why does this problem occur in Flutter?

The named parameter 'validator' isn't defined.

I did form and form key but it is still wrong.

I erased the rest for not being long.

This problem

   TextField(
                  
                   validator : (value){
                    if(value.isempty){
                      return 'Email must not be empty';
                    }
                    return null;
                  }
                ),

CodePudding user response：

Try to use TextFormField instead of TextField because TextField doesn't use and functionality of Form and validator is functionality of Form.

Refer this 3 errors in make components in flutter for more details.