本文介绍了Flutter构造函数错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我尝试使用的代码段有问题，并且由于我是 dart 的新手，所以我不太理解该错误消息。有人可以向我解释为什么错误消息说
I have a problem with a code snippet I tried to play with, and since I am new to dart I don't really understand the error message. Can somebody explain to me why the error message says
以及如何解决？
推荐答案
类 MaterialList 不存在。看来您是说，已弃用。您应该尝试。
The class MaterialList doesn't exist. It looks like maybe you meant TwoLevelList, which is deprecated. You should try ListView instead.
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