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Dart 如何使用fromJson在地图中列出？

dart flutter

Dart 如何使用fromJson在地图中列出？,dart,flutter,Dart,Flutter,通常，我会使用这段代码来创建列表 jsonMap.map((gallery) => new Gallery.fromJson(gallery)).toList(); 但是我不知道如何使用fromJson 我通过使用解决了这个问题 List.castFrom(json['galleries']).map((gallery) => new Gallery.fromJson(gallery)).toList();

通常，我会使用这段代码来创建列表

jsonMap.map((gallery) => new Gallery.fromJson(gallery)).toList();
但是我不知道如何使用fromJson

我通过使用解决了这个问题

List.castFrom(json['galleries']).map((gallery) => new Gallery.fromJson(gallery)).toList();