Flutter otalDaily'）？.get（'ENERC_KCAL'）？.get（'quantity'）==null。我不知道有一种自动化的方法可以做到这一点，简洁明了。非常感谢。我不知道有一种自动化的方法可以做到这一点，简洁。谢谢。 if (snapshot.co

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otalDaily'）？.get（'ENERC_KCAL'）？.get（'quantity'）==null。我不知道有一种自动化的方法可以做到这一点，简洁明了。非常感谢。我不知道有一种自动化的方法可以做到这一点，简洁。谢谢。

if (snapshot.connectionState == ConnectionState.done &&
        snapshot.hasData &&
        !snapshot.hasError &&
        snapshot.data != null) {
      energy = snapshot.data['totalDaily']['ENERC_KCAL']['quantity'] == null
          ? 0.0
          : snapshot.data['totalDaily']['ENERC_KCAL']['quantity'];
      fat = snapshot.data['totalDaily']['FAT']['quantity'] == null
          ? 0.0
          : snapshot.data['totalDaily']['FAT']['quantity'];
      protein = snapshot.data['totalDaily']['PROCNT']['quantity'] == null
          ? 0.0
          : snapshot.data['totalDaily']['PROCNT']['quantity'];
      cholesterol = snapshot.data['totalDaily']['CHOLE']['quantity'] == null
          ? 0.0
          : snapshot.data['totalDaily']['CHOLE']['quantity'];

The following NoSuchMethodError was thrown building FutureBuilder<dynamic>(dirty, state: _FutureBuilderState<dynamic>#3bbe5):
    The method '[]' was called on null.
    Receiver: null
    Tried calling: []("quantity")