Now let’s get started with your application. In Xcode, create a new single view universal project and name it TouchTracker (Figure 18.2).
In building TouchTracker, you are going to use the default view controller and the storyboard that the template created. For its view and model layers, you are going to create a custom view class and a custom structure. Figure 18.3 shows the major pieces of TouchTracker.
Let’s begin with your custom struct.