无法访问JSON数组中的项目？
问题描述：
我送其返回以下要求：无法访问JSON数组中的项目？
{
"title": "Recent Uploads",
"link": "http://www.flickr.com/photos/",
"description": "",
"generator": "http://www.flickr.com/",
"items": [
{
"title": "Title 1",
"link": "http://www.flickr.com/photos/123"
} ]
}
然而，当我尝试访问中，我得到一个“未定义”有价值的东西：
xml.onreadystatechange = function() {
if (xml.readyState == 4 && xml.status == 200) {
var rsp = xml.rspTxt
console.log(rsp.title);
}
}
我在做什么错？据我所知，这应该工作...
编辑：Fiddle。
答
这是因为你的JSON是不是一个有效的JSON所有..
var test = {
"title": "Recent Uploads",
"link": "http://www.flickr.com/photos/",
"description": "",
"generator": "http://www.flickr.com/",
"items": {
"title": "Title 1",
"link": "http://www.flickr.com/photos/123"
}
};
console.log(test.title);
该作品在“最近上传”精而导致控制台。最后不能有'[''和'，'。
+0
很高兴我帮助@Anik Islam Abni与他的回答 –
+0
嗨JSON是正确的，我用小提琴更新了我的问题 –
答
正如其他人之前所述，您从该调用中获得的JSON响应无效。
{
"title": "Recent Uploads tagged potato",
"link": "https://www.flickr.com/photos/tags/potato/",
"description": "",
"modified": "2015-10-14T09:17:25Z",
"generator": "https://www.flickr.com/",
"items": [
{
"title": "French fries",
"link": "https://www.flickr.com/photos/[email protected]/22159555595/",
"media": {"m":"https://farm1.staticflickr.com/758/22159555595_0a1ba32e44_m.jpg"},
"date_taken": "2008-06-18T16:50:34-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/[email protected]/\">Chulpa<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/[email protected]/22159555595/\" title=\"French fries\"><img src=\"https://farm1.staticflickr.com/758/22159555595_0a1ba32e44_m.jpg\" width=\"240\" height=\"160\" alt=\"French fries\" /><\/a><\/p> <p>Heap of crisp French fries - detail<\/p>",
"published": "2015-10-14T09:17:25Z",
"author": "[email protected] (Chulpa)",
"author_id": "[email protected]",
"tags": "hot detail macro closeup studio fastfood tasty sidedish frenchfries chips crisp potato snack junkfood takeaway portion sliced popular unhealthy baked roasted deepfried fattening accompaniment pommefrites takeoutfood"
},
{
"title": "potatowedges",
"link": "https://www.flickr.com/photos/[email protected]/22131498326/",
"media": {"m":"https://farm1.staticflickr.com/700/22131498326_05d9f67dac_m.jpg"},
"date_taken": "2015-10-14T00:23:48-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/[email protected]/\">amandahar<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/[email protected]/22131498326/\" title=\"potatowedges\"><img src=\"https://farm1.staticflickr.com/700/22131498326_05d9f67dac_m.jpg\" width=\"240\" height=\"240\" alt=\"potatowedges\" /><\/a><\/p> ",
"published": "2015-10-14T07:23:48Z",
"author": "[email protected] (amandahar)",
"author_id": "[email protected]",
"tags": "potato potatowedges"
},
{
"title": "Shadows and Potato van in Preston",
"link": "https://www.flickr.com/photos/tonyworrall/21968606450/",
"media": {"m":"https://farm1.staticflickr.com/758/21968606450_3a9c70e5bc_m.jpg"},
"date_taken": "2015-09-30T13:12:20-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/tonyworrall/\">Tony Worrall Foto<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/tonyworrall/21968606450/\" title=\"Shadows and Potato van in Preston\"><img src=\"https://farm1.staticflickr.com/758/21968606450_3a9c70e5bc_m.jpg\" width=\"240\" height=\"171\" alt=\"Shadows and Potato van in Preston\" /><\/a><\/p> <p>© 2015 Tony Worrall<\/p>",
"published": "2015-10-14T06:34:58Z",
"author": "[email protected] (Tony Worrall Foto)",
"author_id": "[email protected]",
"tags": "county street uk england people urban food lunch stream tour shadows open place northwest unitedkingdom candid country north visit location lancashire eat potato queue area buy preston van northern update streetfood attraction lancs welovethenorth :copyright:2015tonyworrall"
},
{
"title": "thực phẩm giàu dinh dưỡng",
"link": "https://www.flickr.com/photos/[email protected]/22156604725/",
"media": {"m":"https://farm6.staticflickr.com/5751/22156604725_882ca5642d_m.jpg"},
"date_taken": "2012-08-06T16:59:38-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/[email protected]/\">hoaithuong0115<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/[email protected]/22156604725/\" title=\"thực phẩm giàu dinh dưỡng\"><img src=\"https://farm6.staticflickr.com/5751/22156604725_882ca5642d_m.jpg\" width=\"240\" height=\"160\" alt=\"thực phẩm giàu dinh dưỡng\" /><\/a><\/p> <p>Xem: <a href=\"http://emdep.vn/thuc-don-giam-can-s275.htm\" rel=\"nofollow\">emdep.vn/thuc-don-giam-can-s275.htm<\/a><\/p>",
"published": "2015-10-14T06:25:03Z",
"author": "[email protected] (hoaithuong0115)",
"author_id": "[email protected]",
"tags": "red food orange green apple mushroom fruits vegetables tomato pepper healthy natural display market sweet tomatoes olive banana supermarket lettuce potato pineapple asparagus crop snack carrot pear cauliflower garlic produce onion feed organic grocery fiber eats edible goodies eatable groceries arrangement grape combination nutrition lowfat nourishment nutrients nonfat provision lowcalorie nutriment"
},
{
"title": "",
"link": "https://www.flickr.com/photos/underthetuliptree/21959671820/",
"media": {"m":"https://farm6.staticflickr.com/5803/21959671820_f60c0cd98f_m.jpg"},
"date_taken": "2012-07-12T14:22:38-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/underthetuliptree/\">julianna smith<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/underthetuliptree/21959671820/\" title=\"\"><img src=\"https://farm6.staticflickr.com/5803/21959671820_f60c0cd98f_m.jpg\" width=\"160\" height=\"240\" alt=\"\" /><\/a><\/p> <p>Potato cakes with onions and spinach<\/p>",
"published": "2015-10-13T22:42:18Z",
"author": "[email protected] (julianna smith)",
"author_id": "[email protected]",
"tags": "food cakes dinner vegan smith potato julianna"
},
{
"title": "Prague 14",
"link": "https://www.flickr.com/photos/[email protected]/22106050326/",
"media": {"m":"https://farm6.staticflickr.com/5636/22106050326_67983e253b_m.jpg"},
"date_taken": "2015-10-04T14:44:43-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/[email protected]/\">MichaelWard82<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/[email protected]/22106050326/\" title=\"Prague 14\"><img src=\"https://farm6.staticflickr.com/5636/22106050326_67983e253b_m.jpg\" width=\"240\" height=\"160\" alt=\"Prague 14\" /><\/a><\/p> ",
"published": "2015-10-13T10:46:54Z",
"author": "[email protected] (MichaelWard82)",
"author_id": "[email protected]",
"tags": "food republic czech prague potato twirl"
},
{
"title": "My Dinner",
"link": "https://www.flickr.com/photos/sarahjdhue/21941657920/",
"media": {"m":"https://farm6.staticflickr.com/5701/21941657920_53387b668c_m.jpg"},
"date_taken": "2015-10-11T15:17:25-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/sarahjdhue/\">SarahJDhue<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/sarahjdhue/21941657920/\" title=\"My Dinner\"><img src=\"https://farm6.staticflickr.com/5701/21941657920_53387b668c_m.jpg\" width=\"240\" height=\"181\" alt=\"My Dinner\" /><\/a><\/p> <p>Weinerschnitzel ala Holstein -Sarah J Dhue<\/p>",
"published": "2015-10-13T08:11:25Z",
"author": "[email protected] (SarahJDhue)",
"author_id": "[email protected]",
"tags": "red food pancakes dinner restaurant illinois october yum egg cellphone samsung palace il potato german ala cabbage fried dreamland applesauce holstein veal weinerschnitzel galaxys6 sarahjdhuephotos sarahjdhue"
},
{
"title": "Open Faced at Old Vine Cafe",
"link": "https://www.flickr.com/photos/[email protected]/22136102231/",
"media": {"m":"https://farm6.staticflickr.com/5651/22136102231_984461d378_m.jpg"},
"date_taken": "2015-09-19T22:02:02-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/[email protected]/\">deeeelish<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/[email protected]/22136102231/\" title=\"Open Faced at Old Vine Cafe\"><img src=\"https://farm6.staticflickr.com/5651/22136102231_984461d378_m.jpg\" width=\"240\" height=\"149\" alt=\"Open Faced at Old Vine Cafe\" /><\/a><\/p> <p>Fresh Biscuit, Chicken Sausage, Scrambled Eggs, Chipotle Gravy & Queso Fresco with Potatoes <br /> <br /> Costa Mesa, CA<\/p>",
"published": "2015-10-13T04:30:52Z",
"author": "[email protected] (deeeelish)",
"author_id": "[email protected]",
"tags": "gravy potato eggs quesofresno"
},
{
"title": "Omelette at Old Vine Cafe",
"link": "https://www.flickr.com/photos/[email protected]/21938083198/",
"media": {"m":"https://farm1.staticflickr.com/593/21938083198_046a230259_m.jpg"},
"date_taken": "2015-09-19T22:02:47-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/[email protected]/\">deeeelish<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/[email protected]/21938083198/\" title=\"Omelette at Old Vine Cafe\"><img src=\"https://farm1.staticflickr.com/593/21938083198_046a230259_m.jpg\" width=\"240\" height=\"156\" alt=\"Omelette at Old Vine Cafe\" /><\/a><\/p> <p>Costa Mesa, CA<\/p>",
"published": "2015-10-13T04:30:54Z",
"author": "[email protected] (deeeelish)",
"author_id": "[email protected]",
"tags": "potato eggs omelette"
},
{
"title": "Chicken",
"link": "https://www.flickr.com/photos/jorkew/22106677661/",
"media": {"m":"https://farm6.staticflickr.com/5710/22106677661_00d43a64bc_m.jpg"},
"date_taken": "2015-09-05T00:00:00-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/jorkew/\">Jorkew<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/jorkew/22106677661/\" title=\"Chicken\"><img src=\"https://farm6.staticflickr.com/5710/22106677661_00d43a64bc_m.jpg\" width=\"160\" height=\"240\" alt=\"Chicken\" /><\/a><\/p> <p>Kodak Ektar 100<br /> Canon eos 1<br /> Canon EF 24-70mm f/2.8 L USM<br /> <br /> A few test shots from the new camera. <br /> <br /> <a href=\"http://jorkew.com/\" rel=\"nofollow\">Website<\/a> | <a href=\"http://facebook.com/jorkewphotography\" rel=\"nofollow\">Facebook<\/a><\/p>",
"published": "2015-10-12T20:40:00Z",
"author": "[email protected] (Jorkew)",
"author_id": "[email protected]",
"tags": "camera red food chicken film analog canon photography eos 1 potatoes oven kodak kip potato l produce 100 usm filmcamera 135 done canoneos f28 canonef2470mmf28lusm ef baked eos1 ektar foodphotography 2470mm analogcamera llens kodak100 filmisnotdead canoneos1 canonllens kodakektar canon2470mmf28 kodakcolorfilm canonef2470mm ektar100 canonanalogcamera staybrokeshootfilm canoneos1analog canoneos1filmcamera"
},
{
"title": "Alice in Wonderland Pitstop",
"link": "https://www.flickr.com/photos/magicattic88/21491271583/",
"media": {"m":"https://farm1.staticflickr.com/746/21491271583_5113d90565_m.jpg"},
"date_taken": "2015-10-07T00:00:00-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/magicattic88/\">Darling Starlings<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/magicattic88/21491271583/\" title=\"Alice in Wonderland Pitstop\"><img src=\"https://farm1.staticflickr.com/746/21491271583_5113d90565_m.jpg\" width=\"240\" height=\"240\" alt=\"Alice in Wonderland Pitstop\" /><\/a><\/p> <p>After seeing Terry Wogan in the Waterstones tent - CheltLitFest 2015 - Jue [https://www.flickr.com/photos/pyride] and I wandered around a bit - we found this lovely little Alice in Wonderland themed café on the Festival site. It called for a Penelope Pitstop of crunchy lattice chips with dips and a coffee each - yum. Just what was needed :)).<\/p>",
"published": "2015-10-12T16:17:19Z",
"author": "[email protected] (Darling Starlings)",
"author_id": "[email protected]",
"tags": "food coffee festival hearts town cafe penelope poinsettia hats literature chips potato pitstop cheltenham lattice aliceinwonderland dips imperialgardens 2015 candlebra bigteacup cheltlitfest"
},
{
"title": "Giant potatomobile",
"link": "https://www.flickr.com/photos/asciident/22079616896/",
"media": {"m":"https://farm6.staticflickr.com/5765/22079616896_c1bedd0a4a_m.jpg"},
"date_taken": "2015-10-04T17:10:42-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/asciident/\">asciident<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/asciident/22079616896/\" title=\"Giant potatomobile\"><img src=\"https://farm6.staticflickr.com/5765/22079616896_c1bedd0a4a_m.jpg\" width=\"240\" height=\"202\" alt=\"Giant potatomobile\" /><\/a><\/p> <p>Near Wendell, Idaho<br /> <br /> Excuse the thumb, I was in a hurry to catch the potatomobile!<\/p>",
"published": "2015-10-12T06:59:23Z",
"author": "[email protected] (asciident)",
"author_id": "[email protected]",
"tags": "idaho potato wendell potatomobile"
},
{
"title": "Giant potatomobile",
"link": "https://www.flickr.com/photos/asciident/22115860151/",
"media": {"m":"https://farm1.staticflickr.com/646/22115860151_c18609aa78_m.jpg"},
"date_taken": "2015-10-04T17:10:45-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/asciident/\">asciident<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/asciident/22115860151/\" title=\"Giant potatomobile\"><img src=\"https://farm1.staticflickr.com/646/22115860151_c18609aa78_m.jpg\" width=\"186\" height=\"240\" alt=\"Giant potatomobile\" /><\/a><\/p> <p>Near Wendell, Idaho<\/p>",
"published": "2015-10-12T06:59:24Z",
"author": "[email protected] (asciident)",
"author_id": "[email protected]",
"tags": "idaho potato wendell potatomobile"
},
{
"title": "Giant potatomobile",
"link": "https://www.flickr.com/photos/asciident/21917906328/",
"media": {"m":"https://farm1.staticflickr.com/684/21917906328_fb679fb950_m.jpg"},
"date_taken": "2015-10-04T17:10:44-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/asciident/\">asciident<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/asciident/21917906328/\" title=\"Giant potatomobile\"><img src=\"https://farm1.staticflickr.com/684/21917906328_fb679fb950_m.jpg\" width=\"240\" height=\"180\" alt=\"Giant potatomobile\" /><\/a><\/p> <p>Near Wendell, Idaho<\/p>",
"published": "2015-10-12T06:59:24Z",
"author": "[email protected] (asciident)",
"author_id": "[email protected]",
"tags": "idaho potato wendell potatomobile"
},
{
"title": "Giant potatomobile",
"link": "https://www.flickr.com/photos/asciident/22093267702/",
"media": {"m":"https://farm1.staticflickr.com/749/22093267702_5f51f6e60e_m.jpg"},
"date_taken": "2015-10-04T17:10:47-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/asciident/\">asciident<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/asciident/22093267702/\" title=\"Giant potatomobile\"><img src=\"https://farm1.staticflickr.com/749/22093267702_5f51f6e60e_m.jpg\" width=\"240\" height=\"180\" alt=\"Giant potatomobile\" /><\/a><\/p> <p>Near Wendell, Idaho<\/p>",
"published": "2015-10-12T06:59:25Z",
"author": "[email protected] (asciident)",
"author_id": "[email protected]",
"tags": "idaho potato wendell potatomobile"
},
{
"title": "Giant potatomobile",
"link": "https://www.flickr.com/photos/asciident/21917907758/",
"media": {"m":"https://farm6.staticflickr.com/5744/21917907758_f1130f8768_m.jpg"},
"date_taken": "2015-10-04T17:10:40-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/asciident/\">asciident<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/asciident/21917907758/\" title=\"Giant potatomobile\"><img src=\"https://farm6.staticflickr.com/5744/21917907758_f1130f8768_m.jpg\" width=\"240\" height=\"200\" alt=\"Giant potatomobile\" /><\/a><\/p> <p>Near Jerome, Idaho<\/p>",
"published": "2015-10-12T06:59:23Z",
"author": "[email protected] (asciident)",
"author_id": "[email protected]",
"tags": "idaho potato jerome potatomobile"
},
{
"title": "Twister Potato Chip",
"link": "https://www.flickr.com/photos/jimmychuah/22104255305/",
"media": {"m":"https://farm6.staticflickr.com/5714/22104255305_abe56671da_m.jpg"},
"date_taken": "2015-09-11T16:22:14-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/jimmychuah/\">Jimmy Chuah<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/jimmychuah/22104255305/\" title=\"Twister Potato Chip\"><img src=\"https://farm6.staticflickr.com/5714/22104255305_abe56671da_m.jpg\" width=\"240\" height=\"160\" alt=\"Twister Potato Chip\" /><\/a><\/p> ",
"published": "2015-10-12T05:23:56Z",
"author": "[email protected] (Jimmy Chuah)",
"author_id": "[email protected]",
"tags": "travel food holiday stall korea potato snack seoul koreanfood myeongdong 2015"
},
{
"title": "Potato Rolled Shrimp",
"link": "https://www.flickr.com/photos/jimmychuah/21917351019/",
"media": {"m":"https://farm1.staticflickr.com/694/21917351019_d93527d6d7_m.jpg"},
"date_taken": "2015-09-11T17:18:27-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/jimmychuah/\">Jimmy Chuah<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/jimmychuah/21917351019/\" title=\"Potato Rolled Shrimp\"><img src=\"https://farm1.staticflickr.com/694/21917351019_d93527d6d7_m.jpg\" width=\"240\" height=\"160\" alt=\"Potato Rolled Shrimp\" /><\/a><\/p> ",
"published": "2015-10-12T05:24:05Z",
"author": "[email protected] (Jimmy Chuah)",
"author_id": "[email protected]",
"tags": "travel food holiday stall shrimp korea potato snack seoul koreanfood myeongdong 2015"
},
{
"title": "fzk_188_28082015_09\'48",
"link": "https://www.flickr.com/photos/eduard_buerge-rafz/21901809028/",
"media": {"m":"https://farm1.staticflickr.com/619/21901809028_7637fa8cd4_m.jpg"},
"date_taken": "2015-08-28T09:48:46-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/eduard_buerge-rafz/\">eduard43<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/eduard_buerge-rafz/21901809028/\" title=\"fzk_188_28082015_09\'48\"><img src=\"https://farm1.staticflickr.com/619/21901809028_7637fa8cd4_m.jpg\" width=\"240\" height=\"135\" alt=\"fzk_188_28082015_09\'48\" /><\/a><\/p> <p>Die Kartoffel (Solanum tuberosum).<br /> The potato (Solanum tuberosum).<\/p>",
"published": "2015-10-11T12:22:17Z",
"author": "[email protected] (eduard43)",
"author_id": "[email protected]",
"tags": "potato kartoffeln naturalproducts solanumtuberosum potatoplants naturprodukte kartoffelstauden"
},
{
"title": "fzk_189_28082015_09\'48",
"link": "https://www.flickr.com/photos/eduard_buerge-rafz/22077208832/",
"media": {"m":"https://farm1.staticflickr.com/761/22077208832_e1616a4351_m.jpg"},
"date_taken": "2015-08-28T09:48:51-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/eduard_buerge-rafz/\">eduard43<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/eduard_buerge-rafz/22077208832/\" title=\"fzk_189_28082015_09\'48\"><img src=\"https://farm1.staticflickr.com/761/22077208832_e1616a4351_m.jpg\" width=\"135\" height=\"240\" alt=\"fzk_189_28082015_09\'48\" /><\/a><\/p> <p>Die Kartoffel (Solanum tuberosum).<br /> The potato (Solanum tuberosum).<\/p>",
"published": "2015-10-11T12:22:16Z",
"author": "[email protected] (eduard43)",
"author_id": "[email protected]",
"tags": "potato kartoffeln naturalproducts solanumtuberosum potatoplants naturprodukte kartoffelstauden"
}
]
}
您可以检查出来jsonlint.com，数组中的最后两个对象有坏逃逸等问题...如果我手动删除它们响应的其余部分是一个有效的JSON。你不能解决这个问题，但必须要求flickr提供有效的JSON。
+0
谢谢。原来的问题是我无法访问JSON内的东西，所以有办法删除客户端的最后两个对象？ –
+0
只能使用string.split（），这就是为什么你想首先使用JSON：不要自己进行字符串解析。你应该联系flickr api支持/开发者论坛并且要求修正，我想这可能就是这个对于一些奇怪的标题数据无效的特定请求。 – Danmoreng
检查console.log（rsp [0] .title）;记录任何数据 – wayzz
@wayzz否，仍未定义。不是索引问题 –
尝试var rsp = JSON.parse（xml.rspTxt） –