我正在尝试从“ Main”和“ Description”表单中检索该值,但它未显示在UILabel中。所有其他参数显示良好。如“温度”和“最高和最低温度”风速和方向。我的天气图标也遇到困难,如果我的代码正确,则需要一些指导。
import UIKit
import Foundation
class ViewController: UIViewController {
var timer = Timer()
struct CurrentLocalWeather: Codable {
let base: String
let clouds: Clouds
let cod: Int
let coord: Coord
let dt: Int
let id: Int
let main: Main
let name: String
let sys: Sys
let visibility: Int
let weather: Weather
let wind: Wind
}
struct Clouds: Codable {
let all: Int
}
struct Coord: Codable {
let lat: Double
let lon: Double
}
struct Main: Codable {
let humidity: Int
let pressure: Int
let temp: Double
let tempMax: Double
let tempMin: Double
private enum CodingKeys: String, CodingKey {
case humidity, pressure, temp, tempMax = "temp_max", tempMin = "temp_min"
}
}
struct Sys: Codable {
let country: String
let id: Int
let message: Double
let sunrise: UInt64
let sunset: UInt64
let type: Int
}
struct Weather: Codable {
let description: String
let icon: String
let id: Int
let main: String
}
struct Wind: Codable {
let deg: Int
let speed: Double
}
//Variables from Storyboard
@IBOutlet weak var Temp: UILabel!
@IBOutlet weak var TempMin: UILabel!
@IBOutlet weak var TempMax: UILabel!
@IBOutlet weak var WindSpeed: UILabel!
@IBOutlet weak var Direction: UILabel!
@IBOutlet weak var Humidity: UILabel!
@IBOutlet weak var MainDesc: UILabel!
@IBOutlet weak var Description: UILabel!
@IBOutlet weak var City: UILabel!
@IBOutlet weak var SunRise: UILabel!
@IBOutlet weak var SunSet: UILabel!
@IBOutlet weak var Icon: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
// Define URL for Weather Data
URLSession.shared.dataTask(with: URL(string: "https://api.openweathermap.org/data/2.5/weather?lat=51.05011&lon=-114.08529&appid=<APPID_REMOVED_FOR_POSTING_PURPOSE>&units=metric")!) { data, response, error in
if let error = error {
print("Error:\n\(error)")
} else {
do {
let JSon = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as! [String: AnyObject]
if let Temp1 = JSon["weather"]as? NSDictionary {
DispatchQueue.main.async {
self.Description.text = Temp1["description"] as? String
self.MainDesc.text = Temp1["main"] as? String
let Ico = (Temp1["icon"] as? String)!
let Icon = UIImageView()
let urlStr = NSURL(string:"http://openweathermap.org/img/w/\(Ico).png")
let urlData = NSData(contentsOf: urlStr! as URL)
if urlData == nil {
Icon.image = UIImage(data: urlData! as Data)
}
}
}
} catch let jsonError as NSError {
print("JSON error:\n\(jsonError.description)")
}
}
}.resume()
}
这是查询的结果:
{“坐标”:{“ lon”:-114.09,“纬度”:51.05},“天气”:[{“ id”:802,“主”:“云”,“描述”:“散云” “,” icon“:” 03d“}],” base“:” stations“,” main“:{” temp“:10.9,” pressure“:1014,”湿度“:32,” temp_min“:8.89,” temp_max“:13.33},”可见性“:56326,” wind“:{” speed“:11.3,” deg“:20},” clouds“:{” all“:40},” dt“:1556142366,” sys “:{”类型“:1,” id“:989,”消息“:0.0068,”国家“:” CA“,”日出“:1556108578,”日落“:1556160342},” id“:5913490,”名称“:”卡尔加里“,”鳕鱼“:200}
答案 0 :(得分:0)
通过进行以下更改,我能够解决字符串值未显示的问题。
Import UIKit
import Foundation
class ViewController: UIViewController {
var timer = Timer()
//Variables from Storyboard
@IBOutlet weak var Temp: UILabel!
@IBOutlet weak var TempMin: UILabel!
@IBOutlet weak var TempMax: UILabel!
@IBOutlet weak var WindSpeed: UILabel!
@IBOutlet weak var Direction: UILabel!
@IBOutlet weak var Humidity: UILabel!
@IBOutlet weak var MainDesc: UILabel!
@IBOutlet weak var Description: UILabel!
@IBOutlet weak var City: UILabel!
@IBOutlet weak var SunRise: UILabel!
@IBOutlet weak var SunSet: UILabel!
@IBOutlet weak var Icon: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
// Define URL for Weather Data
URLSession.shared.dataTask(with: URL(string: "https://api.openweathermap.org/data/2.5/weather?lat=51.05011&lon=-114.08529&appid=<APPID_REMOVED_FOR_POSTING_PURPOSE>&units=metric")!) { data, response, error in
if let error = error {
print("Error:\n\(error)")
} else {
do {
let JSon = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as! [String: AnyObject]
let weatherData = (JSon["weather"]as! NSArray)
if let Temp1 = weatherData[0] as? NSDictionary {
DispatchQueue.main.async {
self.Description.text = Temp1["description"] as? String
self.MainDesc.text = Temp1["main"] as? String
let Ico = (Temp1["icon"] as? String)!
let urlStr = NSURL(string:"http://openweathermap.org/img/w/\(Ico).png")
let urlData = NSData(contentsOf: urlStr! as URL)
if urlData != nil {
self.Icon.image = UIImage(data: urlData! as Data)
}
}
}
} catch let jsonError as NSError {
print("JSON error:\n\(jsonError.description)")
}
}
}.resume()
}
我仍然希望图标能够正常工作,我也应该能够发布该图标。对于尝试使用Codable并正确使用它的人,请分享。
答案 1 :(得分:0)
使用Decodable
非常简单。
这些是省略不需要的键的结构
struct CurrentLocalWeather: Decodable {
let main: Main
let name: String
let sys: Sys
let weather: [Weather]
let wind: Wind
}
struct Main: Decodable {
let humidity: Int
let temp: Double
let tempMin, tempMax: Double
}
struct Sys: Decodable {
let sunrise: Date
let sunset: Date
}
struct Weather: Decodable {
let description: String
let icon: String
let main: String
}
struct Wind: Codable {
let speed: Double
let deg: Int
}
要获取图标,您需要执行第二个数据任务,同步检索数据是非常不好的做法。
不遵守区分大小写的命名约定也是非常不好的做法。
class ViewController: UIViewController {
var timer = Timer()
//Variables from Storyboard
@IBOutlet weak var temp: UILabel!
@IBOutlet weak var tempMin: UILabel!
@IBOutlet weak var tempMax: UILabel!
@IBOutlet weak var windSpeed: UILabel!
@IBOutlet weak var direction: UILabel!
@IBOutlet weak var humidity: UILabel!
@IBOutlet weak var mainDesc: UILabel!
@IBOutlet weak var desc: UILabel!
@IBOutlet weak var city: UILabel!
@IBOutlet weak var sunrise: UILabel!
@IBOutlet weak var sunset: UILabel!
@IBOutlet weak var icon: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
// Define URL for Weather Data
URLSession.shared.dataTask(with: URL(string: "https://api.openweathermap.org/data/2.5/weather?lat=51.05011&lon=-114.08529&appid=<APPID_REMOVED_FOR_POSTING_PURPOSE>&units=metric")!) { data, response, error in
guard let data = data else { print("Error:", error!); return }
do {
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
decoder.dateDecodingStrategy = .secondsSince1970
let result = try decoder.decode(CurrentLocalWeather.self, from: data)
guard let weather = result.weather.first else { return }
DispatchQueue.main.async {
self.desc.text = weather.description
self.mainDesc.text = weather.main
let icon = weather.icon
URLSession.shared.dataTask(with: URL(string: "http://openweathermap.org/img/w/\(icon).png")!) { iconData, _ , _ in
if let data = iconData {
DispatchQueue.main.async {
self.icon.image = UIImage(data: data)
}
}
}.resume()
}
} catch {
print("JSON error:", error)
}
}.resume()
}
}