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how do i get particular key value from string in swift4

Solutons:


It’s JSON array of dictionary you can get all the value of particular key by use map with array like below.

let arrayValues = mainArray.map{$0["District_NameEng"] as! String}
print (arrayValues)

Below is the sample code to parse your json string

// I've escaped the double quotes so that it can run, you don't need to do it because you already have the string
let responseStr = "[{"Loc_District":8119,"districtname":"अजमेर ","District_NameEng":"AJMER"},{"Loc_District":8104,"districtname":"अलवर ","District_NameEng":"ALWAR"},{"Loc_District":8125,"districtname":"बांसवाड़ा","District_NameEng":"BANSWARA"},{"Loc_District":8128,"districtname":"बारां ","District_NameEng":"BARAN"},{"Loc_District":8115,"districtname":"बाड़मेर ","District_NameEng":"BARMER"},{"Loc_District":8105,"districtname":"भरतपुर ","District_NameEng":"BHARATPUR"},{"Loc_District":8122,"districtname":"भीलवाडा ","District_NameEng":"BHILWARA"},{"Loc_District":8101,"districtname":"बीकानेर ","District_NameEng":"BIKANER"},{"Loc_District":8121,"districtname":"बून्दी ","District_NameEng":"BUNDI"},{"Loc_District":8126,"districtname":"चित्तौड़गढ़ ","District_NameEng":"CHITTORGARH"},{"Loc_District":8102,"districtname":"चूरू ","District_NameEng":"CHURU"},{"Loc_District":8109,"districtname":"दौसा ","District_NameEng":"DAUSA"},{"Loc_District":8106,"districtname":"धौलपुर ","District_NameEng":"DHOLPUR"},{"Loc_District":8124,"districtname":"डूंगरपुर ","District_NameEng":"DUNGARPUR"},{"Loc_District":8099,"districtname":"गंगानगर ","District_NameEng":"GANGANAGAR"},{"Loc_District":8100,"districtname":"हनुमानगढ ","District_NameEng":"HANUMANGARH"},{"Loc_District":8110,"districtname":"जयपुर ","District_NameEng":"JAIPUR"},{"Loc_District":8114,"districtname":"जैसलमेर ","District_NameEng":"JAISALMER"},{"Loc_District":8116,"districtname":"जालोर ","District_NameEng":"JALORE"},{"Loc_District":8129,"districtname":"झालावाड ","District_NameEng":"JHALAWAR"},{"Loc_District":8103,"districtname":"झुंझुंनु ","District_NameEng":"JHUNJHUNU"},{"Loc_District":8113,"districtname":"जोधपुर ","District_NameEng":"JODHPUR"},{"Loc_District":8107,"districtname":"करौली ","District_NameEng":"KAROULI"},{"Loc_District":8127,"districtname":"कोटा ","District_NameEng":"KOTA"},{"Loc_District":8112,"districtname":"नागौर ","District_NameEng":"NAGAUR"},{"Loc_District":8118,"districtname":"पाली ","District_NameEng":"PALI"},{"Loc_District":8131,"districtname":"प्रतापगढ ","District_NameEng":"PRATAPGARH"},{"Loc_District":8123,"districtname":"राजसमन्द ","District_NameEng":"RAJSAMAND"},{"Loc_District":8108,"districtname":"सवाई माधोपुर ","District_NameEng":"SAWAI MADHOPUR"},{"Loc_District":8111,"districtname":"सीकर ","District_NameEng":"SIKAR"},{"Loc_District":8117,"districtname":"सिरोही ","District_NameEng":"SIROHI"},{"Loc_District":8120,"districtname":"टोंक ","District_NameEng":"TONK"},{"Loc_District":8130,"districtname":"उदयपुर ","District_NameEng":"UDAIPUR"}]"


// Convert your response string to data or if you've data then pass it directly
let jsonData = responseStr.data(using: .utf8)

do {
  let json = try JSONSerialization.jsonObject(with: jsonData!, options: [])
  if let array = json as? [[String : AnyObject]] {
    for obj in array {
      let distName = obj["districtname"]
      print("(String(describing: distName!))")
    }
  }
}
catch {
  print("Couldn't parse json (error)")
}

To convert the json to array of dictionary.

let mainarray = jsondata as? [[String:Any]]

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