navigation

问题 I want to open the drawer when I click the icon in the headerLeft part, I also have try to this.props.navigation.dispatch but is gives an error also navigation.dispatch gives error The code below does not gives errors but is does not open the drawer import { DrawerActions } from '@react-navigation/native'; import { NavigationContainer } from '@react-navigation/native'; import { createDrawerNavigator } from '@react-navigation/drawer'; import { createStackNavigator } from '@react-navigation

问题 I want to open the drawer when I click the icon in the headerLeft part, I also have try to this.props.navigation.dispatch but is gives an error also navigation.dispatch gives error The code below does not gives errors but is does not open the drawer import { DrawerActions } from '@react-navigation/native'; import { NavigationContainer } from '@react-navigation/native'; import { createDrawerNavigator } from '@react-navigation/drawer'; import { createStackNavigator } from '@react-navigation

问题 After learning basics about new architecture components, I decided to apply this knowledge and work a demo project. In this project I have been working with google map. In my navHost fragment, one of the fragment shows google map this way <fragment android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/map" android:name="com.google.android.gms.maps.SupportMapFragment"></fragment> from the code I have been trying to get this fragment class, the related code

问题 After learning basics about new architecture components, I decided to apply this knowledge and work a demo project. In this project I have been working with google map. In my navHost fragment, one of the fragment shows google map this way <fragment android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/map" android:name="com.google.android.gms.maps.SupportMapFragment"></fragment> from the code I have been trying to get this fragment class, the related code

问题 Lets imagine that I have an App var storeVM = BookStoreViewModel(bla1: bla1, bla2: bla2, bla3: bla3) @SceneBuilder var body: some Scene { WindowGroup { BookStoreView( model: storeVM ) } #if os(macOS) Settings { SettingsView(model: config) } #endif } BookStore have a Grid with a lot of books saved in some DB. BookView can be initiated by a following way: BookView(model: bookViewModel) Target: to open BookView IN A NEW SEPARATED WINDOW(as example by click on the button). How can I do this?

问题 Lets imagine that I have an App var storeVM = BookStoreViewModel(bla1: bla1, bla2: bla2, bla3: bla3) @SceneBuilder var body: some Scene { WindowGroup { BookStoreView( model: storeVM ) } #if os(macOS) Settings { SettingsView(model: config) } #endif } BookStore have a Grid with a lot of books saved in some DB. BookView can be initiated by a following way: BookView(model: bookViewModel) Target: to open BookView IN A NEW SEPARATED WINDOW(as example by click on the button). How can I do this?

问题 I have a site I'm attempting to make more accessible. I would like that when a user tabs through links (focus), the menu will drop down and continue to let the user tab through submenu links. When the submenu links are done, it tabs to the next main menu item. This is an abbreviated version of the nav code: <nav id="main-menu-con" class="mmenucon"> <div class="menu-menu-1-container"> <ul id="menu-menu-1" class="main-menu-items"> <li id="menu-item-51" class="menu-item menu-item-type-custom

问题 The API documentation: https://api.flutter.dev/flutter/material/Scaffold-class.html says: The Scaffold was designed to be the single top level container for a MaterialApp and it's typically not necessary to nest scaffolds. For example in a tabbed UI, where the bottomNavigationBar is a TabBar and the body is a TabBarView, you might be tempted to make each tab bar view a scaffold with a differently titled AppBar. It would be better to add a listener to the TabController that updates the AppBar.

问题 The API documentation: https://api.flutter.dev/flutter/material/Scaffold-class.html says: The Scaffold was designed to be the single top level container for a MaterialApp and it's typically not necessary to nest scaffolds. For example in a tabbed UI, where the bottomNavigationBar is a TabBar and the body is a TabBarView, you might be tempted to make each tab bar view a scaffold with a differently titled AppBar. It would be better to add a listener to the TabController that updates the AppBar.

问题 In the example below when I push new MaterialPageRoute it is created on the same level as Home widget in the Flutter widget tree. I would like to have it as a child of widget Home, so Home would be a parent of Child widget. Here is a full code: import 'package:flutter/material.dart'; void main() { runApp(MaterialApp( home: Home(), )); } class Home extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( body: Column( children: <Widget>[ Center( child: Text(