Open Radar

 
Summary:
Using IKSlideshow will cause your application to hang if run with garbage collection enabled

Steps to Reproduce:
1. Open the attached project in Xcode, then click Build and Run.
2. Click the "play" button in the upper right corner of the window of the running application to start a slideshow
3. Once the slideshow is running, click the "X" button to stop the slideshow

Expected Results:
The slideshow should stop and return to the application, where you should then be able to perform other actions

Actual Results:
The application hangs indefinitely and requires being force quit

Regression:
This behavior only appears if garbage collection is enabled for the application. Everything works fine if you build the same application with GC off.

Notes:
The included project is a modified version of step 8 from the ImageKitDemo available on Apple's website at <http://developer.apple.com/mac/library/samplecode/ImageKitDemo/>.  The only change that was made was to enable garbage collection in the build settings for the application target in the project.