Flutter - Always execute a function when the page appears

Question

How could I make the name() function run whenever the Page1 page appeared?

In the code below before going to Page2 I execute t

Answer 1

Say you want to navigate from page 1 to page 2 and immediately after page 2 loads execute a function in page 2 (useful for showing a dialog immediately when page 2 loads) :

You can do this by adding in initState or didChangeDependencies of page 2 :

 WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
    // Function to execute
  });

If you want to add some logic to put a condition before executing the function, simply push an argument in your page 1 :

Navigator.of(context).pushNamed("/page-2", arguments : true)

Finnaly the code in page 2 becomes:

 _functionToExecute(){
  print("done");
  }
 @override
 void didChangeDependencies() {
 
  WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
    if(ModalRoute.of(context).settings.arguments)
    _functionToExecute()
  });
 }