我想创建一个折线图，其中包含 CoinData 列表和 SfCartesian Chart 在颤动中，我希望图表自动使 y 轴的起点成为提供的最低数字，最高数字成为提供的最高数字。我查看了文档https://help.syncfusion.com/flutter/cartesian-charts/axis-customization ，我能找到的最接近的东西是属性anchorRangeToVisiblePoints: false或手动设置属性visibleMinimum，visibleMaximum但这不是我的选择将根据不同的硬币传递不同的 CoinData 价格，我不能对所有这些都使用相同的值，不知道如何实现这个对于更多上下文，这是我用来测试和实验的代码。
import 'package:flutter/material.dart';
import 'package:syncfusion_flutter_charts/charts.dart';
class Charts extends StatefulWidget {
const Charts({Key? key}) : super(key: key);
@override
_ChartsState createState() => _ChartsState();
}
class _ChartsState extends State<Charts> {
@override
void initState() {
// TODO: implement initState
// _CoinData = getChartData();
super.initState();
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Container(
height: 267,
child: SfCartesianChart(
primaryYAxis: NumericAxis(isVisible: false,anchorRangeToVisiblePoints: false,),
tooltipBehavior: TooltipBehavior(enable: false),
primaryXAxis: DateTimeAxis(isVisible: false,),
series: <ChartSeries>[
// Renders line chart
LineSeries<CoinData, DateTime>(
dataSource: prices,
xValueMapper: (CoinData sales, _) => sales.year,
yValueMapper: (CoinData sales, _) => sales.sales)
]))));
}
}
class CoinData {
CoinData(int year, this.sales) {
this.year = DateTime.fromMillisecondsSinceEpoch(year).toLocal();
}
late DateTime year;
double sales;
}
List<CoinData> prices = [
CoinData(1642392036421, 42749.711818578595),
CoinData(1642388517068, 42989.70122789917),
CoinData(1642395633127, 42712.08236994989),
CoinData(1642402838825, 42843.846816992016),
CoinData(1642399332413, 42599.83212961661),
CoinData(1642406434920, 42718.431064867356),
CoinData(1642410277789, 42918.18830305879),
CoinData(1642413740231, 42953.704362756995),
CoinData(1642417237341, 42848.42337504775),
CoinData(1642420853261, 42787.2565709712),
CoinData(1642424533130, 42666.07903883221),
CoinData(1642428022319, 42682.25091040553),
CoinData(1642431666253, 42706.84109519157),
CoinData(1642435475100, 42554.380859461504),
CoinData(1642438853722, 42288.63596857892),
CoinData(1642442594070, 42117.89357566385),
CoinData(1642446293756, 42292.17977430048),
CoinData(1642449728774, 42331.65604621167),
CoinData(1642453270106, 42213.655228582276),
CoinData(1642456918900, 41756.89208374346),
CoinData(1642460477923, 42346.541012394795),
CoinData(1642464161403, 42311.13096812778),
CoinData(1642468369285, 42420.84387886949),
CoinData(1642471295036, 42305.94587540152),
CoinData(1642474865285, 42310.62962338389),
CoinData(1642478466863, 42073.464694362105),
CoinData(1642482191362, 42104.48450429597),
CoinData(1642485765736, 42243.993380507665),
CoinData(1642489204082, 42415.20222337461),
CoinData(1642492943052, 42085.76408393512),
CoinData(1642496567754, 41774.58393396233),
CoinData(1642500099392, 42055.251604425226),
CoinData(1642503653184, 42058.93212053518),
CoinData(1642507342334, 41843.44735603253),
CoinData(1642510959133, 41889.82064061213),
CoinData(1642514481569, 41727.002021779736),
CoinData(1642518077038, 41356.61112815827),
CoinData(1642521723376, 41702.56259168864),
CoinData(1642525337159, 41796.53046970178),
CoinData(1642528983594, 41550.28411391625),
CoinData(1642532466377, 41716.19509209493),
CoinData(1642536297311, 41812.879241771945),
CoinData(1642539721904, 41741.91803252099),
CoinData(1642543231985, 42498.18123135277),
CoinData(1642546837453, 42498.47853946216),
CoinData(1642550473450, 42395.45879157343),
CoinData(1642554229144, 42332.290976869364),
CoinData(1642557774831, 42454.98929665433),
CoinData(1642561329780, 42334.4404296046),
CoinData(1642564980424, 41779.01270893919),
CoinData(1642568497700, 41820.97346316072),
CoinData(1642572157122, 41778.45401628946),
CoinData(1642575888262, 41781.40839917395),
CoinData(1642579246250, 41265.005495175465),
CoinData(1642582988822, 41325.06579035713),
CoinData(1642586541303, 41658.36261134919),
CoinData(1642590063989, 41455.42789267524),
CoinData(1642593802287, 42111.015879629755),
CoinData(1642597245462, 42194.35952948134),
CoinData(1642600921347, 42201.65536625609),
CoinData(1642604564168, 42652.55815588597),
CoinData(1642608225687, 42014.03261432062),
CoinData(1642611838743, 41969.260501867146),
CoinData(1642615253442, 42134.455770558474),
CoinData(1642619019192, 42025.43482944683),
CoinData(1642622544973, 41968.95038082978),
CoinData(1642626078457, 41618.25322218039),
CoinData(1642629658614, 41817.745577805385),
CoinData(1642633358721, 42035.87953978328),
CoinData(1642636805471, 41749.55143098559),
CoinData(1642641169518, 41907.06638025352),
CoinData(1642644119959, 41813.24412079334),
CoinData(1642647699541, 42072.19957608677),
CoinData(1642651295109, 41995.408525918814),
CoinData(1642654929816, 41969.901994013315),
CoinData(1642658514025, 41923.96890233066),
CoinData(1642662252361, 42064.208021444596),
CoinData(1642665773630, 42113.0463479793),
CoinData(1642669406880, 41964.771542199494),
CoinData(1642672807732, 42153.83194877708),
CoinData(1642676524869, 42155.166974090964),
CoinData(1642680057034, 42210.41697932467),
CoinData(1642683741769, 42078.59816595068),
CoinData(1642687252649, 42457.09178193016),
CoinData(1642690904488, 43120.58908265619),
CoinData(1642694609592, 43308.03956681778),
CoinData(1642698105291, 43299.353057524866),
CoinData(1642701608567, 43056.540669581744),
CoinData(1642705247727, 43149.926635185744),
CoinData(1642708911675, 42946.95943008196),
CoinData(1642712563338, 42612.93819242102),
CoinData(1642716114837, 41368.03820513283),
CoinData(1642719655169, 41244.72558790132),
CoinData(1642723259219, 40707.6824143097),
CoinData(1642726814802, 41011.486226241585),
CoinData(1642730438307, 39502.20976924315),
CoinData(1642734045516, 40005.428327993286),
CoinData(1642737632525, 38595.357998473075),
CoinData(1642741374260, 38972.1426142197),
CoinData(1642744931144, 39069.60851847918),
CoinData(1642748534002, 38825.08225149761),
CoinData(1642752138990, 39285.10057661805),
CoinData(1642755972492, 39282.13205482304),
CoinData(1642759231219, 39146.98486305409),
CoinData(1642762897123, 39029.01940763461),
CoinData(1642766505275, 38972.112801224925),
CoinData(1642770171389, 37978.94600196123),
CoinData(1642773639856, 38683.65020437281),
CoinData(1642777278422, 38477.708224151065),
CoinData(1642780809533, 39161.402329147226),
CoinData(1642784572974, 38684.34956161961),
CoinData(1642788115113, 38357.71969772329),
CoinData(1642791689302, 38555.043969645936),
CoinData(1642795342047, 38203.1890035537),
CoinData(1642798814773, 38178.00057195512),
CoinData(1642802402972, 36018.680208090766),
CoinData(1642806110522, 35761.710943672675),
CoinData(1642809848015, 36385.341362730935),
CoinData(1642814471774, 36342.22689553229),
CoinData(1642816873862, 36637.351584595846),
CoinData(1642820548357, 36639.176855482365),
CoinData(1642824152214, 36317.547348304455),
CoinData(1642827750453, 36412.4702263163),
CoinData(1642831381738, 35732.43347988268),
CoinData(1642834948400, 35869.70749858731),
CoinData(1642838429026, 35580.66865547844),
CoinData(1642842379605, 35692.12145599295),
CoinData(1642845602154, 34658.69118169887),
CoinData(1642849332824, 35631.29321200412),
CoinData(1642852860526, 35423.733623564774),
CoinData(1642856436347, 35952.32534384478),
CoinData(1642860031930, 35680.11740179815),
CoinData(1642863977964, 35193.74160008464),
CoinData(1642867200863, 34991.02054654133),
CoinData(1642870885598, 35109.6564826399),
CoinData(1642874429377, 34631.73103161949),
CoinData(1642878479406, 34527.6528378289),
CoinData(1642881707361, 34602.79496883843),
CoinData(1642885302767, 35464.161836675376),
CoinData(1642888839111, 35630.207411484356),
CoinData(1642892552509, 34935.31059784646),
CoinData(1642896166621, 35180.435462830384),
CoinData(1642899604966, 35432.61134395314),
CoinData(1642903362311, 35448.608106994194),
CoinData(1642906830933, 35044.59262923074),
CoinData(1642910508104, 35176.65728559375),
CoinData(1642914151050, 35348.42857530886),
CoinData(1642917659189, 35591.25705774395),
CoinData(1642921325713, 35342.902225939535),
CoinData(1642924951086, 35673.892148853825),
CoinData(1642928575653, 35760.80532005177),
CoinData(1642932210452, 35974.488705639684),
CoinData(1642935648639, 35898.49265417996),
CoinData(1642939382142, 35764.30539081825),
CoinData(1642942855334, 35924.69475847814),
CoinData(1642946608245, 36066.53867510662),
CoinData(1642950193192, 35208.08509273927),
CoinData(1642954326416, 35476.641272607),
CoinData(1642957238487, 35363.39608281859),
CoinData(1642960836652, 35472.73143627676),
CoinData(1642964487734, 35005.57945651765),
CoinData(1642968200712, 34804.560652713786),
CoinData(1642971750755, 35332.049887473404),
CoinData(1642975229876, 35566.67303014184),
CoinData(1642978900086, 35578.38113726986),
CoinData(1642982449012, 36306.409440464704),
CoinData(1642986538625, 35976.423803204576),
CoinData(1642989785208, 35614.40208623434),
CoinData(1642991427000, 35631.47620568353)
];
有关更多上下文，这就是我要创建的
但这就是我得到的
我不希望它从 0 开始，我希望它从 31,000 之类的最低数字开始，但我不想手动使用该属性visibleMinimum并visibleMaximum设置范围，因为我将使用具有不同值的不同硬币.