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This is the second article for our Core Data series.Previously, we gave you a brief introduction of Core Data and created a simple app to store all your device information.To switch priority of the tasks, we could have used a detail inspector view, action sheet or cell swiping.Those are examples of indirect manipulation, making the user need to realize that changing an attribute of the task, results in the task being reorganized in the list., because it makes data driven animations so easy to implement.Moving things around is how we organize in the physical world, which is why spatial position and animation of it is such an intuitive metaphor for dealing with digital objects.This segue is used to connect a table cell and the detail view controller.When user selects any device in the table view, the detail view controller will be displayed to show the information of the selected device. If you try to edit the information of an existing device, it will not update the device information properly.
Instead we have to remember to manually trigger an update when doing drag 'n' drop or marking a todo as done.
But for those who do not want to start from the very beginning, you can download this Xcode project to continue to work on the below tutorial.