UserDefaultにログを貯めるクラス

TestFlight経由でしか再現できないとか、デバッグ実行中に再現できないとか、そういうときにサクッとログを貯めて調べたいときに使うLogger

Lg.swift

class Lg {
    class func w(_ m: String) {
        func getNowClockString() -> String {
            let formatter = DateFormatter()
            formatter.dateFormat = "yyyy-MM-dd' 'HH:mm:ss"
            let now = Date()
            return formatter.string(from: now)
        }
        let log = "[SIMPLE-LOG] \(getNowClockString()) \(m)"
        let key = "LOGGER_USERDEFAULT"
        var logs = UserDefaults.standard.array(forKey: key)
        if logs == nil {
            logs = [log]
        } else {
            logs?.append(log)
        }
        UserDefaults.standard.set(logs, forKey: key)
    }
    class func w(_ m: Any) {
        func getNowClockString() -> String {
            let formatter = DateFormatter()
            formatter.dateFormat = "yyyy-MM-dd' 'HH:mm:ss"
            let now = Date()
            return formatter.string(from: now)
        }
        let log = "[SIMPLE-LOG] \(getNowClockString()) \(String.init(describing: m))"
        let key = "LOGGER_USERDEFAULT"
        var logs = UserDefaults.standard.array(forKey: key)
        if logs == nil {
            logs = [log]
        } else {
            logs?.append(log)
        }
        UserDefaults.standard.set(logs, forKey: key)
    }
    class func r() {
        let key = "LOGGER_USERDEFAULT"
        guard let logs = UserDefaults.standard.array(forKey: key) else {
            return
        }
        for log in logs {
            print(log)
        }
    }
    class func c() {
        let key = "LOGGER_USERDEFAULT"
        UserDefaults.standard.removeObject(forKey: key)
    }
}

書き出し

kakidasi.swift

Lg.w("ログメッセージ")

コンソール出力

put.swift

Lg.r()

消去

del.swift

Lg.c()

小さいプロジェクト向けに。