flutter-packages

来源： https://stackoverflow.com/questions/58724412/flutter-widget-carousel-instead-of-just-image-carousel

来源： https://stackoverflow.com/questions/58724412/flutter-widget-carousel-instead-of-just-image-carousel

问题 I have a website build with node js and MongoDB and I want to create a mobile app with flutter and I don't know how to connect flutter with MongoDB. give me some code example. 回答1: Import flutter library mongo_dart and connect to the database. mongo_dart Server-side driver library for MongoDB implemented in pure Dart. I hope the below code snippet helps !! import 'package:mongo_dart/mongo_dart.dart' show Db, DbCollection; class DBConnection { static DBConnection _instance; final String _host

问题 I have a website build with node js and MongoDB and I want to create a mobile app with flutter and I don't know how to connect flutter with MongoDB. give me some code example. 回答1: Import flutter library mongo_dart and connect to the database. mongo_dart Server-side driver library for MongoDB implemented in pure Dart. I hope the below code snippet helps !! import 'package:mongo_dart/mongo_dart.dart' show Db, DbCollection; class DBConnection { static DBConnection _instance; final String _host

问题 I've been trying to get dependencies for my Flutter project on Windows but it's taking a long time and after a while , it shows this error in 'messages' bar. Running "flutter pub get" in badhan_blood_bank... OS Error: The semaphore timeout period has expired. , errno = 121, address = storage.googleapis.com, port = 53515 pub get failed (server unavailable) -- attempting retry 1 in 1 second... I am trying to solve this problem some ways but failed to solve. I am doing flutter clean, flutter

问题 TLDR: How to force a specific Flutter package (library) version for the entire app? Let's suppose I have the following dependencies in my pubspec.yaml file: dependencies: flutter: sdk: flutter datetime_picker_formfield: 0.4.3 date_utils: 0.1.0+3 intl: 0.15.8 which gives me a version conflict error: Because flutter_app depends on date_utils 0.1.0+3 which depends on intl ^0.16.0, intl ^0.16.0 is required. but when we change intl to intl: 0.15.8 we get: Because flutter_app depends on datetime

问题 TLDR: How to force a specific Flutter package (library) version for the entire app? Let's suppose I have the following dependencies in my pubspec.yaml file: dependencies: flutter: sdk: flutter datetime_picker_formfield: 0.4.3 date_utils: 0.1.0+3 intl: 0.15.8 which gives me a version conflict error: Because flutter_app depends on date_utils 0.1.0+3 which depends on intl ^0.16.0, intl ^0.16.0 is required. but when we change intl to intl: 0.15.8 we get: Because flutter_app depends on datetime

问题 I want use provider ( ChangeNotifierProvider ) and ChangeNotifier for manage app state. But how I can access state from one model in another model? Use case: In chat app, one model for store user information. Other model use user information (for example user id) to make call to database (Firestore) and get stream of chat data. For example: class Model1 extends ChangeNotifier { final List<Item> items = []; class Model2 extends ChangeNotifier { //Access items from Model1 here items; Is this