AAChartModel
绘制图表时数据量过多，有些点Tooltips会显示不出来
数据大概五六百条，绘制完成后，手指滑动发现tooltip有些点不会显示出来，并且在moveOverEventMessage代理方法中，index也是直接跳过，比如221下一个直接223。请问有办法解决吗？
在Demo中setCrosshairAndTooltipToTheDefaultPositionAfterLoadingChart我构造600条数据，打印结果如下，会缺少index.
👌👌👌👌 user finger moved over!!!,get the move over event series element message: { "y" : 0.053594312643072177, "index" : 20, "offset" : { "plotX" : 16.249599004876998, "plotY" : 635.77462832264996 }, "name" : "Tokyo Hot", "x" : 20, "category" : 20 } 👌👌👌👌 user finger moved over!!!,get the move over event series element message: { "y" : 0.45894135638581157, "index" : 21, "offset" : { "plotX" : 16.874824053160001, "plotY" : 376.91967625328999 }, "name" : "Tokyo Hot", "x" : 21, "category" : 21 } 👌👌👌👌 user finger moved over!!!,get the move over event series element message: { "y" : 0.26917025406592765, "index" : 23, "offset" : { "plotX" : 18.125274149727002, "plotY" : 498.10765666037003 }, "name" : "Tokyo Hot", "x" : 23, "category" : 23 }