Flutter 如何在颤振图表中旋转文本？
我正试图在一个Flitter应用程序中设计一个图表，显示按时间或日期绘制的数据（取决于按下按钮），但是，我遇到了一个问题，即图形标签文本相互碰撞 我想知道是否有方法旋转fl_图表对象LineChartData中的文本，以显示角度或垂直旋转的日期或时间 到目前为止，我的代码是这样的，图形的输出是这样的：Flutter 如何在颤振图表中旋转文本？,flutter,charts,fl-chart,Flutter,Charts,Fl Chart,我正试图在一个Flitter应用程序中设计一个图表，显示按时间或日期绘制的数据（取决于按下按钮），但是，我遇到了一个问题，即图形标签文本相互碰撞 我想知道是否有方法旋转fl_图表对象LineChartData中的文本，以显示角度或垂直旋转的日期或时间 到目前为止，我的代码是这样的，图形的输出是这样的： import'package:fl_-chart/fl_-chart.dart'； 进口“包装：颤振/材料.省道”； 导入“package:sembast/timestamp.dart”； 导入
import'package:fl_-chart/fl_-chart.dart'；
进口“包装：颤振/材料.省道”；
导入“package:sembast/timestamp.dart”；
导入“../models/output.dart”；
动态图示器（）{
返回堆栈(
儿童：[
AspectRatio(
方面：1.70，
子：容器(
装饰：康斯特盒子装饰(
borderRadius:borderRadius.all(
半径。圆形（18），
),
颜色：颜色。黑色），
孩子：填充(
填充：仅限常量边设置(
右：18.0，左：12.0，顶部：24，底部：12），
孩子：线条图(
mainData（），
),
),
),
),
],
);
}
LineChartData主数据（）{
返回LineChartData(
...
titlesData:FlTitlesData(
秀：没错，
底部标题：侧标题(
节目名称：对，
储备规模：22，
textStyle:const textStyle(
颜色：Colors.white，fontwweight:fontwweight.bold，fontSize:16），
getTitles:（值）{
//返回值.round（）.toString（）；
对于（int i=0；i您可以使用SideTitles
的属性rotateAngle
完整代码是官方演示linechart示例7
userotateAngle
您可以在下面看到工作演示的红色矩形
代码片段
SideTitles(
rotateAngle: 90,
showTitles: true,
工作演示
完整代码
import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';
class LineChartSample7 extends StatelessWidget {
@override
Widget build(BuildContext context) {
return SizedBox(
width: 300,
height: 140,
child: LineChart(
LineChartData(
lineTouchData: LineTouchData(enabled: false),
lineBarsData: [
LineChartBarData(
spots: [
FlSpot(0, 4),
FlSpot(1, 3.5),
FlSpot(2, 4.5),
FlSpot(3, 1),
FlSpot(4, 4),
FlSpot(5, 6),
FlSpot(6, 6.5),
FlSpot(7, 6),
FlSpot(8, 4),
FlSpot(9, 6),
FlSpot(10, 6),
FlSpot(11, 7),
],
isCurved: true,
barWidth: 2,
colors: [
Colors.green,
],
dotData: FlDotData(
show: false,
),
),
LineChartBarData(
spots: [
FlSpot(0, 0),
FlSpot(1, 3),
FlSpot(2, 4),
FlSpot(3, 5),
FlSpot(4, 8),
FlSpot(5, 3),
FlSpot(6, 5),
FlSpot(7, 8),
FlSpot(8, 4),
FlSpot(9, 7),
FlSpot(10, 7),
FlSpot(11, 8),
],
isCurved: true,
barWidth: 2,
colors: [
Colors.black,
],
dotData: FlDotData(
show: false,
),
),
LineChartBarData(
spots: [
FlSpot(0, 7),
FlSpot(1, 3),
FlSpot(2, 4),
FlSpot(3, 0),
FlSpot(4, 3),
FlSpot(5, 4),
FlSpot(6, 5),
FlSpot(7, 3),
FlSpot(8, 2),
FlSpot(9, 4),
FlSpot(10, 1),
FlSpot(11, 3),
],
isCurved: false,
barWidth: 2,
colors: [
Colors.red,
],
dotData: FlDotData(
show: false,
),
),
],
betweenBarsData: [
BetweenBarsData(
fromIndex: 0,
toIndex: 2,
colors: [Colors.red.withOpacity(0.3)],
)
],
minY: 0,
titlesData: FlTitlesData(
bottomTitles: SideTitles(
rotateAngle: 90,
showTitles: true,
textStyle:
TextStyle(fontSize: 10, color: Colors.purple, fontWeight: FontWeight.bold),
getTitles: (value) {
switch (value.toInt()) {
case 0:
return 'Jan';
case 1:
return 'Feb';
case 2:
return 'Mar';
case 3:
return 'Apr';
case 4:
return 'May';
case 5:
return 'Jun';
case 6:
return 'Jul';
case 7:
return 'Aug';
case 8:
return 'Sep';
case 9:
return 'Oct';
case 10:
return 'Nov';
case 11:
return 'Dec';
default:
return '';
}
}),
leftTitles: SideTitles(
showTitles: true,
getTitles: (value) {
return '\$ ${value + 0.5}';
},
),
),
gridData: FlGridData(
show: true,
checkToShowHorizontalLine: (double value) {
return value == 1 || value == 6 || value == 4 || value == 5;
},
),
),
),
);
}
}
您可以使用侧标题
的属性旋转角度
完整代码是官方演示linechart示例7
userotateAngle
您可以在下面看到工作演示的红色矩形
代码片段
SideTitles(
rotateAngle: 90,
showTitles: true,
工作演示
完整代码
import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';
class LineChartSample7 extends StatelessWidget {
@override
Widget build(BuildContext context) {
return SizedBox(
width: 300,
height: 140,
child: LineChart(
LineChartData(
lineTouchData: LineTouchData(enabled: false),
lineBarsData: [
LineChartBarData(
spots: [
FlSpot(0, 4),
FlSpot(1, 3.5),
FlSpot(2, 4.5),
FlSpot(3, 1),
FlSpot(4, 4),
FlSpot(5, 6),
FlSpot(6, 6.5),
FlSpot(7, 6),
FlSpot(8, 4),
FlSpot(9, 6),
FlSpot(10, 6),
FlSpot(11, 7),
],
isCurved: true,
barWidth: 2,
colors: [
Colors.green,
],
dotData: FlDotData(
show: false,
),
),
LineChartBarData(
spots: [
FlSpot(0, 0),
FlSpot(1, 3),
FlSpot(2, 4),
FlSpot(3, 5),
FlSpot(4, 8),
FlSpot(5, 3),
FlSpot(6, 5),
FlSpot(7, 8),
FlSpot(8, 4),
FlSpot(9, 7),
FlSpot(10, 7),
FlSpot(11, 8),
],
isCurved: true,
barWidth: 2,
colors: [
Colors.black,
],
dotData: FlDotData(
show: false,
),
),
LineChartBarData(
spots: [
FlSpot(0, 7),
FlSpot(1, 3),
FlSpot(2, 4),
FlSpot(3, 0),
FlSpot(4, 3),
FlSpot(5, 4),
FlSpot(6, 5),
FlSpot(7, 3),
FlSpot(8, 2),
FlSpot(9, 4),
FlSpot(10, 1),
FlSpot(11, 3),
],
isCurved: false,
barWidth: 2,
colors: [
Colors.red,
],
dotData: FlDotData(
show: false,
),
),
],
betweenBarsData: [
BetweenBarsData(
fromIndex: 0,
toIndex: 2,
colors: [Colors.red.withOpacity(0.3)],
)
],
minY: 0,
titlesData: FlTitlesData(
bottomTitles: SideTitles(
rotateAngle: 90,
showTitles: true,
textStyle:
TextStyle(fontSize: 10, color: Colors.purple, fontWeight: FontWeight.bold),
getTitles: (value) {
switch (value.toInt()) {
case 0:
return 'Jan';
case 1:
return 'Feb';
case 2:
return 'Mar';
case 3:
return 'Apr';
case 4:
return 'May';
case 5:
return 'Jun';
case 6:
return 'Jul';
case 7:
return 'Aug';
case 8:
return 'Sep';
case 9:
return 'Oct';
case 10:
return 'Nov';
case 11:
return 'Dec';
default:
return '';
}
}),
leftTitles: SideTitles(
showTitles: true,
getTitles: (value) {
return '\$ ${value + 0.5}';
},
),
),
gridData: FlGridData(
show: true,
checkToShowHorizontalLine: (double value) {
return value == 1 || value == 6 || value == 4 || value == 5;
},
),
),
),
);
}
}