jquery每个json函数

Question

我想在JSON数组上使用each()，但我的警报功能未运行。

js fiddle

JS

var calduration = function(){   
    $.each(videoinfo, function(i, obj) {
        alert(obj.startdatetime);
    });
};
var videoinfo = [{"startdatetime":"2014-12-21 00:23:14","totalsecondrun":"2019402310","videolist":
[{"videoid":"uoSDF234","second":"192312"},{"videoid":"0apq3ss","second":"180"}]}];

Answer 1

您需要致电calduration()。

var videoinfo = [{"startdatetime":"2014-12-21 00:23:14","totalsecondrun":"2019402310","videolist": [{"videoid":"uoSDF234","second":"192312"},{"videoid":"0apq3ss","second":"180"}]}];

var calduration = function(){   
    $.each(videoinfo, function(i, obj) {
        alert(obj.startdatetime);
    });
};

calduration();

赞this。

循环遍历videolist数组。你可以添加一个内循环：

$.each(videoinfo, function(i, obj) {
    $.each(obj.videolist, function(i, obj2) {
        alert(obj2.videoid);
    });
});

赞this。

Answer 2

在videoinfo函数上方添加each，calduration功能正常，因此您需要使用()或调用函数进行自我调用，请参阅下面的示例代码

var videoinfo = [{"startdatetime":"2014-12-21 00:23:14","totalsecondrun":"2019402310","videolist":
[{"videoid":"uoSDF234","second":"192312"},{"videoid":"0apq3ss","second":"180"}]}];
var calduration = function(){   
        $.each(videoinfo, function(i, obj) {
            alert(obj.startdatetime);
        });
}();

或

calduration();

或

calduration.call();

<强>更新

$.each(videoinfo[0].videolist, function(i, obj) {
                alert(obj.startdatetime);
            });

或者如果videoinfo有多个对象，那么您可以使用each()函数迭代两次

  var videoinfo = [{
    "startdatetime": "2014-12-21 00:23:14",
    "totalsecondrun": "2019402310",
    "videolist": [{
      "videoid": "uoSDF234",
      "second": "192312"
    }, {
      "videoid": "0apq3ss",
      "second": "180"
    }]
  }];
  $.each(videoinfo, function(i, obj) {
    $.each(obj.videolist, function(j, o) {
      alert(o.videoid);
    });
  });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

Answer 3

试试这个：

var videoinfo = [{"startdatetime":"2014-12-21 00:23:14","totalsecondrun":"2019402310","videolist":
[{"videoid":"uoSDF234","second":"192312"},{"videoid":"0apq3ss","second":"180"}]}];

$(document).ready(function() {
        $.each(videoinfo, function(i, obj) {
            alert(obj.startdatetime);
        });
    });