迭代JSON给出字符，而不是元素

Question

我正在使用.getJSON将数据拉入图表。出于某种原因，当我尝试循环遍历JSON数组时，它给了我每个单独的字符，就像它没有看到它作为一个数组，但当我将数据转储到控制台时，它是正确格式化的JSON。

  <!DOCTYPE html>
  <html>
  <head>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script>
  $.getJSON("/getgraphdata", function(result) {
      console.log(result.length);                                                                
      testFunction(result);
  });
 </script>
 </head>

 <body>
 <script>
 function testFunction(data) {
     console.log(data); // line 16
     //console.log(data.length); Gives total character count. 
     for(var i = 0; i < data.length; i++) {
         var obj = data[i];

         //console.log(obj.id);
     }
 }


 </script>
 </body>
 </html>

这是直接来自控制台的数据。（从第16行）

[{"id":"1375857","temperature":"78.98","humidity":"90.2","nodeName":"Bsmt_Front","timestamp":"1536424185"},{"id":"1375856","temperature":"78.98","humidity":"77.1","nodeName":"Bsmt_Back","timestamp":"1536424185"},{"id":"1375855","temperature":"77.54","humidity":"49.9","nodeName":"Living_Room","timestamp":"1536424180"},{"id":"1375854","temperature":"0","humidity":"0","nodeName":"Bsmt_Room","timestamp":"1536424179"},{"id":"1375853","temperature":"79.52","humidity":"82.7","nodeName":"Flow_Tent","timestamp":"1536424158"}]

我在这里用JavaScript loop through json array?评价最高的答案

如果我在第21行注释它显示未定义。如果我执行console.log（obj），它会遍历数组中的每个字符。

一切都指向它没有看到它作为一个数组，但[]在那里。

Answer 1

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