在viewDidLoad之前调用UITableView委托方法

Question

I have a view controller that subclasses UITableViewController. When I push this VC onto the navigation stack, the UITableView delegate methods get called, then viewDidLoad gets called, then the delegate methods get called again. What is going on here?

Answer 1

Because your view is a subclass of UITableViewController, the delegate and datasource are attached from the very first moment it's created, and the methods are called as soon as the datasource is asigned.

Also, you can set a breakpoint on it and see which class called the datasource.