Log to a file, then use `copyLogToClipboard()` or `printLog()` function to read it.

FileLogger.swift

import Foundation
import UIKit

class FileLogger {
    private static let defaultFileName = "log.txt"
    static let shared = FileLogger()

    private init() {
        read()
    }

    private var fileName: String = FileLogger.defaultFileName
    private var shouldLogTime = true
    private var shouldPrintLog = true

    private(set) var content: String = ""

    private var filePath: String? {
        FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask).first?.appendingPathComponent(fileName).path
    }

    func changeConfiguration(fileName: String, shouldLogTime: Bool, shouldPrintLog: Bool) {
        self.fileName = fileName
        self.shouldLogTime = shouldLogTime
        self.shouldPrintLog = shouldPrintLog
    }

    func log(_ message: String) {
        let newMessage = "\(shouldLogTime ? "\(Date()): " : "")\(message)\n"
        content += newMessage
        write()

        if shouldPrintLog {
            print(newMessage)
        }
    }

    private func read() {
        guard let filePath else {
            print("FileLogger - Read failed - Path not found")
            return
        }

        do {
            content = try String(contentsOfFile: filePath)
        } catch {
            print("FileLogger - Read failed - \(error.localizedDescription)")
        }
    }

    private func write() {
        guard let filePath else {
            print("FileLogger - Write failed - Path not found")
            return
        }

        do {
            try content.write(toFile: filePath, atomically: true, encoding: .utf8)
        } catch {
            print("FileLogger - Write failed - \(error.localizedDescription)")
        }
    }

    func copyLogToClipboard() {
        UIPasteboard.general.string = content
        print("FileLogger - Copied to clipboard")
    }

    func printLog() {
        print(content)
    }

    func clear() {
        content = ""
        write()
    }
}