Cocoanetics

Radar: Enumerating NSAttributedString Attributes on Multiple Threads causes EXC_BAD_ACCESS

Oct 03, 2013

This bug has been causing me grief for the last month or so, as it was hard to pin down without a concrete use case that can reliably reproduce it. GitHub user brovador finally was able to narrow it down to be able to repro it every time.

There appears to be a bug in NSAttributedString that causes an EXC_BAD_ACCESS if you try to enumerate certain attributes over a longer range on two separate attributed strings from two background threads.

I filed it as rdar://15139980 and on Open Radar. The sample is the DTCoreTextExceptionExample on our Radar Samples GitHub repo.

5 Comments

Xcode Coverage

Oct 01, 2013

Code Coverage is described on Wikipedia as:

… a measure used to describe the degree to which the source code of a program is tested by a particular test suite. A program with high code coverage has been more thoroughly tested and has a lower chance of containing software bugs than a program with low code coverage.

Less bugs? Yes, please!

17 Comments

TopLayoutGuide 97 Pixels?!

Sep 28, 2013

When implementing iOS 7 support for a client’s app I got a result that might stump even seasoned Cocoa programmers.

On iOS 7 views generally go behind translucent bars. To still get your views aligned correctly – when creating them in code – you have to get the responsible view controller’s top and bottom layout guides.

Those get set sometime before viewWillLayoutSubviews and I found it useful to add a viewInset property to the view controller’s base view. Setting this would setNeedsLayout and then you can rearrange the subviews according to the new insets in layoutSubviews.

7 Comments

Radar: Xcode 5 unable to configure inline Unit Tests for iOS and Mac in parallel

Sep 26, 2013

The following issue is a head scratcher if you are trying to add unit tests to your project that both run on Mac and iOS. And if you like to use the new inline buttons for executing individual tests.

Filed as rdar://15085316 and Open Radar. The mentioned sample project is the UnitTestTest sample on our Radar Samples GitHub repo.

4 Comments

Radar: Device shuts down even though 19% battery left

Sep 23, 2013

I’m seeing this issue on my main phone after having begun to use the iOS 7 GM on it.

Filed as rdar://15056186 and on Open Radar.

8 Comments

DTCoreText 1.6.7

Sep 20, 2013

Following the public availability of iOS 7 and having collected a good amount of fixes, I felt that it is a good time to release the next maintenance update to DTCoreText.

6 Comments

Welcome to iOS 7 … Issues

Sep 19, 2013

All the while during the iOS 7 BETA phase I’ve been filing Radars and produced samples to go with them to demonstrate the issue to Apple engineers. I wasn’t allowed to blog about these until the general release of iOS 7 and so I kept collecting them in a special folder on my dropbox.

Now that iOS 7 is out I am able to add the samples to my public Radar Samples repo on GitHub. I hope that they can be a good example of how to create samples that allow Apple engineers to quickly reproduce and debug those issues.

19 Comments

MailChimp Launches iPad Editor

Sep 13, 2013

More than 3 million people use MailChimp to design and send email marketing campaigns. And today they launched a native iPad client that lets you create and edit such campaigns. For the parts of that which require rich text editing they rely on our DTRichTextEditor component.

8 Comments

BarCodeKit 1.1.0

Sep 09, 2013

As of this version BarCodeKit gains implementations for all of the most important 1D symbologies. Most of the work on this release was done by Jaanus Siim and Geoff Breemer in exchange for licenses to use this library for their own projects. BarCodeKit 1.1 is a free update for existing users and available for purchase on our Parts Store.
Read more

6 Comments

Implicit IVAR Synthesis

Sep 07, 2013

Apple recently added the ability for Xcode to automatically create instance variables for you. This means you no longer need to add an @synthesize for each property you create.

But does it really do that always, or are there scenarios where no _ivar is needed? Are there situations wehre you do need an explicit synthesis? For example what about properties which are just passing through values to a sub-object?

I wanted to know, so I experimented a bit. I even filed a Radar with Apple for clarification which came back with a good explanation.

21 Comments

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