我在下面有以下AJAX函数。问题是我在AJAX的成功函数中获得了正确的响应头，但是当我解析响应时，我得到了undefined。
我收到的JSON数据如下所示：
[{"responseCode":1,"msg":"Successfully done!"}]
JS
// Renaming am item
filelist.on('click', '.btn-rename', function(){
var that = this; //Save the scope of the button that was clicked
var id = $(this).data('id');
var name = $(this).data('filename');
var jc = $.confirm({
theme: 'black',
type: 'dark',
typeAnimated: true,
title: 'Rename this file?',
icon: 'fa fa-pencil-square-o',
content: '<input id="newName" type="text" value="'+name+'"/><span id="response"></span>',
onOpen: function() {
var element = $('#newName');
element.focus();
element.select();
},
buttons: {
save: {
text: 'Rename',
btnClass: 'btn-dark',
action: function() {
this === jc;
var inputName = $('#newName').val();
if(inputName == '') {
$('#response').html('Please enter a new name..').addClass('responseAlert');
return false;
}
else
if(inputName == name) {
$('#response').html(' C'mon! Don't be silly..').addClass('responseWarning');
return false;
}
//Send request to update the name
$.ajax({
type:"POST",
url:"rename.php",
data: {
fileId: id,
newName: inputName
},
beforeSend: function() {
$('#response').html('<i class="fa fa-spinner fa-spin" aria-hidden="true"></i> Working on it...').addClass('responseProcessing');
},
success: function(data){
var obj = JSON.parse(data);
var status = obj.responseCode;
alert(obj.responseCode);
if(status == 1) {
jc.close();
$.alert({
theme: 'black',
icon: 'fa fa-check',
title: 'Success',
type: 'green',
typeAnimated: true,
content : response.msg
});
}
else {
$('#response').html(response.msg).addClass('responseAlert');
}
}
});
return false;
}
},
cancel: {
}
}
});
return false;
});
解析响应后，它将转换为JSON Array，并将该对象索引为第一个元素。请注意，括号[]是造成这种情况的原因。
var a = JSON.parse('[{"responseCode":1,"msg":"Successfully done!"}]');
console.log(a); // [Object]
console.log(a[0]); // {"responseCode":1,"msg":"Successfully done!"}
var a = JSON.parse('[{"responseCode":1,"msg":"Successfully done!"}]');
console.log(a); // [Object]
console.log(a[0]); // {"responseCode":1,"msg":"Successfully done!"}解析不带括号的字符串会产生所需的对象
var a = JSON.parse('{"responseCode":1,"msg":"Successfully done!"}');
console.log(a); // {"responseCode":1,"msg":"Successfully done!"}
var a = JSON.parse('{"responseCode":1,"msg":"Successfully done!"}');
console.log(a); // {"responseCode":1,"msg":"Successfully done!"} 您需要从后端卸下那些支架。
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