大家好,我在xamarin的核心情节有问题。我设法创建了如下图表:
我正在使用此代码:
/// <summary>
/// Configure the Axes of the graph
/// </summary>
void SetupAxes()
{
var plotspace = _graph.DefaultPlotSpace;
plotspace.AllowsUserInteraction = true;
var axisSet = (CPTXYAxisSet)_graph.AxisSet;
// Label x with a fixed interval policy
var x = axisSet.XAxis;
x.LabelingPolicy = CPTAxisLabelingPolicy.None;
x.Title = "X Axis";
x.TitleOffset = 0;
x.MinorTickLength = 5f;
x.MajorTickLength = 7f;
x.LabelOffset = 3;
x.MajorIntervalLength = 5;
x.MinorTicksPerInterval = 4;
// Label y with an automatic label policy.
var y = axisSet.YAxis;
y.LabelingPolicy = CPTAxisLabelingPolicy.None;
y.LabelOffset = 0;
y.Title = "Y Axis";
y.TitleOffset = 0;
y.MinorTickLength = 5f;
y.MajorTickLength = 7f;
y.LabelOffset = 3;
y.MajorIntervalLength = 5;
y.MinorTicksPerInterval = 4;
}
/// <summary>
/// Set up data source and configure plots
/// </summary>
void SetupBarPlots(List<float> inputSocket)
{
var barPlot = new CPTBarPlot
{
DataSource = new BarSourceData(inputSocket),
BaseValue = 0,
BarOffset = (NSDecimal)(-0.25),
Identifier = (NSString)"Bar Plot 1"
};
_graph.AddPlot(barPlot);
barPlot.Fill = new CPTFill(CPTColor.BrownColor);
_graph.AddPlot(barPlot, _graph.DefaultPlotSpace);
var space = _graph.DefaultPlotSpace as CPTXYPlotSpace;
space.ScaleToFitPlots(new CPTPlot[] { barPlot });
//get the highest value in the input data
var yMax = (decimal)inputSocket.Max();
decimal newYMax = yMax*2;
space.YRange = new CPTPlotRange(-20, new NSDecimalNumber(newYMax.ToString()).NSDecimalValue);
decimal newXMax = (decimal)space.XRange.MaxLimit + 2;
decimal newXMin = (decimal)space.XRange.MinLimit - 1;
space.XRange = new CPTPlotRange(new NSDecimalNumber(newXMin.ToString()).NSDecimalValue,
new NSDecimalNumber(newXMax.ToString()).NSDecimalValue);
//RectangleF(position x, position y, width, height
//AddSubview = adding a view on top of a View
_view.AddSubview(new CPTGraphHostingView(new RectangleF(20, 320, 662, 320))
{
HostedGraph = _graph
});
}
我想在图表中显示y值(image中的红色方块),因此它看起来像一个正确的图形。任何人都有使用Xamarin / monotouch创建图形的经验吗?对于核心情节,没有太多的xamarin教程。在此之前谢谢:)
答案 0 :(得分:0)
原来我必须将labellingPolicy设置为Automatic。见下文:
y.LabelingPolicy = CPTAxisLabelingPolicy.Automatic;
然后它将根据数据设置y轴值。