When do the table dataSource methods invoke for the first time in the lifecycle?

Question

For example when the numberOfRowsInSection method is called rather than when explicitly calling reloadData()

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 1;
    }

I am aware that this method is being fired when reloadData() is called. However I was wondering if anybody know when in the lifecycle these methods run automatically for the first time.

This is a curiosity kind of question if anyone happens to have looked into it.

Answer 1

Your tableview Delegate will call automatically multiple times

1. When call of [UITableView didMoveToWindow]

2. Other one from [UITableView layoutSubviews]

3. Change of tableHeaderView view

See this for more info https://stackoverflow.com/a/4986682/4601900

Answer 2

Normally func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int method is being called in ViewDidLoad.

Answer 3

It is automatically called for the first time when the view within which a tableView is contained is loaded by the viewController.