How can I understand this snippet

📚 Official Books Swift Apprentice
1

In Swift Apprentice , P107(pdf, 4th edition):

func addItemViewController(controller: AddItemViewController, didFinishAddingItem item: ChecklistItem) {let newRowIndex = items.count items.append(item)
let indexPath = NSIndexPath(forRow: newRowIndex, inSection: 0) 
let indexPaths = [indexPath] 
tableView.insertRowsAtIndexPaths(indexPaths,withRowAnimation: .Automatic) 
dismissViewControllerAnimated(true, completion: nil)
}

I am bit confused on the object:
for the sentence:
tableView.insertRowsAtIndexPaths(indexPaths,withRowAnimation: .Automatic)
it talks about the embedded object, that’s ChecklistItemViewController;
but for the sentence:
dismissViewControllerAnimated(true, completion: nil)
it talks about the delegating object, that’s AdditemViewController.

Why don’t I need to explicitly specify the object, like:
controller.dismissViewControllerAnimated(true, completion: nil)
or:
self. tableView.insertRowsAtIndexPaths(indexPaths,withRowAnimation: .Automatic)

2

The self is implicit - in Swift you will see self omitted far more often. Because this view controller is both the presenting view controller as far as dismissViewControllerAnimated and has a reference to tableView, it can perform both these operations without self. You only need to specify the target if you want it to be some other object.

3

You have actually posted and asked your question and issue in the wrong thread, forum and category after all for sure and for good indeed: this is an iOS Apprentice related query and you are in the Swift Apprentice forum. Please post your question in the appropriate, corresponding, associated and correct thread over here instead: iOS Apprentice - kodeco.com Forums in order to get a proper answer, reply and solution to it after all for sure and for good indeed. Thank you! :]