我有 api 它返回 json 响应( https://pixabay.com/api/?key=10961259-e4e939648ed5abb6879f1fbbc&q=yellow+flowers&image_type=photo）
\n\n我想访问参数（webformatURL、标签我想从响应中我发出了 URL 会话请求并获取数据如下所示。我如何从 swift 的响应中查询和访问这些参数。我是编程新手，请快速建议我。
\n\n//Mark:- Method to fetch data from the url\nfunc getDataFromUrl(){\n let url = URL(string: "https://pixabay.com/api/?key=10961259-e4e939648ed5abb6879f1fbbc&q=yellow+flowers&image_type=photo")\n let request = NSMutableURLRequest(url: url!)\n request.httpMethod = "GET"\n let session = URLSession.shared\n let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in\n if error == nil\n {\n do\n {\n let respDict = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.allowFragments) \n\n print("Some Data: \\(respDict)")\n\n }\n catch let error2 as NSError\n {\n print(error2)\n }\n }\n })\n dataTask.resume()\n}\n响应是：
\n\n{\n"totalHits": 500,\n"hits": [\n {\n "largeImageURL": "https://pixabay.com/get/ea35b70c2afc053ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_1280.jpg",\n "webformatHeight": 426,\n "webformatWidth": 640,\n "likes": 848,\n "imageWidth": 6000,\n "id": 3063284,\n "user_id": 1564471,\n "views": 476351,\n "comments": 191,\n "pageURL": "https://pixabay.com/en/rose-flower-petal-floral-noble-3063284/",\n "imageHeight": 4000,\n "webformatURL": "https://pixabay.com/get/ea35b70c2afc053ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_640.jpg",\n "type": "photo",\n "previewHeight": 99,\n "tags": "rose, flower, petal",\n "downloads": 288342,\n "user": "annca",\n "favorites": 720,\n "imageSize": 3574625,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2015/11/27/06-58-54-609_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2018/01/05/16/24/rose-3063284_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/ea34b00c2bf5093ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_1280.jpg",\n "webformatHeight": 426,\n "webformatWidth": 640,\n "likes": 706,\n "imageWidth": 2736,\n "id": 3113318,\n "user_id": 7410713,\n "views": 342627,\n "comments": 113,\n "pageURL": "https://pixabay.com/en/sunflower-nature-flora-flower-3113318/",\n "imageHeight": 1824,\n "webformatURL": "https://pixabay.com/get/ea34b00c2bf5093ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_640.jpg",\n "type": "photo",\n "previewHeight": 99,\n "tags": "sunflower, nature, flora",\n "downloads": 242156,\n "user": "bichnguyenvo",\n "favorites": 454,\n "imageSize": 1026006,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2017/12/16/10-28-39-199_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2018/01/28/11/24/sunflower-3113318_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/ea37b80d21f7033ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_1280.jpg",\n "webformatHeight": 400,\n "webformatWidth": 640,\n "likes": 434,\n "imageWidth": 3200,\n "id": 3292932,\n "user_id": 2216431,\n "views": 184738,\n "comments": 34,\n "pageURL": "https://pixabay.com/en/sunflower-vase-vintage-retro-wall-3292932/",\n "imageHeight": 2000,\n "webformatURL": "https://pixabay.com/get/ea37b80d21f7033ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_640.jpg",\n "type": "photo",\n "previewHeight": 93,\n "tags": "sunflower, vase, vintage",\n "downloads": 146666,\n "user": "Yuri_B",\n "favorites": 593,\n "imageSize": 2563708,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2018/01/15/10-52-15-382_250x250.png",\n "previewURL": "https://cdn.pixabay.com/photo/2018/04/05/14/09/sun-flower-3292932_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/eb37b80a2cf7053ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_1280.jpg",\n "webformatHeight": 426,\n "webformatWidth": 640,\n "likes": 486,\n "imageWidth": 5363,\n "id": 2295434,\n "user_id": 334088,\n "views": 54291,\n "comments": 33,\n "pageURL": "https://pixabay.com/en/spring-bird-bird-tit-spring-blue-2295434/",\n "imageHeight": 3575,\n "webformatURL": "https://pixabay.com/get/eb37b80a2cf7053ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_640.jpg",\n "type": "photo",\n "previewHeight": 99,\n "tags": "spring bird, bird, tit",\n "downloads": 25018,\n "user": "jill111",\n "favorites": 548,\n "imageSize": 2938651,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2018/06/27/01-23-02-27_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2017/05/08/13/15/spring-bird-2295434_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/ee34b40a2cf41c22d2524518b74d469fe576e0d010ac104491f4c47aaeeeb5bf_1280.jpg",\n "webformatHeight": 360,\n "webformatWidth": 640,\n "likes": 258,\n "imageWidth": 3020,\n "id": 715540,\n "user_id": 916237,\n "views": 82194,\n "comments": 31,\n "pageURL": "https://pixabay.com/en/yellow-natural-flower-blossom-715540/",\n "imageHeight": 1703,\n "webformatURL": "https://pixabay.com/get/ee34b40a2cf41c22d2524518b74d469fe576e0d010ac104491f4c47aaeeeb5bf_640.jpg",\n "type": "photo",\n "previewHeight": 84,\n "tags": "yellow, natural, flower",\n "downloads": 39827,\n "user": "Wow_Pho",\n "favorites": 256,\n "imageSize": 974940,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2015/04/07/14-10-15-590_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2015/04/10/00/41/yellow-715540_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/ea37b00a29fc093ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_1280.jpg",\n "webformatHeight": 358,\n "webformatWidth": 640,\n "likes": 336,\n "imageWidth": 2027,\n "id": 3215188,\n "user_id": 7097598,\n "views": 135865,\n "comments": 94,\n "pageURL": "https://pixabay.com/en/flowers-orange-orange-petals-3215188/",\n "imageHeight": 1134,\n "webformatURL": "https://pixabay.com/get/ea37b00a29fc093ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_640.jpg",\n "type": "photo",\n "previewHeight": 83,\n "tags": "flowers, orange, orange petals",\n "downloads": 93385,\n "user": "Candiix",\n "favorites": 274,\n "imageSize": 399066,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2017/12/06/20-08-45-84_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2018/03/10/20/26/flowers-3215188_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/e830b20928fc093ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_1280.jpg",\n "webformatHeight": 419,\n "webformatWidth": 640,\n "likes": 235,\n "imageWidth": 4896,\n "id": 1536088,\n "user_id": 1195798,\n "views": 268764,\n "comments": 53,\n "pageURL": "https://pixabay.com/en/sunflower-flower-bloom-yellow-1536088/",\n "imageHeight": 3208,\n "webformatURL": "https://pixabay.com/get/e830b20928fc093ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_640.jpg",\n "type": "photo",\n "previewHeight": 98,\n "tags": "sunflower, flower, bloom",\n "downloads": 40996,\n "user": "Couleur",\n "favorites": 203,\n "imageSize": 5103399,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2018/09/29/00-20-33-645_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2016/07/23/00/12/sun-flower-1536088_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/eb34b50a2df7083ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_1280.jpg",\n "webformatHeight": 390,\n "webformatWidth": 640,\n "likes": 306,\n "imageWidth": 4000,\n "id": 2145539,\n "user_id": 2364555,\n "views": 36019,\n "comments": 27,\n "pageURL": "https://pixabay.com/en/crocus-flower-wet-spring-2145539/",\n "imageHeight": 2443,\n "webformatURL": "https://pixabay.com/get/eb34b50a2df7083ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_640.jpg",\n "type": "photo",\n "previewHeight": 91,\n "tags": "crocus, flower, wet",\n "downloads": 20750,\n "user": "pixel2013",\n "favorites": 286,\n "imageSize": 823922,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2018/02/25/16-46-24-974_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2017/03/15/09/00/crocus-2145539_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/ec33b50e2ce90021d85a5854e74c4f90e275e7dc04b0144591f5c270a4edb2_1280.jpg",\n "webformatHeight": 428,\n "webformatWidth": 640,\n "likes": 436,\n "imageWidth": 3872,\n "id": 56414,\n "user_id": 9003,\n "views": 57529,\n "comments": 75,\n "pageURL": "https://pixabay.com/en/anemone-flower-blossom-bloom-blue-56414/",\n "imageHeight": 2592,\n "webformatURL": "https://pixabay.com/get/ec33b50e2ce90021d85a5854e74c4f90e275e7dc04b0144591f5c270a4edb2_640.jpg",\n "type": "photo",\n "previewHeight": 100,\n "tags": "anemone, flower, blossom",\n "downloads": 20907,\n "user": "Albenheim",\n "favorites": 364,\n "imageSize": 770723,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2012/09/08/21-14-56-990_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2012/09/08/21/51/anemone-56414_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/e830b00d20f5023ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_1280.jpg",\n "webformatHeight": 323,\n "webformatWidth": 640,\n "likes": 211,\n "imageWidth": 3861,\n "id": 1512813,\n "user_id": 2364555,\n "views": 63538,\n "comments": 22,\n "pageURL": "https://pixabay.com/en/lily-flowers-early-flower-garden-1512813/",\n "imageHeight": 1952,\n "webformatURL": "https://pixabay.com/get/e830b00d20f5023ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_640.jpg",\n "type": "photo",\n "previewHeight": 75,\n "tags": "lily, flowers, early",\n "downloads": 31782,\n "user": "pixel2013",\n "favorites": 209,\n "imageSize": 1037708,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2018/02/25/16-46-24-974_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2016/07/12/18/54/lily-1512813_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/ee37b80a29f11c22d2524518b74d469fe576e0d010ac104491f4c47aaeeeb5bf_1280.jpg",\n "webformatHeight": 416,\n "webformatWidth": 640,\n "likes": 269,\n "imageWidth": 1980,\n "id": 729515,\n "user_id": 909086,\n "views": 33664,\n "comments": 17,\n "pageURL": "https://pixabay.com/en/flower-beautiful-bloom-blooming-729515/",\n "imageHeight": 1288,\n "webformatURL": "https://pixabay.com/get/ee37b80a29f11c22d2524518b74d469fe576e0d010ac104491f4c47aaeeeb5bf_640.jpg",\n "type": "photo",\n "previewHeight": 97,\n "tags": "flower, beautiful, bloom",\n "downloads": 21810,\n "user": "Bess-Hamiti",\n "favorites": 348,\n "imageSize": 370390,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2017/09/19/10-02-47-777_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2015/04/19/08/33/flower-729515_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/e83cb60d2cf5003ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_1280.jpg",\n "webformatHeight": 372,\n "webformatWidth": 640,\n "likes": 247,\n "imageWidth": 4288,\n "id": 1972411,\n "user_id": 1777190,\n "views": 84036,\n "comments": 29,\n "pageURL": "https://pixabay.com/en/drip-blossom-bloom-yellow-1972411/",\n "imageHeight": 2499,\n "webformatURL": "https://pixabay.com/get/e83cb60d2cf5003ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_640.jpg",\n "type": "photo",\n "previewHeight": 87,\n "tags": "drip, blossom, bloom",\n "downloads": 71846,\n "user": "susannp4",\n "favorites": 244,\n "imageSize": 1510459,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2015/12/16/17-56-55-832_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2017/01/11/17/27/drip-1972411_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/e834b30829f3053ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_1280.jpg",\n "webformatHeight": 426,\n "webformatWidth": 640,\n "likes": 338,\n "imageWidth": 4752,\n "id": 1127174,\n "user_id": 1445608,\n "views": 93274,\n "comments": 24,\n "pageURL": "https://pixabay.com/en/sunflower-summer-yellow-nature-1127174/",\n "imageHeight": 3168,\n "webformatURL": "https://pixabay.com/get/e834b30829f3053ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_640.jpg",\n "type": "photo",\n "previewHeight": 99,\n "tags": "sunflower, summer, yellow",\n "downloads": 55774,\n "user": "mploscar",\n "favorites": 341,\n "imageSize": 3922163,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2016/01/05/14-08-20-943_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2016/01/08/05/24/sunflower-1127174_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/e834b2082bf11c22d2524518b74d469fe576e0d010ac104491f4c47aaeeeb5bf_1280.jpg",\n "webformatHeight": 355,\n "webformatWidth": 640,\n "likes": 167,\n "imageWidth": 2410,\n "id": 113735,\n "user_id": 817,\n "views": 91032,\n "comments": 29,\n "pageURL": "https://pixabay.com/en/rose-flower-yellow-yellow-rose-113735/",\n "imageHeight": 1337,\n "webformatURL": "https://pixabay.com/get/e834b2082bf11c22d2524518b74d469fe576e0d010ac104491f4c47aaeeeb5bf_640.jpg",\n "type": "photo",\n "previewHeight": 83,\n "tags": "rose, flower, yellow",\n "downloads": 13679,\n "user": "blizniak",\n "favorites": 152,\n "imageSize": 299425,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2013/06/28/17-07-05-714_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2013/05/26/12/14/rose-113735_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/e836b00629f5053ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_1280.jpg",\n "webformatHeight": 426,\n "webformatWidth": 640,\n "likes": 249,\n "imageWidth": 4272,\n "id": 1319114,\n "user_id": 485024,\n "views": 87475,\n "comments": 24,\n "pageURL": "https://pixabay.com/en/girl-flowers-yellow-beauty-nature-1319114/",\n "imageHeight": 2848,\n "webformatURL": "https://pixabay.com/get/e836b00629f5053ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_640.jpg",\n "type": "photo",\n "previewHeight": 99,\n "tags": "girl, flowers, yellow",\n "downloads": 41303,\n "user": "AdinaVoicu",\n "favorites": 263,\n "imageSize": 3837334,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2018/12/07/21-49-54-663_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2016/04/09/23/10/girl-1319114_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/ea32b30f2bfc023ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_1280.jpg",\n "webformatHeight": 426,\n "webformatWidth": 640,\n "likes": 108,\n "imageWidth": 6000,\n "id": 3720383,\n "user_id": 6246704,\n "views": 16075,\n "comments": 32,\n "pageURL": "https://pixabay.com/en/flower-g%C3%A9rbel-yellow-flower-flower-3720383/",\n "imageHeight": 4000,\n "webformatURL": "https://pixabay.com/get/ea32b30f2bfc023ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_640.jpg",\n "type": "photo",\n "previewHeight": 99,\n "tags": "flower g\xc3\xa9rbel, yellow flower, flower",\n "downloads": 9864,\n "user": "fernandozhiminaicela",\n "favorites": 81,\n "imageSize": 2117262,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2018/06/04/17-13-01-772_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2018/10/03/03/42/flower-gerbel-3720383_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/ea35b40f28f3073ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_1280.jpg",\n "webformatHeight": 426,\n "webformatWidth": 640,\n "likes": 285,\n "imageWidth": 5472,\n "id": 3050076,\n "user_id": 6663646,\n "views": 131773,\n "comments": 28,\n "pageURL": "https://pixabay.com/en/portrait-girl-fog-flowers-beauty-3050076/",\n "imageHeight": 3648,\n "webformatURL": "https://pixabay.com/get/ea35b40f28f3073ed1584d05fb1d4796ea71e3d71cb80c4090f4c57ca4e4b6b8df_640.jpg",\n "type": "photo",\n "previewHeight": 99,\n "tags": "portrait, girl, fog",\n "downloads": 92671,\n "user": "ThuyHaBich",\n "favorites": 283,\n "imageSize": 2914111,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2017/11/17/08-35-57-188_250x250.jpg",\n "previewURL": "https://cdn.pixabay.com/photo/2017/12/30/13/25/portrait-3050076_150.jpg"\n },\n {\n "largeImageURL": "https://pixabay.com/get/ec37b20a20e90021d85a5854e74c4f90e275e7dc04b0144591f5c270a4edb2_1280.jpg",\n "webformatHeight": 360,\n "webformatWidth": 640,\n "likes": 179,\n "imageWidth": 1920,\n "id": 52358,\n "user_id": 5783,\n "views": 28923,\n "comments": 20,\n "pageURL": "https://pixabay.com/en/flower-wild-flower-nature-52358/",\n "imageHeight": 1080,\n "webformatURL": "https://pixabay.com/get/ec37b20a20e90021d85a5854e74c4f90e275e7dc04b0144591f5c270a4edb2_640.jpg",\n "type": "photo",\n "previewHeight": 84,\n "tags": "flower, wild flower, nature",\n "downloads": 10460,\n "user": "PeterDargatz",\n "favorites": 154,\n "imageSize": 172383,\n "previewWidth": 150,\n "userImageURL": "https://cdn.pixabay.com/user/2012/06/22/22-42-41-494_250x250.jpg",\n "p
sax*_*av 5
您将获得一个带有键的 JSON 对象：
在上面的三个键中，https的值是另一个JSON数组，里面有很多json对象。你可以通过以下方式获取该对象
let respDict = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.allowFragments) as! [String:Any]
let httpDictArray = respDict["hits"] as! [Any]
for dictionary in httpDictArray{
if let dict = dictionary as? [String:Any]
{
let webFormatUrl = dict["webformatURL"] as! String
let tags = dict["tags"] as! String
}
}
这里的标签是一个字符串，它是由逗号分隔的许多单词的串联。因此，从标签字符串中，您可以获取标签数组，如下所示
let tagArray = tags.components(separatedBy: ", ")
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