你如何解析JSON在迅速？

Question

我有这个json文件的国家，我想解析使用关键字国家。请帮忙，因为我是新手，我真的很想了解更多。谢谢。

[ 
    {"country":"Afghanistan","code":"AF"},{"country":"\u00c5land Islands","code":"AX"}, 
    {"country":"Albania","code":"AL"}, 
    {"country":"Algeria","code":"DZ"}, 
    {"country":"American Samoa","code":"AS"}, 
    {"country":"AndorrA","code":"AD"}, 
    {"country":"Angola","code":"AO"}, 
    {"country":"Anguilla","code":"AI"}, 
    {"country":"Antarctica","code":"AQ"}, 
    {"country":"Antigua and Barbuda","code":"AG"}, 
    {"country":"Argentina","code":"AR"}, 
    {"country":"Armenia","code":"AM"}, 
    {"country":"Aruba","code":"AW"}, 
    {"country":"Australia","code":"AU"}, 
    {"country":"Austria","code":"AT"}, 
    {"country":"Azerbaijan","code":"AZ"}, 
    {"country":"Bahamas","code":"BS"}, 
    {"country":"Bahrain","code":"BH"}, 
    {"country":"Bangladesh","code":"BD"}, 
    {"country":"Barbados","code":"BB"}, 
    {"country":"Belarus","code":"BY"}, 
    {"country":"Belgium","code":"BE"}, 
    {"country":"Belize","code":"BZ"}, 
    {"country":"Benin","code":"BJ"}, 
    {"country":"Bermuda","code":"BM"}, 
    {"country":"Bhutan","code":"BT"}, 
    {"country":"Bolivia","code":"BO"}, 
    {"country":"Bosnia and Herzegovina","code":"BA"}, 
    {"country":"Botswana","code":"BW"}, 
    {"country":"Bouvet Island","code":"BV"}, 
    {"country":"Brazil","code":"BR"}, 
    {"country":"British Indian Ocean Territory","code":"IO"}, 
    {"country":"Brunei Darussalam","code":"BN"}, 
    {"country":"Bulgaria","code":"BG"}, 
    {"country":"Burkina Faso","code":"BF"}, 
    {"country":"Burundi","code":"BI"}, 
    {"country":"Cambodia","code":"KH"}, 
    {"country":"Cameroon","code":"CM"}, 
    {"country":"Canada","code":"CA"}, 
    {"country":"Cape Verde","code":"CV"}, 
    {"country":"Cayman Islands","code":"KY"}, 
    {"country":"Central African Republic","code":"CF"},{"country":"Chad","code":"TD"}, 
    {"country":"Chile","code":"CL"}, 
    {"country":"China","code":"CN"}, 
    {"country":"Christmas Island","code":"CX"}, 
    {"country":"Cocos (Keeling) Islands","code":"CC"},{"country":"Colombia","code":"CO"}, 
    {"country":"Comoros","code":"KM"}, 
    {"country":"Congo","code":"CG"}, 
    {"country":"Congo, The Democratic Republic of the","code":"CD"}, 
    {"country":"Cook Islands","code":"CK"}, 
    {"country":"Costa Rica","code":"CR"}, 
    {"country":"Cote D\"Ivoire","code":"CI"}, 
    {"country":"Croatia","code":"HR"}, 
    {"country":"Cuba","code":"CU"}, 
    {"country":"Cyprus","code":"CY"}, 
    {"country":"Czech Republic","code":"CZ"}, 
    {"country":"Denmark","code":"DK"}, 
    {"country":"Djibouti","code":"DJ"}, 
    {"country":"Dominica","code":"DM"}, 
    {"country":"Dominican Republic","code":"DO"}, 
    {"country":"Ecuador","code":"EC"}, 
    {"country":"Egypt","code":"EG"}, 
    {"country":"El Salvador","code":"SV"}, 
    {"country":"Equatorial Guinea","code":"GQ"},{"country":"Eritrea","code":"ER"},{"country":"Estonia","code":"EE"},{"country":"Ethiopia","code":"ET"},{"country":"Falkland Islands (Malvinas)","code":"FK"},{"country":"Faroe Islands","code":"FO"},{"country":"Fiji","code":"FJ"},{"country":"Finland","code":"FI"},{"country":"France","code":"FR"},{"country":"French Guiana","code":"GF"},{"country":"French Polynesia","code":"PF"},{"country":"French Southern Territories","code":"TF"},{"country":"Gabon","code":"GA"},{"country":"Gambia","code":"GM"},{"country":"Georgia","code":"GE"},{"country":"Germany","code":"DE"},{"country":"Ghana","code":"GH"},{"country":"Gibraltar","code":"GI"},{"country":"Greece","code":"GR"},{"country":"Greenland","code":"GL"},{"country":"Grenada","code":"GD"},{"country":"Guadeloupe","code":"GP"},{"country":"Guam","code":"GU"},{"country":"Guatemala","code":"GT"},{"country":"Guernsey","code":"GG"},{"country":"Guinea","code":"GN"},{"country":"Guinea-Bissau","code":"GW"},{"country":"Guyana","code":"GY"},{"country":"Haiti","code":"HT"},{"country":"Heard Island and Mcdonald Islands","code":"HM"},{"country":"Holy See (Vatican City State)","code":"VA"},{"country":"Honduras","code":"HN"},{"country":"Hong Kong","code":"HK"},{"country":"Hungary","code":"HU"},{"country":"Iceland","code":"IS"},{"country":"India","code":"IN"},{"country":"Indonesia","code":"ID"},{"country":"Iran, Islamic Republic Of","code":"IR"},{"country":"Iraq","code":"IQ"},{"country":"Ireland","code":"IE"},{"country":"Isle of Man","code":"IM"},{"country":"Israel","code":"IL"},{"country":"Italy","code":"IT"},{"country":"Jamaica","code":"JM"},{"country":"Japan","code":"JP"},{"country":"Jersey","code":"JE"},{"country":"Jordan","code":"JO"},{"country":"Kazakhstan","code":"KZ"},{"country":"Kenya","code":"KE"},{"country":"Kiribati","code":"KI"},{"country":"Korea, Democratic People\"S Republic of","code":"KP"},{"country":"Korea, Republic of","code":"KR"},{"country":"Kuwait","code":"KW"},{"country":"Kyrgyzstan","code":"KG"},{"country":"Lao People\"S Democratic Republic","code":"LA"},{"country":"Latvia","code":"LV"},{"country":"Lebanon","code":"LB"},{"country":"Lesotho","code":"LS"},{"country":"Liberia","code":"LR"},{"country":"Libyan Arab Jamahiriya","code":"LY"},{"country":"Liechtenstein","code":"LI"},{"country":"Lithuania","code":"LT"},{"country":"Luxembourg","code":"LU"},{"country":"Macao","code":"MO"},{"country":"Macedonia, The Former Yugoslav Republic of","code":"MK"},{"country":"Madagascar","code":"MG"},{"country":"Malawi","code":"MW"},{"country":"Malaysia","code":"MY"},{"country":"Maldives","code":"MV"},{"country":"Mali","code":"ML"},{"country":"Malta","code":"MT"},{"country":"Marshall Islands","code":"MH"},{"country":"Martinique","code":"MQ"},{"country":"Mauritania","code":"MR"},{"country":"Mauritius","code":"MU"},{"country":"Mayotte","code":"YT"},{"country":"Mexico","code":"MX"},{"country":"Micronesia, Federated States of","code":"FM"},{"country":"Moldova, Republic of","code":"MD"},{"country":"Monaco","code":"MC"},{"country":"Mongolia","code":"MN"},{"country":"Montserrat","code":"MS"},{"country":"Morocco","code":"MA"},{"country":"Mozambique","code":"MZ"},{"country":"Myanmar","code":"MM"},{"country":"Namibia","code":"NA"},{"country":"Nauru","code":"NR"},{"country":"Nepal","code":"NP"},{"country":"Netherlands","code":"NL"},{"country":"Netherlands Antilles","code":"AN"},{"country":"New Caledonia","code":"NC"},{"country":"New Zealand","code":"NZ"},{"country":"Nicaragua","code":"NI"},{"country":"Niger","code":"NE"},{"country":"Nigeria","code":"NG"},{"country":"Niue","code":"NU"},{"country":"Norfolk Island","code":"NF"},{"country":"Northern Mariana Islands","code":"MP"},{"country":"Norway","code":"NO"},{"country":"Oman","code":"OM"},{"country":"Pakistan","code":"PK"},{"country":"Palau","code":"PW"},{"country":"Palestinian Territory, Occupied","code":"PS"},{"country":"Panama","code":"PA"},{"country":"Papua New Guinea","code":"PG"},{"country":"Paraguay","code":"PY"},{"country":"Peru","code":"PE"},{"country":"Philippines","code":"PH"},{"country":"Pitcairn","code":"PN"},{"country":"Poland","code":"PL"},{"country":"Portugal","code":"PT"},{"country":"Puerto Rico","code":"PR"},{"country":"Qatar","code":"QA"},{"country":"Reunion","code":"RE"},{"country":"Romania","code":"RO"},{"country":"Russian Federation","code":"RU"},{"country":"RWANDA","code":"RW"},{"country":"Saint Helena","code":"SH"},{"country":"Saint Kitts and Nevis","code":"KN"},{"country":"Saint Lucia","code":"LC"},{"country":"Saint Pierre and Miquelon","code":"PM"},{"country":"Saint Vincent and the Grenadines","code":"VC"},{"country":"Samoa","code":"WS"},{"country":"San Marino","code":"SM"},{"country":"Sao Tome and Principe","code":"ST"},{"country":"Saudi Arabia","code":"SA"},{"country":"Senegal","code":"SN"},{"country":"Serbia and Montenegro","code":"CS"},{"country":"Seychelles","code":"SC"},{"country":"Sierra Leone","code":"SL"},{"country":"Singapore","code":"SG"},{"country":"Slovakia","code":"SK"},{"country":"Slovenia","code":"SI"},{"country":"Solomon Islands","code":"SB"},{"country":"Somalia","code":"SO"},{"country":"South Africa","code":"ZA"},{"country":"South Georgia and the South Sandwich Islands","code":"GS"},{"country":"Spain","code":"ES"},{"country":"Sri Lanka","code":"LK"},{"country":"Sudan","code":"SD"},{"country":"Suriname","code":"SR"},{"country":"Svalbard and Jan Mayen","code":"SJ"},{"country":"Swaziland","code":"SZ"},{"country":"Sweden","code":"SE"},{"country":"Switzerland","code":"CH"},{"country":"Syrian Arab Republic","code":"SY"},{"country":"Taiwan","code":"TW"},{"country":"Tajikistan","code":"TJ"},{"country":"Tanzania, United Republic of","code":"TZ"},{"country":"Thailand","code":"TH"},{"country":"Timor-Leste","code":"TL"},{"country":"Togo","code":"TG"},{"country":"Tokelau","code":"TK"},{"country":"Tonga","code":"TO"},{"country":"Trinidad and Tobago","code":"TT"},{"country":"Tunisia","code":"TN"},{"country":"Turkey","code":"TR"},{"country":"Turkmenistan","code":"TM"},{"country":"Turks and Caicos Islands","code":"TC"},{"country":"Tuvalu","code":"TV"},{"country":"Uganda","code":"UG"},{"country":"Ukraine","code":"UA"},{"country":"United Arab Emirates","code":"AE"},{"country":"United Kingdom","code":"GB"},{"country":"United States","code":"US"},{"country":"United States Minor Outlying Islands","code":"UM"},{"country":"Uruguay","code":"UY"},{"country":"Uzbekistan","code":"UZ"},{"country":"Vanuatu","code":"VU"},{"country":"Venezuela","code":"VE"},{"country":"Viet Nam","code":"VN"},{"country":"Virgin Islands, British","code":"VG"},{"country":"Virgin Islands, U.S.","code":"VI"}, 
    {"country":"Wallis and Futuna","code":"WF"}, 
    {"country":"Western Sahara","code":"EH"}, 
    {"country":"Yemen","code":"YE"},{"country":"Zambia","code":"ZM"}, 
    {"country":"Zimbabwe","code":"ZW"} 
] 

Answer 1

JSON字符串是包含类型的字典阵列[String:String]

• 获取字符串的NSData表示

  let data = jsonString.dataUsingEncoding(NSUTF8StringEncoding)! 
  

• 数据反序列化到斯威夫特阵列

  let json = try! NSJSONSerialization.JSONObjectWithData(data, options: []) as! [[String:String]] 
  

• 使用map功能

  let countries = json.map{ $0["country"]! } 
  

如果从您需要添加网络接收到的字符串得到所有国家的价值观适当的错误处理

if let data = jsonString.dataUsingEncoding(NSUTF8StringEncoding) { 
    do { 
    let json = try NSJSONSerialization.JSONObjectWithData(data, options: []) as! [[String:String]] 
    let countries = json.map{ $0["country"]! } 
    } catch let error as NSError { 
    print(error) 
    } 
} 

Answer 2

使用NSJSONSerialization

if let data = yourJSONString.dataUsingEncoding(NSUTF8StringEncoding) { 
    let json = try? NSJSONSerialization.JSONObjectWithData(data, options: .AllowFragments) 
    print(json) 
}