小编Chr*_*ian的帖子

我想为我的应用程序实现 Provider，经过一些研究，我发现我必须为我的 Data 类实现 ChangeNotifier，以便在“天”更改时更新 UI。

我见过有人在 setter 方法中编写 notificationListeners() 但总是针对单个属性而不是针对列表。什么是正确的实施？

谢谢 ！

这是我的班级和清单：

class Data with ChangeNotifier {\n  List<Day> days = [\n    Day(\n      name: \'Monday\',\n      transactions: [\n        Transaction(\n          isExpense: true,\n          name: \'Pizza\',\n          transactionType: TransactionType.food,\n          amount: \'120\xe2\x82\xac\',\n        ),\n        Transaction(\n          isExpense: true,\n          name: \'EDEKA\',\n          transactionType: TransactionType.payment,\n          amount: \'120\xe2\x82\xac\',\n        ),\n      ],\n    ),\n    Day(\n      name: \'Tuesday\',\n      transactions: [\n        Transaction(\n          isExpense: true,\n          name: \'Sushi\',\n          transactionType: TransactionType.food,\n          amount: \'120\xe2\x82\xac\',\n        ),\n        Transaction(\n          isExpense: true,\n          name: \'Lidl\',\n          transactionType: TransactionType.payment,\n          amount: \'120\xe2\x82\xac\',\n        ),\n        Transaction(\n …