在Swift中从JSON获取第一个元素Google Translate

问题描述

我无法从Google Translate生成的JSON获取第一个元素（包含翻译）。我试图以各种方式做到这一点，例如将JSON转换为数组并使用JSONSerialization，但我一直无法弄清楚。尽管此网站上存在类似的问题，但没有答案适合我。

作为示例，这是生成“您好，我想获得帮助”的英语到西班牙语翻译的内容。

let toLanguage = "es"
let textToTranslate = "Hello there,I would love some help".addingPercentEncoding(withAllowedCharacters: .urlHostAllowed)
let translateURL = "https://translate.googleapis.com/translate_a/single?client=gtx&sl=en&tl=" + toLanguage + "&dt=t&dt=t&q=" + textToTranslate!
        let url = URL(string: translateURL)!
        let task = URLSession.shared.dataTask(with: url) { data,response,error in
            print(String(data: data!,encoding: .utf8))
        }
        task.resume()

该打印语句返回：

("[[[\"Hola,me encantaría un poco de ayuda\",\"Hello there,I would love some help\",null,3,[[]\n]\n,[[[\"88050b4eeda80a4gb03h2aa140d8a487\",\"en_es_2020q2.md\"]\n]\n]\n]\n]\n,\"en\",[]\n]\n")

我想将“ Hola，meencantaríaun poco de ayuda”存储为字符串，任何指导将不胜感激！预先谢谢你。

解决方法

这是一个丑陋的解决方案，可以用

替换闭包的内容。

if let data = data {
    var reply: [Any] = []
    do {
        reply = try JSONSerialization.jsonObject(with: data) as? [Any] ?? []
    } catch {
        print(error)
    }
    if let next = reply.first as? [Any] {
        if let next = next.first as? [Any] {
            if let translation = next.first as? String {
                print(translation)
            }
        }
    }
}

您可以将所有内容包装到这样的函数中

func translate(_ phrase: String,to toLanguage: String,completion: @escaping (String?) -> ()) {
    guard let textToTranslate = phrase.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed),let url = URL(string: "https://translate.googleapis.com/translate_a/single?client=gtx&sl=en&tl=" + toLanguage + "&dt=t&dt=t&q=" + textToTranslate) else {
            completion(nil)
            return
    }

    let task = URLSession.shared.dataTask(with: url) { data,response,error in
        if let data = data {
            var reply: [Any] = []
            do {
                reply = try JSONSerialization.jsonObject(with: data) as? [Any] ?? []
            } catch {
                print(error)
                completion(nil)
            }
            if let next = reply.first as? [Any] {
                if let next = next.first as? [Any] {
                    if let translation = next.first as? String {
                        completion(translation)
                    }
                }
            }
        }
    }
    task.resume()
}

以闭包调用

translate("Hello there,I would love some help",to: "es",completion: {
    if let reply = $0 {
        print(reply)
    } else {
        print("Translation failed")
    }
})