Question

我是REST API的新手，遇到了一些麻烦。我正在尝试从嵌套在字典中的数组调用数据。虽然我已经能够从其他变量中提取数据，但这给了我一些问题。作为参考，我需要的URL在“sprites”数组中标记为“front default”。此外，URL是图像的URL，我使用Alamofire图像来显示图像。我将包含我迄今使用的代码来调用其他变量，以及API结构的屏幕截图。

Screenshot of API hierarchy

import Foundation
import Alamofire
import AlamofireImage
import SwiftyJSON
import Siesta

class PokeInfo {
var name: String
var id: Int
var abilities: [String]
var types: [String]




// converts dictionary into string
init?(jsonDictionary: [String: Any]) {
    //guard used to check if value entered in search bar matches a name in API data
    guard let name = jsonDictionary["name"] as? String,

        let id = jsonDictionary["id"] as? Int,
        //abilities data nested. First must be set to string
        let abilities = jsonDictionary["abilities"] as? [[String: Any]],
    let types = jsonDictionary["types"] as? [[String: Any]]
    else {
            return nil
    };


    var abilityNames: [String] = []
     var typeNames: [String] = []


    //targets nested data, going inside dictionary to find attributes of that element
    for abilityDictionary in abilities {

        guard let ability = abilityDictionary["ability"] as? [String: Any], let name = ability["name"] as? String else { break }

        abilityNames.append(name)
    };
    for typeDictionary in types {

        guard let type = typeDictionary["type"] as? [String: Any], let name = type["name"] as? String else { break }

        typeNames.append(name)
    }


    self.name = name
    self.id = id
    self.abilities = abilityNames
    self.types = typeNames


}

}

Answer 1

从Swift 4开始，你应该使用Codable作为JSON，现在是语言的一部分。这是一个游乐场的例子：

db.collection.findOne().sort({$natural:-1}).limit(1);

输出是：

import PlaygroundSupport
import UIKit

class PokeInfo: Codable {
    var name: String
    var id: Int
    var abilities: [String]
    var types: [String]
}

let pokeString = """
{
"name": "test",
"id": 1,
"abilities": ["a", "b", "c"],
"types": ["x", "y", "z"]
}
"""
let pokeData = pokeString.data(using: .utf8)!

let decoder = JSONDecoder()
let pokeInfo = try! decoder.decode(PokeInfo.self, from: pokeData)
print(pokeInfo.abilities)

如何在API嵌套数组中调用URL

1 个答案: