有時我們在 App 中提交一些統計信息或者用戶反饋信息時，為了能更好地進行分析，通常會附帶上當前應用程序的名稱、版本號、設備型號、以及設備系統版本。下面演示如何獲取這些信息。

默認情況下我從 UIDevice 中獲取設備型號時只能得到 iPhone、iPod Touch 這樣籠統的類型數據。
這里對 UIDevice 做個擴展，使其可以得到具體的設備型號，比如：iPhone 6s Plus 這樣準確的設備款式。

import UIKit
 
class ViewController: UIViewController {
 
    override func viewDidLoad() {
        super.viewDidLoad()
         
        //應用程序信息
        let infoDictionary = Bundle.main.infoDictionary!
        let appDisplayName = infoDictionary["CFBundleDisplayName"] //程序名稱
        let majorVersion = infoDictionary["CFBundleShortVersionString"]//主程序版本號
        let minorVersion = infoDictionary["CFBundleVersion"]//版本號（內部標示）
        let appVersion = majorVersion as! String
         
        //設備信息
        let iosVersion = UIDevice.current.systemVersion //iOS版本
        let identifierNumber = UIDevice.current.identifierForVendor //設備udid
        let systemName = UIDevice.current.systemName //設備名稱
        let model = UIDevice.current.model //設備型號
        let modelName = UIDevice.current.modelName //設備具體型號
        let localizedModel = UIDevice.current.localizedModel //設備區域化型號如A1533
         
        //打印信息
        print("程序名稱：\(appDisplayName)")
        print("主程序版本號：\(appVersion)")
        print("內部版本號：\(minorVersion)")
        print("iOS版本：\(iosVersion)")
        print("設備udid：\(identifierNumber)")
        print("設備名稱：\(systemName)")
        print("設備型號：\(model)")
        print("設備具體型號：\(modelName)")
        print("設備區域化型號：\(localizedModel)")
    }
 
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}
 
 
//擴展UIDevice
extension UIDevice {
    //獲取設備具體詳細的型號
    var modelName: String {
        var systemInfo = utsname()
        uname(&systemInfo)
        let machineMirror = Mirror(reflecting: systemInfo.machine)
        let identifier = machineMirror.children.reduce("") { identifier, element in
            guard let value = element.value as? Int8, value != 0 else { return identifier }
            return identifier + String(UnicodeScalar(UInt8(value)))
        }
         
        switch identifier {
        case "iPod5,1":                                 return "iPod Touch 5"
        case "iPod7,1":                                 return "iPod Touch 6"
        case "iPhone3,1", "iPhone3,2", "iPhone3,3":     return "iPhone 4"
        case "iPhone4,1":                               return "iPhone 4s"
        case "iPhone5,1", "iPhone5,2":                  return "iPhone 5"
        case "iPhone5,3", "iPhone5,4":                  return "iPhone 5c"
        case "iPhone6,1", "iPhone6,2":                  return "iPhone 5s"
        case "iPhone7,2":                               return "iPhone 6"
        case "iPhone7,1":                               return "iPhone 6 Plus"
        case "iPhone8,1":                               return "iPhone 6s"
        case "iPhone8,2":                               return "iPhone 6s Plus"
        case "iPhone9,1":                               return "iPhone 7 (CDMA)"
        case "iPhone9,3":                               return "iPhone 7 (GSM)"
        case "iPhone9,2":                               return "iPhone 7 Plus (CDMA)"
        case "iPhone9,4":                               return "iPhone 7 Plus (GSM)"
             
        case "iPad2,1", "iPad2,2", "iPad2,3", "iPad2,4":return "iPad 2"
        case "iPad3,1", "iPad3,2", "iPad3,3":           return "iPad 3"
        case "iPad3,4", "iPad3,5", "iPad3,6":           return "iPad 4"
        case "iPad4,1", "iPad4,2", "iPad4,3":           return "iPad Air"
        case "iPad5,3", "iPad5,4":                      return "iPad Air 2"
        case "iPad2,5", "iPad2,6", "iPad2,7":           return "iPad Mini"
        case "iPad4,4", "iPad4,5", "iPad4,6":           return "iPad Mini 2"
        case "iPad4,7", "iPad4,8", "iPad4,9":           return "iPad Mini 3"
        case "iPad5,1", "iPad5,2":                      return "iPad Mini 4"
        case "iPad6,7", "iPad6,8":                      return "iPad Pro"
        case "AppleTV5,3":                              return "Apple TV"
        case "i386", "x86_64":                          return "Simulator"
        default:                                        return identifier
        }
    }
}