ios - iOS图表标记未针对所有图表元素显示

Question

我在图表中使用的BalloonMarker出现问题，因为它不会显示所有图表元素的标记，而只会显示其中一个。

我将ChartsDemo项目中的BalloonMarker用于条形图。标记将显示，但仅用于图表中的一个条形图。我不知道这是否是巧合，但它从中间开始显示在酒吧上。

我看不到我在这里想念的东西。我可以添加任何错误或任何其他设置以使标记正确显示吗？

这是我用来为图表创建BallonMarker的代码:

BalloonMarker *balloonMarker = [[BalloonMarker alloc]
                         initWithColor: [UIColor colorWithWhite:180/255. alpha:0.9]
                         font: [UIFont systemFontOfSize:10.0]
                         textColor: UIColor.whiteColor
                         insets: UIEdgeInsetsMake(8.0, 8.0, 20.0, 8.0)];
balloonMarker.chartView = barChartOrdersView;
balloonMarker.minimumSize = CGSizeMake(40.f, 20.f);

我使用以下代码将标记添加到了图表:

barChartOrdersView.drawMarkers = YES;
barChartOrdersView.marker = balloonMarker;

条形图的属性为:

barChartOrdersView.gridBackgroundColor = [UIColor whiteColor];
barChartOrdersView.backgroundColor = [UIColor whiteColor];

barChartOrdersView.drawBarShadowEnabled = NO;
barChartOrdersView.drawValueAboveBarEnabled = YES;
barChartOrdersView.chartDescription.enabled = NO;
barChartOrdersView.dragEnabled = NO;
[barChartOrdersView setScaleEnabled:NO];
barChartOrdersView.pinchZoomEnabled = NO;

barChartOrdersView.rightAxis.enabled = NO;

barChartOrdersView.leftAxis.drawGridLinesEnabled = YES;
barChartOrdersView.leftAxis.drawLabelsEnabled = YES;
barChartOrdersView.leftAxis.labelFont = [UIFont systemFontOfSize:10.f];
barChartOrdersView.leftAxis.labelPosition = YAxisLabelPositionOutsideChart;
barChartOrdersView.leftAxis.spaceTop = 0.15;
barChartOrdersView.leftAxis.axisMinimum = 0.0;

barChartOrdersView.xAxis.labelPosition = XAxisLabelPositionBottom;
barChartOrdersView.xAxis.drawGridLinesEnabled = NO;
barChartOrdersView.xAxis.axisMinimum = 0.0;
barChartOrdersView.xAxis.granularity = 1.0;
barChartOrdersView.xAxis.labelFont = [UIFont systemFontOfSize:10.f];
barChartOrdersView.xAxis.drawGridLinesEnabled = NO;
barChartOrdersView.xAxis.granularity = 1.0;
barChartOrdersView.xAxis.labelCount = 7;
barChartOrdersView.xAxis.valueFormatter = [DayAxisValueFormatter new];

barChartOrdersView.legend.enabled = YES;
barChartOrdersView.legend.horizontalAlignment = ChartLegendHorizontalAlignmentLeft;
barChartOrdersView.legend.verticalAlignment = ChartLegendVerticalAlignmentBottom;
barChartOrdersView.legend.orientation = ChartLegendOrientationHorizontal;
barChartOrdersView.legend.drawInside = NO;
barChartOrdersView.legend.form = ChartLegendFormSquare;
barChartOrdersView.legend.formSize = 9.0;
barChartOrdersView.legend.font = [UIFont fontWithName:@"HelveticaNeue-Light" size:11.f];
barChartOrdersView.legend.xEntrySpace = 4.0;

Answer 1

确保您传入的条目按x值的升序排序。
如前所述，无序条目可能会导致意外行为，例如数据集闪烁或标记不可轻按。