我试图设置两个图表,类似于Core绘图提供的AAPlot示例。 它基本上包含一个几乎正确显示的股票图表和一个应放置在股票图表正下方的第二个图表(交易量图表)。两个图表应该共享相同的x轴。核心绘图:共享相同x轴的两个绘图
不幸的是,体积图的数据没有被绘制在我的应用程序中。
尽管我强烈地将示例源代码与我的比较,但我没有发现我的错误的来源。
请你指点我正确的方向?
这是我的代码:代替:当你只是做[volumePlot _graph addPlot]
- (void)configureChart
{
self.graph = [[CPTXYGraph alloc] initWithFrame:self.hostView.bounds];
self.hostView.hostedGraph = self.graph;
self.graph.paddingLeft = 0.0f;
self.graph.paddingTop = 0.0f;
self.graph.paddingRight = 0.0f;
self.graph.paddingBottom = 0.0f;
self.graph.axisSet = nil;
// 2 - Set up text style
CPTMutableTextStyle *textStyle = [CPTMutableTextStyle textStyle];
textStyle.color = [CPTColor grayColor];
textStyle.fontName = @"Helvetica-Bold";
textStyle.fontSize = 16.0f;
// 3 - Configure title
NSString *title = self.issue.company.companyName;
_graph.title = title;
_graph.titleTextStyle = textStyle;
_graph.titlePlotAreaFrameAnchor = CPTRectAnchorTop;
_graph.titleDisplacement = CGPointMake(0.0f, -12.0f);
// 4 - Set theme
[self.graph applyTheme:[CPTTheme themeNamed:kCPTStocksTheme]];
_graph.plotAreaFrame.cornerRadius = 0.0f;
CPTMutableLineStyle *borderLineStyle = [CPTMutableLineStyle lineStyle];
borderLineStyle.lineColor = [CPTColor whiteColor];
borderLineStyle.lineWidth = 2.0f;
_graph.plotAreaFrame.borderLineStyle = borderLineStyle;
// Axes
CPTXYAxisSet *xyAxisSet = (id)self.graph.axisSet;
CPTXYAxis *xAxis = xyAxisSet.xAxis;
CPTMutableLineStyle *lineStyle = [xAxis.axisLineStyle mutableCopy];
lineStyle.lineCap = kCGLineCapButt;
xAxis.axisLineStyle = lineStyle;
xAxis.labelingPolicy = CPTAxisLabelingPolicyNone;
CPTXYAxis *yAxis = xyAxisSet.yAxis;
yAxis.axisLineStyle = nil;
// OHLC plot
CPTMutableLineStyle *whiteLineStyle = [CPTMutableLineStyle lineStyle];
whiteLineStyle.lineColor = [CPTColor whiteColor];
whiteLineStyle.lineWidth = 1.0f;
CPTTradingRangePlot *ohlcPlot = [[CPTTradingRangePlot alloc] initWithFrame:self.graph.bounds];
ohlcPlot.identifier = @"OHLC";
ohlcPlot.lineStyle = whiteLineStyle;
CPTMutableTextStyle *whiteTextStyle = [CPTMutableTextStyle textStyle];
whiteTextStyle.color = [CPTColor whiteColor];
whiteTextStyle.fontSize = 8.0;
ohlcPlot.labelTextStyle = whiteTextStyle;
ohlcPlot.labelOffset = 5.0;
ohlcPlot.stickLength = 2.0f;
ohlcPlot.dataSource = self;
ohlcPlot.plotStyle = CPTTradingRangePlotStyleOHLC;
[self.graph addPlot:ohlcPlot];
// Add volume plot space
CPTXYPlotSpace *volumePlotSpace = [[CPTXYPlotSpace alloc] init];
volumePlotSpace.identifier = @"Volume";
[_graph addPlotSpace:volumePlotSpace];
CPTBarPlot *volumePlot = [CPTBarPlot tubularBarPlotWithColor:[CPTColor whiteColor] horizontalBars:NO];
volumePlot.dataSource = self;
lineStyle = [volumePlot.lineStyle mutableCopy];
lineStyle.lineColor = [CPTColor whiteColor];
volumePlot.lineStyle = lineStyle;
volumePlot.fill = nil;
volumePlot.barWidth = CPTDecimalFromFloat(1.0f);
volumePlot.identifier = @"Volume Plot";
[_graph addPlot:volumePlot toPlotSpace:volumePlotSpace];
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *) self.graph.defaultPlotSpace;
[plotSpace scaleToFitPlots:[self.graph allPlots]];
}
更改代码行时问题仍然存在。基本上,我只是从AAPlot示例中移植源代码,但它在我的设置中不起作用。 – AlexR 2012-07-12 19:51:31
我知道如何设置绘图有一些区别,但是您不用图的边界初始化容积图。另外,你是否运行过调试器,你的volumePlot是否存在或包含信息? – 2012-07-12 19:59:13
volumePlot的数据确实存在,数据源提供正确的数据。我已经在Core Plot示例中设置了体积图(在我的代码:评估图中)。 – AlexR 2012-07-12 20:20:30