CODEWITHSUNDEEP
flutterasynchronousdartasync-await
tonik
tonik

Reputation: 535

Flutter: Difference if using await

Imagine im calling an async function with return type Future<void> called _uploadData inside the onPressed property of a Button, and the UI does not depend on the function call.

1st

onPressed: () async {
    await _uploadData();
},

or 2nd

onPressed: () {
    _uploadData();
}

Does it make any difference? And if it doesn't, is the 1st one just the better practice?

Upvotes: 0

Views: 396

Answers (1)

Payam Zahedi
Payam Zahedi

Reputation: 855

yes, these codes have different behavior. if you use async/await syntax the code will not continue and will wait until the future completes its work. so If your UI does not depend on Future don't use async/await. otherwise use it. if you want to understand it open the dart-pad counter sample and add below code to it.

  void _incrementCounter() async{
    await Future.delayed(Duration(seconds: 5));
    setState(() {
      _counter++;
    });
  }

convert _incrementCounter() method to above code.

Upvotes: 2

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