Core Data Relationship Saving

Question

I am trying to figure out how to use Core Data with relationships. I have used Core Data before, but only the very basics sans relationships (which worked for my needs at the time).

I have a Trip entity that can have many Node s. When the user presses a "Start" button, I want to initialize the Trip entity and start storing all of the Node s inside of that Trip , and then when the user presses a "Stop" button, I want it to calculate all of the Trip attributes and store it all together. How do I save with respect to these entities?

Answer 1

使用IDE生成MO子类，它将创建用于设置nodeInTrip和tripsInNode关系的方法。