Cannot make onTap function due to The argument type 'Function' can't be assigned to the parameter type 'void Function() So frustrating i was following a video and he successfully created the function but i am seeing this error

CodePudding user response：

Try below code hope its helpful to you. set onTap function like below. refer InkWell class here

InkWell(
      onTap: () {
        //write your onTap void function here
        print('Pressed');
      },
      child:Container(),//or your widget here
    ),

CodePudding user response：

The tip is the question mark. You have

void Function()?

onTap needs a not-nullable value:

void Function()

You need to wrap the function variable:

onTap : onTap!

or to prevent a crash you can just give an empty function to call when onTap is null:

onTap : onTap ?? (){}