Flutter Widget State Constructor Not Running - dart

Question

My code:
import 'package:flutter/material.dart';
import '../services.dart';
import 'PersonCard.dart';
class PersonList extends StatefulWidget {
PersonList() {
Services.fetchPeople();
}
#override
_PersonListState createState() => new _PersonListState();
}
class _PersonListState extends State<PersonList> {
_PersonListState() {
print('Helo!?'); // Not running
}
#override
Widget build(BuildContext context) {
return new Padding(
padding: new EdgeInsets.all(10.0),
child: new ListView(
children: <Widget>[
// new PersonCard('Bob', 'Wazowski', '2 minutes ago'),
// new PersonCard('Tim', 'Alan', '5 hours ago'),
// new PersonCard('Josh', 'Applebee', 'Yesterday'),
]
)
);
}
}
Basically when my widget loads the PersonList() function runs that calls a web service with Services.fetchPeople(). Basically what I want to do is that fetchPeople() will return a Map which I can then iterate over and create PersonCard objects.
But the _PersonListState() constructor doesn't run. Am I missing something obvious?

Answer 1

You can use widget.people.map((p) => new PersonCard(...)) to convert data to wigets:
class PersonList extends StatefulWidget {
PersonList() {
Services.fetchPeople().then((p) => setState(() => people = p));
}
List<Person> people;
#override
_PersonListState createState() => new _PersonListState();
}
class _PersonListState extends State<PersonList> {
_PersonListState() {
print('Helo!?'); // Not running
}
#override
Widget build(BuildContext context) {
return new Padding(
padding: new EdgeInsets.all(10.0),
child: new ListView(
children: widget.people.map(
(p) => new PersonCard(p.firstName, p.lastName, p.updateTime /* or whatever that is */,
).toList(),
),
);
}
}