# Clock Implement a clock that handles times without dates. You should be able to add and subtract minutes to it. Two clocks that represent the same time should be equal to each other. ## Setup There are two different methods of getting set up to run the tests with Objective-C: - Create an Xcode project with a test target which will run the tests. - Use the ruby gem `objc` as a test runner utility. Both are described in more detail here: http://exercism.io/languages/objective-c ### Submitting Exercises When submitting an exercise, make sure your solution file is in the same directory as the test code. The submit command will look something like: ```shell exercism submit /objective-c/clock/Clock.m ``` You can find the Exercism workspace by running `exercism debug` and looking for the line beginning with Workspace. ## Source Pairing session with Erin Drummond [https://twitter.com/ebdrummond](https://twitter.com/ebdrummond) ## Submitting Incomplete Solutions It's possible to submit an incomplete solution so you can see how others have completed the exercise.