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请问如何实现下拉刷新序列帧？
这里在页面第一次启动时，loading 状态下，序列帧图片紊乱，第二次就好了
如果页面中有好几个model，请问如何使用ProviderWidget 这个类？
多个页面使用ProviderWidget ，数据为空
我在用ProviderWidget 这个类的时候，model属性按你代码里面那样传了一个UserModel() 实例，我有2个页面用到了这个ProviderWidget，在第一级页面获取值并且赋值给UserModel的userBean，然后调用notifyListeners 方法，第一级页面都没有问题，但是到了第二级页面就发现Model中的 userBean的数据都为空了，我感觉是在第二个页面ProviderWidget 给model属性赋值，再次调用了UserModel 构造方法，把导致userBean 再次被初始化，然后数据就为空了，请问这个问题怎么解决啊
少引用了个库吧
运行报错
http: ^0.12.2
大哥，文件丢了
async_demo/setstate/Test1Page.dart
async_demo/widget/error.dart
async_demo/widget/loading.dart
async_demo/widget/loading_dialog.dart
async_demo/widget/film.dart
这些文件去哪了？
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