PROSAGA码农传奇-XOS-使用从系统收集的数据（macOS）初始化模型类的正确方法

使用从系统收集的数据（macOS）初始化模型类的正确方法

作者: 文艺青年
发布时间: 2025-03-29 06:33:25 (14天前)
转自：

<div class =“post-text”itemprop =“text”>
  <P>
    我同意亚光，
    <EM>
      适当的是判断力
    </EM>
    。
  </p>
  <P>
    合理的解决方案是惰性实例化属性，两个值都被检索
    的<strong>
      一旦
    </强>
     第一次访问该属性时
  </p>
   <pre>
    <code>
      class SysInfoModel {

// Returns the hardware model identifier as a string
    lazy var macModel : String = {
        let service = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("IOPlatformExpertDevice"))
        defer{IOObjectRelease(service)}
        guard let modelData = IORegistryEntryCreateCFProperty(service, "model" as CFString, kCFAllocatorDefault, 0).takeRetainedValue() as? Data else {
            return "Hardware model not found"
        }
        return String(data: modelData, encoding: .utf8)!
    }()

// Returns the OS Version as a String
    lazy var osVersion : String = {
        let osVersion = ProcessInfo.processInfo.operatingSystemVersion
        return "\(osVersion.majorVersion).\(osVersion.minorVersion).\(osVersion.patchVersion)"
    }()

}

</code>
  </pre>
</DIV>