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responsive_scaffold #. I/flutter (25517): The specific widget that could not find a Material ancestor was: 重点是:“ No Material widget found… This usually happens when the context provided is from the same StatefulWidget as that whose build function actually creates the Scaffold widget being sought. Flutter provided a widget called Snackbar widget, which is used to show Quick information/messages to users on the current screen. Typically, the Scaffold widget is introduced by the MaterialApp or WidgetsApp widget at the top of your application widget tree. appBar: AppBar( Add a Drawer to a screen. No Scaffold widget found. On mobile it shows a list and pushes to details and on tablet it shows the List and the selected item. Create a Scaffold. Most users ever online was 147 at 15:44 on 03-10-2018. 0 members and 3 guests.. Typically, the ScaffoldMessenger widget is introduced by the MaterialApp at the top of your application widget … In Flutter's I/flutter (11947): material library, that material is represented by the Material widget. The value of bottomSheet can be any widget at all. Typically it's a widget that includes Material. of (). 6.2 解决方案. To add a drawer to the app, wrap it in a Scaffold widget. They help us to know which pages are the most and least popular and see how visitors move around the site. No Scaffold ancestor could be found starting from the context that was passed to Scaffold.of(). There are currently 3 users online. In this post we cover 1) How to fix Scaffold.of() called with a context that does not contain a Scaffoldshow exception 2) Show snackbar with flushbar plugin. Before going to use this first check the default Snackbar. I/flutter (25517): To introduce a Material widget, you can either directly include one, or use a widget that contains I/flutter (25517): Material itself, such as a Card, Dialog, Drawer, or Scaffold. View the online demo here!. Scaffold widgets require a ScaffoldMessenger widget ancestor. 1. Add a drawer. It's unlikely to actually be a BottomSheet, which is used by the implementations of showBottomSheet and showModalBottomSheet. 3. Responsive Scaffold - On mobile it shows a list and pushes to details and on tablet it shows the List and the selected item. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance. 将 RaisedButton 单独用一个 class 封装一 … I/flutter (11947): No Material widget found. This I / flutter (20636): usually happens when the context provided is from the same StatefulWidget as that whose build I / flutter (20636): function actually creates the Scaffold widget … Scaffold.of() called with a context that does not contain a Scaffold. No ScaffoldMessenger widget found. I/flutter (11947): In material design, most widgets are conceptually "printed" on a sheet of material. 4. This usually happens when the context provided is from the same StatefulWidget as that whose build function actually creates the Scaffold widget being sought. All information these cookies collect is aggregated and therefore anonymous. E/flutter (17371): No Scaffold ancestor could be found starting from the context that was passed to Scaffold.of(). Close the drawer programmatically. I/flutter (11947): IconButton widgets require a Material widget ancestor. Populate the drawer with items. Navigation Drawer using Flutter. The Scaffold widget provides a consistent visual structure to apps 2. See also: showBottomSheet, which displays a bottom sheet as a route that can be dismissed with the scaffold's back button. I / flutter (20636): No Scaffold ancestor could be found starting from the context that was passed to Scaffold.

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