dart

问题 I have a user management feature in my flutter app that uses firebase authentication. I can register new user accounts using firebase_auth 's createUserWithEmailAndPassword() function. return await FirebaseAuth.instance. createUserWithEmailAndPassword(email: email, password: password); The problem is when the registration is successful it automatically authenticates my FirebaseAuth instance as the new user even though I am already logged in. I came across this answer: Firebase kicks out

问题 I have a user management feature in my flutter app that uses firebase authentication. I can register new user accounts using firebase_auth 's createUserWithEmailAndPassword() function. return await FirebaseAuth.instance. createUserWithEmailAndPassword(email: email, password: password); The problem is when the registration is successful it automatically authenticates my FirebaseAuth instance as the new user even though I am already logged in. I came across this answer: Firebase kicks out

问题 I've been having issues with node-sass doing all manner of silliness during "npm install" including but not limited to : GNU c++ compiling something (likely itself) trying to run python2.7 trying to run any other version of python trying to connect to github and this was posing problems in a corporate context where I have to compile my project on Jenkins where NPM libraries must be pulled from a clone of npm registry on corporate servers and only the strict necessities of that specific

问题 I've been having issues with node-sass doing all manner of silliness during "npm install" including but not limited to : GNU c++ compiling something (likely itself) trying to run python2.7 trying to run any other version of python trying to connect to github and this was posing problems in a corporate context where I have to compile my project on Jenkins where NPM libraries must be pulled from a clone of npm registry on corporate servers and only the strict necessities of that specific

问题 I've been having issues with node-sass doing all manner of silliness during "npm install" including but not limited to : GNU c++ compiling something (likely itself) trying to run python2.7 trying to run any other version of python trying to connect to github and this was posing problems in a corporate context where I have to compile my project on Jenkins where NPM libraries must be pulled from a clone of npm registry on corporate servers and only the strict necessities of that specific

问题 Here's what I want to build but I am able to achieve this by the following code, @override Widget build(BuildContext context) { return Scaffold( body: NestedScrollView( headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled){ return [ SliverAppBar( expandedHeight: 120, floating: false, pinned: false, flexibleSpace: Container( padding: EdgeInsets.all(10), height: 160, width: double.infinity, child: Column( mainAxisAlignment: MainAxisAlignment.end, crossAxisAlignment:

问题 I am new to Flutter. I try to load network image using image.network widget. it's work fine but sometimes it's take time to load.I added tap listener to image.network during tap i need to check image is fully load or not based on the result I need to redirect page. how to check image is loaded or not ? Code: new Image.network('http://via.placeholder.com/350x150') Any help will be appreciated, thank you in advance 回答1: You may use the loadingBuilder which is inbuilt feature from flutter for

问题 I am new to Flutter. I try to load network image using image.network widget. it's work fine but sometimes it's take time to load.I added tap listener to image.network during tap i need to check image is fully load or not based on the result I need to redirect page. how to check image is loaded or not ? Code: new Image.network('http://via.placeholder.com/350x150') Any help will be appreciated, thank you in advance 回答1: You may use the loadingBuilder which is inbuilt feature from flutter for

问题 I want to show an AlertDialog when a http get fails. The function showDialog (https://api.flutter.dev/flutter/material/showDialog.html) has the parameter "@required BuildContext context", but I want to call the AlertDialog from my async function getNews(), which hasn't a context value. By analogy with Java, where I use null for dialog without an owner, I tried to put context value to null, but it is not accepted. This is my code: Future<dynamic> getNews() async { dynamic retVal; try { var

问题 I want to show an AlertDialog when a http get fails. The function showDialog (https://api.flutter.dev/flutter/material/showDialog.html) has the parameter "@required BuildContext context", but I want to call the AlertDialog from my async function getNews(), which hasn't a context value. By analogy with Java, where I use null for dialog without an owner, I tried to put context value to null, but it is not accepted. This is my code: Future<dynamic> getNews() async { dynamic retVal; try { var