jQuery访问JSON对象

Question

如何使用jQuery访问Object Literal中项目的名称？

例如,我将如何读取"标题","链接","媒体"等内容

{
    "title": "What we do in our free time...",
    "link": "http://www.flickr.com/photos/tnhimmies/4042938515/",
    "media": {"m":"http://farm3.static.flickr.com/2572/4042938515_3a00561320_m.jpg"},
    "date_taken": "2009-10-24T03:48:10-08:00",
    "description": "<p><a href=\"http://www.flickr.com/people/tnhimmies/\">Darlene, TN Persians (www.tnpurrs.com)<\/a> posted a photo:<\/p> <p><a href=\"http://www.flickr.com/photos/tnhimmies/4042938515/\" title=\"What we do in our free time...\"><img src=\"http://farm3.static.flickr.com/2572/4042938515_3a00561320_m.jpg\" width=\"240\" height=\"230\" alt=\"What we do in our free time...\" /><\/a><\/p> <p>Tennessee Persians<br /> <a href=\"http://www.tnpurrs.com\" rel=\"nofollow\">www.tnpurrs.com<\/a><\/p>",
    "published": "2009-10-25T18:28:36Z",
    "author": "nobody@flickr.com (Darlene, TN Persians (www.tnpurrs.com))",
    "author_id": "66405213@N00",
    "tags": "cat persian tnpurrs"
},

Answer 1

您还可以使用$ .each函数:

var obj = { one:1, two:2, three:3, four:4, five:5 };

$.each(obj, function(key, value) {
  //..
});

如果你采用for...in语句方式,我建议你检查属性是否直接驻留在被迭代的对象上,因为如果扩展了Object.prototype ,你可能会遇到一些 问题:

for(var key in obj) {
  if (obj.hasOwnProperty(key)){
    // value = obj[key];
  }
}

Answer 2

for (var key in json) {
  // ...
}

(这是标准的javascript,而不是jQuery-speficic)