In this article we will learn about some of the frequently asked TypeScript programming questions in technical like “flutter ui upload multiple image” Code Answer’s. When creating scripts and web applications, error handling is an important part. If your code lacks error checking code, your program may look very unprofessional and you may be open to security risks. Error or stack handling on typescript was simple and easy. An error message with filename, line number and a message describing the error is sent to the browser. This tutorial contains some of the most common error checking methods in Typescript. Below are some solution about “flutter ui upload multiple image” Code Answer’s.
flutter ui upload multiple image
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import 'package:flutter/material.dart';
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import 'dart:async';
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import 'package:multi_image_picker/multi_image_picker.dart';
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void main() => runApp(new MyApp());
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class MyApp extends StatefulWidget {
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@override
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_MyAppState createState() => new _MyAppState();
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}
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class _MyAppState extends State<MyApp> {
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List<Asset> images = List<Asset>();
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String _error = 'Selectionner une image';
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@override
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void initState() {
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super.initState();
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}
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Widget buildGridView() {
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return GridView.count(
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crossAxisCount: 3,
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children: List.generate(images.length, (index) {
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Asset asset = images[index];
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return AssetThumb(
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asset: asset,
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width: 300,
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height: 300,
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);
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}),
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);
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}
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Future<void> loadAssets() async {
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List<Asset> resultList = List<Asset>();
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String error = 'No Error Dectected';
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try {
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resultList = await MultiImagePicker.pickImages(
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maxImages: 4,
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enableCamera: true,
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selectedAssets: images,
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cupertinoOptions: CupertinoOptions(takePhotoIcon: "chat"),
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materialOptions: MaterialOptions(
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actionBarColor: "#abcdef",
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actionBarTitle: "Example App",
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allViewTitle: "All Photos",
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useDetailsView: false,
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selectCircleStrokeColor: "#000000",
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),
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);
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} on Exception catch (e) {
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error = e.toString();
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}
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// If the widget was removed from the tree while the asynchronous platform
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// message was in flight, we want to discard the reply rather than calling
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// setState to update our non-existent appearance.
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if (!mounted) return;
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setState(() {
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images = resultList;
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_error = error;
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});
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}
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@override
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Widget build(BuildContext context) {
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return new MaterialApp(
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home: new Scaffold(
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appBar: new AppBar(
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xxxxxxxxxx1import 'dart:io';23//import 'package:blog_app/models/ImageUploadModel.dart';4import 'package:flutter/material.dart';5import 'package:image_picker/image_picker.dart';67class SingleImageUpload extends StatefulWidget {8@override9_SingleImageUploadState createState() {10return _SingleImageUploadState();11}12}1314class _SingleImageUploadState extends State<SingleImageUpload> {15List<Object> images = List<Object>();16Future<File> _imageFile;17@override18void initState() {19// TODO: implement initState20super.initState();21setState(() {22images.add("Add Image");23images.add("Add Image");24// images.add("Add Image");25// images.add("Add Image");26});27}2829@override30Widget build(BuildContext context) {31return new MaterialApp(32home: new Scaffold(33appBar: new AppBar(34centerTitle: true,35title: const Text('Upload image'),36),37body: Column(38children: <Widget>[39Expanded(40child: buildGridView(),41),42],43),44),45);46}4748Widget buildGridView() {49return GridView.count(50shrinkWrap: true,51crossAxisCount: 3,52childAspectRatio: 1,53children: List.generate(images.length, (index) {54if (images[index] is ImageUploadModel) {55ImageUploadModel uploadModel = images[index];56return Card(57clipBehavior: Clip.antiAlias,58child: Stack(59children: <Widget>[60Image.file(61uploadModel.imageFile,62width: 300,63height: 300,64),65Positioned(66right: 5,67top: 5,68child: InkWell(69child: Icon(70Icons.remove_circle,71size: 20,72color: Colors.red,73),74onTap: () {75setStateflutter ui upload multiple imagexxxxxxxxxx1import 'package:flutter/material.dart';2import 'dart:async';34import 'package:multi_image_picker/multi_image_picker.dart';56void main() => runApp(new MyApp());78class MyApp extends StatefulWidget {9@override10_MyAppState createState() => new _MyAppState();11}1213class _MyAppState extends State<MyApp> {14List<Asset> images = List<Asset>();15String _error;1617@override18void initState() {19super.initState();20}2122Widget buildGridView() {23if (images != null)24return GridView.count(25crossAxisCount: 3,26children: List.generate(images.length, (index) {27Asset asset = images[index];28return AssetThumb(29asset: asset,30width: 300,31height: 300,32);33}),34);35else36return Container(color: Colors.white);37}3839Future<void> loadAssets() async {40setState(() {41images = List<Asset>();42});4344List<Asset> resultList;45String error;4647try {48resultList = await MultiImagePicker.pickImages(49maxImages: 300,50);51} on Exception catch (e) {52error = e.toString();53}5455// If the widget was removed from the tree while the asynchronous platform56// message was in flight, we want to discard the reply rather than calling57// setState to update our non-existent appearance.58if (!mounted) return;5960setState(() {61images = resultList;62if (error == null) _error = 'No Error Dectected';63});64}6566@override67Widget build(BuildContext context) {68return new MaterialApp(69home: new Scaffold(70appBar: new AppBar(71title: const Text('Plugin example app'),72),73body: Column(74children: <Widget
