绘制图表后，从图表对象更改Highcharts工具提示格式器

问题描述

我发现我可以使用setData更改系列，并且我知道我可以使用.setExtremes修改Max值，但我无法弄清楚如何从图表对象设置工具提示格式器。
如何更新该栏位？
如果我有一个图表对象，我该如何更新其工具提示格式器属性？以及plotOptions工具提示格式化程序如何？

我曾尝试过：

  
您可以使用 chart.tooltip.options.formatter 像
  chart.tooltip.options.formatter = function（）{
 var xyArr = []; 
 $ .each（this.points，function（）{
 xyArr.push（'Serie：'+ this.series.name +'，'+'X：'+ this.x +'， Y：'+ this.y）; 
}）; 
 return xyArr.join（'< br />'）; 
} 
  
     
 
 
 更新 
在高图的新版本（5.0.0+）这也可以使用   
I have found that I can change series with setData, and I know I can modify Max values with .setExtremes , but I cannot figure out how to set the tooltip formatter from the chart object. How do I update that field ?If i have a chart object , how do I update its tooltip formatter property ? and How about the plotOptions tooltip formatter?
What I have tried :
chart1.tooltip.formatter = function() {return ''+this.series.name +'example: '+ this.y      +'example';};
But nothing changed in my tooltips when i added that after the chart definition (for testing). Also, I noted that this    
console.log (chart1.tooltip.formatter);
returns undefined, but I don't know why. 
Fiddle so you can try it out. 
http://jsfiddle.net/pCuUW/5/Thanks in advance. 
 解决方案 
You can use chart.tooltip.options.formatter instead, like
chart.tooltip.options.formatter = function() {
    var xyArr=[];
    $.each(this.points,function(){
        xyArr.push('Serie: ' + this.series.name + ', ' +'X: ' + this.x + ', Y: ' +this.y);
    });
    return xyArr.join('<br/>');
}
Changing tooltip formatter dynamically | Highchart & Highstock @ jsFiddle
UPDATEIn new (5.0.0+) versions of highcharts, this can also be done using the chart.update() method
  chart.update({
    tooltip: {
      formatter: function() {
        var xyArr = [];
        $.each(this.points, function() {
          xyArr.push('Serie: ' + this.series.name + ', ' + 'X: ' + this.x + ', Y: ' + this.y);
        });
        return xyArr.join('<br/>');
      }
    }
  });
Changing tooltip formatter dynamically with chart.update | Highchart & Highstock @ jsFiddle
                        
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