在tableview.reloadData之后调用一次函数

Question

Every time I reload my table by calling

tableview.reloadData()

I want to call a specification function like

myFunction()

I was wondering, instead of stacking these two function next one after another everywhere in my code like

tableview.reloadData()
myFunction()

Is there a smart and clean way of calling myFunction every time tableview reloads?

Answer 1

There is no delegate method to give you a callback when reloadData() has completed, but to make it cleaner you could do a couple of different things.

You could create your own function like this:

func reloadTable() {
   tableView.reloadData()
   myFunction()
   //plus anything else you want to accomplish
}

Then you call that function everywhere in one line instead of repeating your code.

Alternatively, you could subclass UITableView and override the reloadData() method, adding your additional functionality.

Answer 2

one way is to use inheritance. just implement your own tableview class and reload the reloadData function of UITableView.

class YourTableView: UITableView {
     override func reloadData() {
         super.reloadData()
         myFunction()
     }
     func myFunction() {
         //do something
     }
}

then declare YourTableView instead of UITableView