为具有多个目标和不同平台的项目编写Podfile

I am preparing a pod that supports OS X and iOS. My pod has some dependencies of its own, which are defined in the podspec file, so I'm using a Podfile to manage the dependencies of the project that I'm using to develop the pod and run tests. I'm using CocoaPods 0.33.1.I am preparing a pod that supports OS X and iOS