如何从包含 JSON 数据的字符串中获取 UIImage

Question

我正在尝试从APIOpenWeatherMap加载图标图像，并将其显示在ImageView中。我正在尝试将其加载到imageView"iconImage'中。我已经成功加载了位置和湿度的JSON数据，因为它们Strings，但 Icon 数据也是一个String，我无法让它显示为UIImage。

代码如下：

我的 JSON 结构如下：

struct Coordinate : Decodable {
let lat, lon : Double?
}
struct Weather : Decodable {
var id : Int?
var main, myDescription, icon : String?
enum CodingKeys : String, CodingKey {
case id = "id"
case main = "main"
case icon = "icon"
case myDescription = "description"
}
}
struct Sys : Decodable {
let type, id : Int?
let sunrise, sunset : Date?
let message : Double?
let country : String?
}
struct Main : Decodable {
let temp, tempMin, tempMax : Double?
let pressure, humidity : Int?
}
struct Wind : Decodable {
let speed : Double?
let deg : Int?
}
struct MyWeather : Decodable {
let coord : Coordinate?
let cod, visibility, id : Int?
let name : String?
let base : String?
let weather : [Weather]?
let sys : Sys?
let main : Main?
let wind : Wind?
let dt : Date?
}`enter code here`    

查看下面的控制器：

guard let APIUrl = URL(string: "https://api.openweathermap.org/data/2.5/weather?q=" + text +  "&appid=e7b2054dc37b1f464d912c00dd309595&units=Metric") else { return }
//API KEY
URLSession.shared.dataTask(with: APIUrl) { data, response, error in
guard let data = data else { return }

let decoder = JSONDecoder()
//Decoder
do {
if (self.iconImage != nil)
{
if let gicon = weatherData.weather?.first?.icon {
DispatchQueue.main.async {
self.iconImage.image! =  gicon
}
}
}
if (self.LocationLabel != nil)
{
if let gmain = weatherData.name {
print(gmain)
DispatchQueue.main.async {
self.LocationLabel.text! = "Current Weather in: " + String (gmain)
}
}
}

if (self.HumidityLabel != nil)
{
if let ghumidity = weatherData.main?.humidity
{
print(ghumidity, "THIS IS HUMIDITY")
DispatchQueue.main.async {
self.HumidityLabel.text! = String (ghumidity)
}
}
}

Answer 1

使用 翠鸟

它在图像视图中创建一个扩展。您将使用self.imageview.kf.setImage(with: "url")

Answer 2

图标是图片的id，需要将其附加到这个url并加载

http://openweathermap.org/img/w/10d.png//这里 ------ id = 10d

假设您将使用 SDWebImage ，然后执行此操作

let urlStr = "http://openweathermap.org/img/w/(gicon).png"
self.iconImage.sd_setImage(with: URL(string:urlStr), placeholderImage: UIImage(named: "placeholder.png"))

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