canDropLabel属性已经被弃用了,如果使用它,会报引用不能为空的异常。
TypeError: Error #1009: 无法访问空对象引用的属性或方法。
at mx.charts.series::ColumnSeries/findDataPoints()[E:/dev/4.0.0/frameworks/projects/datavisualization/src/mx/charts/series/ColumnSeries.as:1635]
at mx.charts.chartClasses::ChartBase/findDataPoints()[E:/dev/4.0.0/frameworks/projects/datavisualization/src/mx/charts/chartClasses/ChartBase.as:2202]
at mx.charts.chartClasses::ChartBase/mouseMoveHandler()[E:/dev/4.0.0/frameworks/projects/datavisualization/src/mx/charts/chartClasses/ChartBase.as:4882]
TypeError: Error #1009: 无法访问空对象引用的属性或方法。
at mx.charts::AxisRenderer/measureHorizontalGutters()[E:/dev/4.0.0/frameworks/projects/datavisualization/src/mx/charts/AxisRenderer.as:2275]
at mx.charts::AxisRenderer/calcRotationAndSpacing()[E:/dev/4.0.0/frameworks/projects/datavisualization/src/mx/charts/AxisRenderer.as:1889]