I want to do something after a lot of future function done,bu I do not know how to write the code in dart? the code like this:
for (var d in data) {
d.loadData().then()
}
// when all loaded
// do something here
but I don't want to wait them one by one:
for (var d in data) {
await d.loadData(); // NOT NEED THIS
}
how to write those code in dart?
Answer
You can use Future.wait to wait for a list of futures:
import 'dart:async';
Future main() async {
var data = [];
var futures = <Future>[];
for (var d in data) {
futures.add(d.loadData());
}
await Future.wait(futures);
}