run initState of main screen from other screen-CodePudding

I have 3 screens main, page 1, and page 2. I navigate from page1 to page 2. and then pop from page2 to page 1, but during this, I want to run the function of the main screen when popping from page2 to page1.. is this possible

CodePudding user response：

To run a function on the main screen when popping from page2 to page1 in Flutter, you can use the Navigator.pop method and pass a callback function as an argument. The Navigator.pop method is used to pop the current route (page2 in this case) off the navigation stack and return to the previous route (page1 in this case). You can pass a callback function as an argument to the Navigator.pop method, and this function will be executed after the pop operation is completed.

Here is an example of how this could be implemented in Flutter:

// Define the callback function on the main screen
void mainScreenCallback() {
  // Perform some action on the main screen
}

// Navigate from page1 to page2
Navigator.push(context, MaterialPageRoute(builder: (context) => page2));

// Pop from page2 to page1 and execute the main screen callback
Navigator.pop(context, mainScreenCallback);

In this example, the mainScreenCallback function is defined on the main screen and is passed as an argument to the Navigator.pop method. When the Navigator.pop method is executed, the pop operation will occur and the mainScreenCallback function will be executed after the pop operation is completed.

This approach allows you to run a function on the main screen when popping from page2 to page1 in Flutter, and can be useful for performing some kind of action on the main screen in response to the pop operation.