可在json中使用随机元素进行编码

你能告诉我如何使用Сodable解析这种json吗

{
"-MV_nbUZXH0YxpkMtdDK": {
    "log": "Installing dependencies",
    "ts": "2021-03-12T09:39:51.373513016Z"
},
"-MV_nbUeK8yJbrTkyhku": {
    "log": "Python version set to 2.7",
    "ts": "2021-03-12T09:39:51.376706383Z"
},
"-MV_nbnKj7ooihytbFb_": {
    "log": "Downloading and installing node v10.24.0...",
    "ts": "2021-03-12T09:39:52.640846883Z"
},
"-MV_nbr6_lCOgmASvjIx": {
    "log": "Downloading https://nodejs.org/dist/v10.24.0/node-v10.24.0-linux-x64.tar.xz...",
    "ts": "2021-03-12T09:39:52.882689552Z"
},
"-MV_nbx-xDFgKY5gt7LW": {
    "log": "Computing checksum with sha256sum",
    "ts": "2021-03-12T09:39:53.257948857Z"
},
"-MV_nbyq7zFzPKlZoUUW": {
    "log": "Checksums matched!",
    "ts": "2021-03-12T09:39:53.370929002Z"
},
"-MV_ncWPSrcJTxwRO-9Y": {
    "log": "Now using node v10.24.0 (npm v6.14.11)",
    "ts": "2021-03-12T09:39:55.588474395Z"
},
"-MV_ncXt4WBTobLQWtsP": {
    "log": "Started restoring cached build plugins",
    "ts": "2021-03-12T09:39:55.684040489Z"
}

我无法理解这些名字的模式

---

这是从Google收到的构建日志，我想在应用程序中显示它们。

我假设随机字符串的键不感兴趣，因此此解决方案只返回实际的日志记录

import Foundation
    
struct LogValue: Codable {
        let log, ts: String
}
    
typealias Logs = [String: LogValue]

let logs = try? JSONDecoder().decode(Logs, from: jsonData)

我选择使用自定义DateFormatter将时间戳转换为日期，但请注意，这有一个缺点，因为格式化程序只处理毫秒，因此会丢失一些精度，请参阅

下面是解码器如何配置以处理日期转换

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"

let decoder = JSONDecoder()
decoder.dateDecodingStrategy = .formatted(dateFormatter)

这里是解码，我只保留解码字典中的值

do {
    let logs = try decoder.decode([String: LogRecord].self, from: data).values
    for log in logs.sorted(by: { $0.timestamp < $1.timestamp }) {
        print("\(dateFormatter.string(from: log.timestamp)): \(log.log)")
    }
} catch {
    print(error)
}

输出

2021-03-12T10:39:51.373+0100:安装依赖项 2021-03-12T10:39:51.376+0100:Python版本设置为2.7 2021-03-12T10:39:52.640+0100:下载并安装节点v10.24.0。。。 2021-03-12T10:39:52.882+0100:下载nodejs.org/dist/v10.24.0/node-v10.24.0-linux-x64.tar.xz。。。 2021-03-12T10:39:53.257+0100：使用sha256sum计算校验和 2021-03-12T10:39:53.370+0100:校验和匹配！ 2021-03-12T10:39:55.588+0100:现在使用节点v10.24.0 npm v6.14.11 2021-03-12T10:39:55.684+0100:开始恢复缓存的生成插件

do {
    let logs = try decoder.decode([String: LogRecord].self, from: data).values
    for log in logs.sorted(by: { $0.timestamp < $1.timestamp }) {
        print("\(dateFormatter.string(from: log.timestamp)): \(log.log)")
    }
} catch {
    print(error)
}