an NSUndoManager saves the operations reverted so that you can redo the undos.”

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