flutter-layout

问题 I want to create a slider like this: But in reality I did not do very well. Can anyone help me? 回答1: You can use carousel_slider package, and this package has a similar solution and very customizable 来源： https://stackoverflow.com/questions/62059357/create-slide-in-flutter-with-multi-carousel-flutter

问题 I'd like to create a a new stateless widget class that is defined by 2 images(top, bottom) and a line(defined by a function, e.g. (x){x+500} , a width(can be 0, if it shouldn't be drawn), and a color) separating the two images. For each pixel: If the y position of a pixel is greater than the result of f(x) + width/2 a pixel of bottom shall be drawn If it's smaller than f(x) - width / 2 a pixel of top shall be drawn Else a pixel of the given line color shall be drawn Blow see an example of

问题 I'd like to create a a new stateless widget class that is defined by 2 images(top, bottom) and a line(defined by a function, e.g. (x){x+500} , a width(can be 0, if it shouldn't be drawn), and a color) separating the two images. For each pixel: If the y position of a pixel is greater than the result of f(x) + width/2 a pixel of bottom shall be drawn If it's smaller than f(x) - width / 2 a pixel of top shall be drawn Else a pixel of the given line color shall be drawn Blow see an example of

问题 Used Library: dart_pdf After searching I found the same issue in GITHUB but unable to resolve the issue. I tried this but blurry image appears. Please help!! ByteData data = await rootBundle.load('assets/test.jpg'); var codec = await instantiateImageCodec(data.buffer.asUint8List()); var frame = await codec.getNextFrame(); var imageBytes = await frame.image.toByteData(); PdfImage assetImage = PdfImage(pdf.document, image: imageBytes.buffer.asUint8List(), width: 86, height: 80); Rendered Image:

问题 Used Library: dart_pdf After searching I found the same issue in GITHUB but unable to resolve the issue. I tried this but blurry image appears. Please help!! ByteData data = await rootBundle.load('assets/test.jpg'); var codec = await instantiateImageCodec(data.buffer.asUint8List()); var frame = await codec.getNextFrame(); var imageBytes = await frame.image.toByteData(); PdfImage assetImage = PdfImage(pdf.document, image: imageBytes.buffer.asUint8List(), width: 86, height: 80); Rendered Image:

问题 I declared two columns in a row to layout the text and the icon. The column for the icon is always center even if I set the mainAxisAlignment with MainAxisAlignment.start . Here is the code for the card: import 'package:flutter/material.dart'; import 'package:intl/intl.dart'; import 'package:life_logger/models.dart'; import 'package:life_logger/screens/entry_editor_screen.dart'; import 'package:life_logger/widgets/dot.dart'; Wrap buildActivities(Entry entry) { var children = <Widget>[]; var

问题 I declared two columns in a row to layout the text and the icon. The column for the icon is always center even if I set the mainAxisAlignment with MainAxisAlignment.start . Here is the code for the card: import 'package:flutter/material.dart'; import 'package:intl/intl.dart'; import 'package:life_logger/models.dart'; import 'package:life_logger/screens/entry_editor_screen.dart'; import 'package:life_logger/widgets/dot.dart'; Wrap buildActivities(Entry entry) { var children = <Widget>[]; var

问题 Code: new Container( alignment: FractionalOffset.center, child: new Row( mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: <Widget>[ new FlatButton( child: new Text('Don\'t have an account?', style: new TextStyle(color: Color(0xFF2E3233))), ), new FlatButton( child: new Text('Register.', style: new TextStyle(color: Color(0xFF84A2AF), fontWeight: FontWeight.bold),), onPressed: moveToRegister, ) ], ), ), And here is the result: https://www.dropbox.com/s/sxklyutyvbbura8/Screenshot

问题 Code: new Container( alignment: FractionalOffset.center, child: new Row( mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: <Widget>[ new FlatButton( child: new Text('Don\'t have an account?', style: new TextStyle(color: Color(0xFF2E3233))), ), new FlatButton( child: new Text('Register.', style: new TextStyle(color: Color(0xFF84A2AF), fontWeight: FontWeight.bold),), onPressed: moveToRegister, ) ], ), ), And here is the result: https://www.dropbox.com/s/sxklyutyvbbura8/Screenshot

问题 In my code below, I am struggling with LifeCyrles in Flutter where I can update my State in Provider, APPARENTLY, only in didChangeDependencies hook or in a template widget (via events hung up on buttons or so). Alright, I don't mind that only didChangeDependencies hook works for me BUT when my logic in earlier mentioned hook depends on some class properties I am having problems with the accuracy of the class data. I get data one step behind (since it's called before build hook I guess). I