How to pass functions to widgets in Flutter

Question

Hi Guys,

I am new in Flutter Framework. Can anyone tell me how to pass functions to widgets in Flutter? 

Answer 1

Hi@akhtar,

Functions are first-class objects in Dart and can be passed as parameters to other functions. We pass a function to a widget essentially saying, invoke this function when something happens. Callbacks using interfaces like Android have too much boilerplate code for a simple callback. Dart does both declarations as well as setting up the callback. This becomes much cleaner and organized and helps us avoid unnecessary complications.

FlatButton(  
  onPressed: () {  
    // Do something here  
  }  
)