Flutter

问题 I am trying to create a BLOC which depends on two other time based bloc and a non-time based bloc. What i mean with time based is, for example they are connecting a remote server so it takes time. It's working just like this: Login (It's of course taking some time) If login is successful Do another process (This is something takes time also. It returns a future.) After login and another process finishes, let the page know it. My BLOC depends on these three: final UserBloc _userBloc; final

问题 I am trying to create a BLOC which depends on two other time based bloc and a non-time based bloc. What i mean with time based is, for example they are connecting a remote server so it takes time. It's working just like this: Login (It's of course taking some time) If login is successful Do another process (This is something takes time also. It returns a future.) After login and another process finishes, let the page know it. My BLOC depends on these three: final UserBloc _userBloc; final

问题 I am trying to create a BLOC which depends on two other time based bloc and a non-time based bloc. What i mean with time based is, for example they are connecting a remote server so it takes time. It's working just like this: Login (It's of course taking some time) If login is successful Do another process (This is something takes time also. It returns a future.) After login and another process finishes, let the page know it. My BLOC depends on these three: final UserBloc _userBloc; final

问题 I'm trying to catch symbols in a dart Regexp. My regexp looks like this: RegExp containsSymbolRegExp = RegExp(r"[-!$%^&*()_+|~=`{}\[\]:;'<>?,.\/]"); However, I also need to make it catch the symbol " I can't stick " in there though, since it messes with the string. Any ideas how to do this? Thanks. edit: jamesdlin's answer works great for dart. But it doesn't work for my flutter app, so I'm thinking it has something to do with flutter. Here's the code I'm applying this to:

问题 I'm trying to align horizontal bottom 1 Text and 1 TextField value using Row , but TextField value always higher than the left Text . is it possible to align horizontal bottom Text and TextField value even when the font-size more bigger ? Here are my code and screenshot: body: Column( children: <Widget>[ Row( children: <Widget>[ Text('Number 1 : '), Expanded( child: TextField( textAlign: TextAlign.start, textAlignVertical: TextAlignVertical.bottom, textCapitalization: TextCapitalization

问题 My goal is to build a registration in flutter with Firebase. However, when I press the button that contains the register function, the app stops and I receive this error: Exception has occurred. _AssertionError ('package:firebase_auth/src/firebase_auth.dart': Failed assertion: line 95 pos 12: 'email != null': is not true.) The integration with firebase is working, probably the problem is on textformfield that is not getting data... import 'package:cloud_firestore/cloud_firestore.dart'; import

问题 I am trying to push local notification through my app by using flutter_local_notifications package and as on FlutterNotificationsPlugin the ".schedule" is deprecated I tried using ".zonedSchedule" but it requires TZDateTime value. var androidDetails = AndroidNotificationDetails(t.id, "Task Notifier", "Notifies if you have a task scheduled at a particular time"); var generalNotificationDetails = NotificationDetails(android: androidDetails); var now = DateTime.now(); var scheduledTime =

问题 I tried a column with an aligned icon but it didn't display correctly If anyone has any idea to help. It would be greatly appreciated. Thank you This is my code that i tried List<Widget> temp = []; listAirline.map((airline) { listAirlineName.map((item) { if (airline.name == item) { temp.add( Column( children: <Widget>[ Container( height: 20, decoration: BoxDecoration( color: Colors.white, borderRadius: BorderRadius.all(Radius.elliptical(100.0, 60.0)), ), child: Image.asset( "images/Airlines/"

问题 I can not use these both flutter plugins together: cloud_firestore: ^0.9.0+2 barcode_scan: ^0.0.8 When run, error occured: D8: Program type already present: android.arch.core.util.Function ********************************************************* WARNING: This version of cloud_firestore will break your Android build if it or its dependencies aren't compatible with AndroidX. See https: //goo.gl /CP92wY for more information on the problem and how to fix it. This warning prints for all Android

问题 I'm trying to play my own custom sound for my notifications. But on my android emulator, it just plays the default sound and on my own device, it doesn't even make a sound. I tried this but it didn't help me. FlutterLocalNotificationsPlugin _notifications = FlutterLocalNotificationsPlugin(); var initializationSettingsAndroid = AndroidInitializationSettings('app_icon'); var initializationSettingsIOS = IOSInitializationSettings(); var initializationSettings = InitializationSettings