如何在没有键的情况下解析JSON文件?
我已从以下url下载了JSON文件: 在将所有JSON文件解析为如何在没有键的情况下解析JSON文件?,json,swift,Json,Swift,我已从以下url下载了JSON文件: 在将所有JSON文件解析为let JSON let requestURL: NSURL = NSURL(string: "https://raw.githubusercontent.com/David-Haim/CountriesToCitiesJSON/master/countriesToCities.json")! let urlRequest: NSMutableURLRequest = NSMutableURLRequest(URL: re
let JSON
let requestURL: NSURL = NSURL(string: "https://raw.githubusercontent.com/David-Haim/CountriesToCitiesJSON/master/countriesToCities.json")!
let urlRequest: NSMutableURLRequest = NSMutableURLRequest(URL: requestURL)
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithRequest(urlRequest) {
(data, response, error) -> Void in
let httpResponse = response as! NSHTTPURLResponse
let statusCode = httpResponse.statusCode
if (statusCode == 200) {
do{
let json = try NSJSONSerialization.JSONObjectWithData(data!, options:.AllowFragments)
print (json)
}catch {
print("Error with Json: \(error)")
}
}
}
task.resume()
}
问题是我不能求助于每个国家和城市,因为我不知道关键->价值。我怎样才能找到每个国家和城市?在这篇回复中,您可以找到所有关于国家和城市的数据 您的响应是dictionary
[String:[String]]
类型
例如:
答复的一部分:
let json = ["Eritrea":["Asmara",""],"Cuba":["Havana","Habana","La Habana","Matanzas","Villa","Bayamo","Cienfuegos","Santiago de Cuba","HolguÃn","Ciego de Ãvila","Pinar del RÃo","Sancti SpÃritus","Camagüey","Las Tunas","Guantánamo","Varadero"],"Saint Helena":["Tristan Da Cunha","Jamestown"],"Christmas Island":["Flying Fish Cove"],"Ethiopia":["Addis Ababa","Awasa","Jijiga"],"British Indian Ocean Territory":[""]]
因此,如果要获取所有国家/地区的名称,请执行以下操作:
let keys = Array(json.keys)
let cityes = json["Eritrea"]
如果您想获取城市,例如厄立特里亚的城市,请执行以下操作:
let keys = Array(json.keys)
let cityes = json["Eritrea"]
在这篇回复中,您可以找到有关国家和城市的所有数据 您的响应是dictionary
[String:[String]]
类型
例如:
答复的一部分:
let json = ["Eritrea":["Asmara",""],"Cuba":["Havana","Habana","La Habana","Matanzas","Villa","Bayamo","Cienfuegos","Santiago de Cuba","HolguÃn","Ciego de Ãvila","Pinar del RÃo","Sancti SpÃritus","Camagüey","Las Tunas","Guantánamo","Varadero"],"Saint Helena":["Tristan Da Cunha","Jamestown"],"Christmas Island":["Flying Fish Cove"],"Ethiopia":["Addis Ababa","Awasa","Jijiga"],"British Indian Ocean Territory":[""]]
因此,如果要获取所有国家/地区的名称,请执行以下操作:
let keys = Array(json.keys)
let cityes = json["Eritrea"]
如果您想获取城市,例如厄立特里亚的城市,请执行以下操作:
let keys = Array(json.keys)
let cityes = json["Eritrea"]
下面是一些Swift操场代码,它完全符合您的要求:
//: Playground - noun: a place where people can play
import UIKit
import PlaygroundSupport
PlaygroundPage.current.needsIndefiniteExecution = true
let urlStr = "https://raw.githubusercontent.com/David-Haim/CountriesToCitiesJSON/master/countriesToCities.json"
let requestURL: URL = URL(string: urlStr)!
let urlRequest: URLRequest = URLRequest(url: requestURL)
let session = URLSession.shared
let task = session.dataTask(with: urlRequest) {
(data, response, error) -> Void in
let httpResponse = response as! HTTPURLResponse
let statusCode = httpResponse.statusCode
if (statusCode == 200) {
do{
let json:[String:[String]] = try! JSONSerialization.jsonObject(with: data!, options:.allowFragments) as! Dictionary
for (country, cities) in json {
print(country)
for city in cities {
print("City in \(country): \(city)")
}
}
}catch {
print("Error with Json: \(error)")
}
} else {
print("Other status: \(statusCode)")
}
}
task.resume()
它们的关键是知道数据的格式,在本例中是一个包含String
键和String
值数组的字典。声明json变量时,将其转换为实际值:
let json:[String:[String]] = try! JSONSerialization.jsonObject(with: data!, options:.allowFragments) as! Dictionary
下面是一些Swift操场代码,它完全符合您的要求:
//: Playground - noun: a place where people can play
import UIKit
import PlaygroundSupport
PlaygroundPage.current.needsIndefiniteExecution = true
let urlStr = "https://raw.githubusercontent.com/David-Haim/CountriesToCitiesJSON/master/countriesToCities.json"
let requestURL: URL = URL(string: urlStr)!
let urlRequest: URLRequest = URLRequest(url: requestURL)
let session = URLSession.shared
let task = session.dataTask(with: urlRequest) {
(data, response, error) -> Void in
let httpResponse = response as! HTTPURLResponse
let statusCode = httpResponse.statusCode
if (statusCode == 200) {
do{
let json:[String:[String]] = try! JSONSerialization.jsonObject(with: data!, options:.allowFragments) as! Dictionary
for (country, cities) in json {
print(country)
for city in cities {
print("City in \(country): \(city)")
}
}
}catch {
print("Error with Json: \(error)")
}
} else {
print("Other status: \(statusCode)")
}
}
task.resume()
它们的关键是知道数据的格式,在本例中是一个包含String
键和String
值数组的字典。声明json变量时,将其转换为实际值:
let json:[String:[String]] = try! JSONSerialization.jsonObject(with: data!, options:.allowFragments) as! Dictionary
可能重复查看在字典上迭代的Swift文档可能重复查看在字典上迭代的Swift文档其工作。非常感谢你。现在,我的作品清晰可见。非常感谢你。现在我明白了