Swift调用RapidAPI时JSON解码模型不匹配错误求助

你遇到的解码错误是因为API返回的response字段是整数数组（比如[2015,2016,...]），但你定义的Model中response类型是[Response]?，而Response结构体期望解码字典（键值对），实际解析到的却是单个数字，类型不匹配导致报错。

直接修改Model结构，把response的类型改为[Int]?，不需要额外的Response结构体：

struct Model: Decodable {
    let results: Int?
    let response: [Int]?
}

解码后直接访问数组元素即可：

do {
    let info = try JSONDecoder().decode(Model.self, from: data)
    print(info.response?.first ?? 0) // 输出2015
} catch let error {
    print(error)
}

func apiCall(){
    guard let url = URL(string:"https://api-nba-v1.p.rapidapi.com/seasons") else {return}
    
    var request = URLRequest(url: url)
    let headers = [
        "X-RapidAPI-Key": "", // 填入你的RapidAPI Key
        "X-RapidAPI-Host": "api-nba-v1.p.rapidapi.com"
    ]
    request.httpMethod = "GET"
    request.allHTTPHeaderFields = headers
    
    URLSession.shared.dataTask(with: request) { data, response, error in
        if let error = error {
            print(error)
            return
        }
        
        guard let data = data, let response = response as? HTTPURLResponse, response.statusCode == 200 else {
            return
        }
        
        do {
            let info = try JSONDecoder().decode(Model.self, from: data)
            print(info.response?.first ?? 0)
        } catch let error {
            print(error)
        }
    }.resume()
}

struct Model: Decodable {
    let results: Int?
    let response: [Int]?
}

如果后续API返回的response结构变更（比如变为字典数组），再对应调整模型结构即可。当前API返回的response是纯整数数组，用[Int]类型匹配最直接。

内容的提问来源于stack exchange，提问作者forginSpell