Javascript 从JSON.parse数组获取数据

我陷入了这个问题，我正在调用一个返回json响应的Web服务

现在，我想从那个响应中获取一个特定的值，但在互联网上搜索并苦苦挣扎之后，无法修复它

这是我的密码：

var xhr = Titanium.Network.createHTTPClient({

onload : function(e) {
     Ti.API.info("Received text: " + this.responseText);
     alert('success');
     },
 // function called when an error occurs, including a timeout
 onerror : function(e) {
     Ti.API.debug(e.error);
     alert('error');
 },
 timeout : 5000
});

var data = {"data":"system.connect"};
xhr.open("POST","http://mytesturl.net/services/json");
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=utf-8");
xhr.send("method=system.connect");

答案是这样的：

{"#error":false,"#data":{"sessid":"c4likn6vg33hngbpmobisrsbpcjjmf39","user":{"uid":0,"hostname":"102.119.85.120","roles":{"1":"anonymous user"},"session":"","cache":0}},"#response_code":200}

从上面的响应中，我想获取

sessiond

值。

---

什么是正确的方法？

可以在上查看和测试以下内容

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问题是当我试图保存我的响应时，比如

var myData=this.responseText

，然后我记录它，它显示为null。我不知道它为什么显示为null，但当我像这样记录它时，responseText会给出准确的响应

// Given a string of JSON called responseText
var responseText = '{"#error":false,"#data":{"sessid":"c4likn6vg33hngbpmobisrsbpcjjmf39","user":{"uid":0,"hostname":"102.119.85.120","roles":{"1":"anonymous user"},"session":"","cache":0}},"#response_code":200}';

// You can parse it to an object using JSON.parse
var responseObj = JSON.parse(responseText);

// And then access the properties as with any object
console.log(responseObj ["#data"]["sessid"]);