log.swift

class FMLog: NSObject {
  let myOsLog = OSLog(subsystem: "com.jiaxq.fotomete", category: "")

  func debug(
    _ msg: String, _ args: CVarArg..., file: String = #file, line: Int = #line
  ) {
    let logMsg = String(format: msg, arguments: args)

    log(logMsg, type: .debug, file: file, line: line)
  }

  func info(
    _ msg: String, _ args: CVarArg..., file: String = #file, line: Int = #line
  ) {
    let logMsg = String(format: msg, arguments: args)

    log(logMsg, type: .info, file: file, line: line)
  }

  func error(
    _ msg: String, _ args: CVarArg..., file: String = #file, line: Int = #line
  ) {
    let logMsg = String(format: msg, arguments: args)

    log(logMsg, type: .error, file: file, line: line)
  }

  func fault(
    _ msg: String, _ args: CVarArg..., file: String = #file, line: Int = #line
  ) {
    let logMsg = String(format: msg, arguments: args)

    log(logMsg, type: .fault, file: file, line: line)
  }

  func log(_ msg: String, type: OSLogType, file: String, line: Int) {
    os_log(
      "%s:%d %s", log: myOsLog, type: type,
      (file as NSString).lastPathComponent, line, msg)
  }
}