如何访问setinterval函数内的javascript数组值

Question

如何从setinterval中定义的函数内访问系列数据。当我尝试访问任何值，甚至数组长度时，它说未定义。

events: { 
       load: function() { 

        // set up the updating of the chart each second 
        var series0 = this.series[0]; 
        var series1 = this.series[1]; 
        var series2 = this.series[2]; 
        var series3 = this.series[3]; 
        setInterval(function() { 
         var y = $.ajax({url: "/index.php/control/fetch/<?php echo $uid; ?>",async: false}).responseText; 
          y = y.split(" "); 
         var x = parseInt(y[0]); 
         //alert("x = " + series0[0]); 
         //alert("len is " + parseInt(series0.length)); 
         series0.addPoint([x, parseFloat(y[1])], true, true); 
         series1.addPoint([x, parseFloat(y[2])], true, true); 
         series2.addPoint([x, parseFloat(y[3])], true, true); 
         series3.addPoint([x, parseFloat(y[4])], true, true); 

        }, 5000); 
       } 
      } 

感谢

Answer 1

你需要做出的setInterval回调函数外这的参考。类似这样的：

load : function() { 
... 
var _self = this; 
setInterval(function() { 
    console.log(_self.series); 
}, 5000); 
}