list - 如何将地图数据转换为颤动中的对象列表？

Question

如何将地图转换为颤动中的对象列表。

样本数据，

 Model (
  key1: value1,
  key2: value2, 
  key3:value 3,
 )

预期结果，

  [0]: Model {key1:value1},
  [1]: Model {key2:value2},
  [2]: Model {key3:value3}

标签： listflutterdart

Answer 1

class SomeDataClass {
  final String option1;
  final String option2;
  final String option3;
  final String option4;
  final String option5;

  const SomeDataClass({
    @required this.option1,
    @required this.option2,
    @required this.option3,
    @required this.option4,
    @required this.option5,
  });

  factory SomeDataClass.fromMap(Map<String, dynamic> map) {
    return SomeDataClass(
      option1: map['option1'] as String,
      option2: map['option2'] as String,
      option3: map['option3'] as String,
      option4: map['option4'] as String,
      option5: map['option5'] as String,
    );
  }

  Map<String, dynamic> toMap() {
    return {
      'option1': this.option1,
      'option2': this.option2,
      'option3': this.option3,
      'option4': this.option4,
      'option5': this.option5,
    };
  }
}

void main(){
  final optionsList = [
    {
      'option1': 'you can use fromMap and toMap methods',
      'option2': 'you can use some serialization libraries such as metinoned in opton 3',
      'option3': 'json_serializable',
      'option4': 'I am going to show you the from and to map method',
      'option5': 'good luck',
    }
    // there could be other options in the list.
  ];
  final someMappedObjectList = <SomeDataClass>[];
  for(var map in optionsList){
    final someObject = SomeDataClass.fromMap(map);
    someMappedObjectList.add(someObject);
  }
  
  // now you can use the someMappedObjectList.
}