Question 79552 in Flutter Question posted in
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What's the difference between the two `SetState()` usages? – Flutter

Just wondering if there is any difference between:

      // == Add all picked idoes to the mix table
      setState(() {
        Future.forEach(result, (asset) async {
          final video = await MixTableVideo.create(original: asset);
          videos.add(video);
        });
      });

and:

      // == Add all picked idoes to the mix table

      Future.forEach(result, (asset) async {
          final video = await MixTableVideo.create(original: asset);
          videos.add(video);
        });

      setState(() {});
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2

Answers


  1. Chosen as BEST ANSWER
    0

    Finally I did this which fires a UI update at each video addition:

          // == Add all picked videos to the mix table
      Future.forEach(result, (asset) async {
        final video = await MixTableVideo.create(original: asset);
        setState(() {
          videos.add(video);
        });
      });

  2. 0

    Before we can use state, we need to declare a default set of values for the initial state. This can be done by either creating a state object in the constructor or directly within the class.

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