iOS-判断设备型号(判断iPhoneX)

import UIKit

public enum DeviceType: Int {
    case simulator
    case appleTV
    case appleTV4K
    case homePod

    case iPod1
    case iPod2
    case iPod3
    case iPod4
    case iPod5

    case iPad2
    case iPad3
    case iPad4
    case iPad5
    case iPadAir1
    case iPadAir2

    case iPadMini1
    case iPadMini2
    case iPadMini3
    case iPadMini4

    case iPadPro9_7
    case iPadPro12_9
    case iPadPro10_5

    case iPhone4
    case iPhone4S
    case iPhone5
    case iPhone5C
    case iPhone5S
    case iPhoneSE
    case iPhone6
    case iPhone6plus
    case iPhone6S
    case iPhone6Splus
    case iPhone7
    case iPhone7plus
    case iPhone8
    case iPhone8plus

    case iPhoneX

    case unrecognized
}

extension UIDevice {
    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 "iPod1,1":                                  return "iPod Touch 1"
        case "iPod2,1":                                  return "iPod Touch 2"
        case "iPod3,1":                                  return "iPod Touch 3"
        case "iPod4,1":                                  return "iPod Touch 4"
        case "iPod5,1":                                  return "iPod Touch 5"
        case "iPod7,1":                                  return "iPod Touch 6"

        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 "iPad6,11", "iPad6,12":                     return "iPad 5"
        case "iPad4,1", "iPad4,2", "iPad4,3":            return "iPad Air 1"
        case "iPad5,3", "iPad5,4":                       return "iPad Air 2"
        case "iPad2,5", "iPad2,6", "iPad2,7":            return "iPad Mini 1"
        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 "iPad6,3", "iPad6,4":                       return "iPad Pro 9.7 Inch"
        case "iPad6,7", "iPad6,8":                       return "iPad Pro 12.9 Inch"
        case "iPad7,1", "iPad7,2":                       return "iPad Pro 12.9 Inch 2.Generation"
        case "iPad7,3", "iPad7,4":                       return "iPad Pro 10.5 Inch"

        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", "iPhone9,3":                   return "iPhone 7"
        case "iPhone9,2", "iPhone9,4":                   return "iPhone 7 Plus"
        case "iPhone8,4":                                return "iPhone SE"
        case "iPhone10,1", "iPhone10,4":                 return "iPhone 8"
        case "iPhone10,2", "iPhone10,5":                 return "iPhone 8 Plus"
        case "iPhone10,3", "iPhone10,6":                 return "iPhone X"

        case "AppleTV5,3":                               return "Apple TV"
        case "AppleTV6,2":                               return "Apple TV 4K"
        case "AudioAccessory1,1":                        return "HomePod"
        case "i386", "x86_64":                           return "Simulator"
        default:                                         return identifier
        }
    }

    var type: DeviceType {
        switch self.modelName {
        case "iPod Touch 1":                    return .iPod1
        case "iPod Touch 2":                    return .iPod2
        case "iPod Touch 3":                    return .iPod3
        case "iPod Touch 4":                    return .iPod4
        case "iPod Touch 5":                    return .iPod5
        case "iPod Touch 6":                    return .iPod5

        case "iPad 2":                          return .iPad2
        case "iPad 3":                          return .iPad3
        case "iPad 4":                          return .iPad4
        case "iPad 5":                          return .iPad5
        case "iPad Air 1":                      return .iPadAir1
        case "iPad Air 2":                      return .iPadAir2
        case "iPad Mini 1":                     return .iPadMini1
        case "iPad Mini 2":                     return .iPadMini2
        case "iPad Mini 3":                     return .iPadMini3
        case "iPad Mini 4":                     return .iPadMini4
        case "iPad Pro 9.7 Inch":               return .iPadPro9_7
        case "iPad Pro 12.9 Inch":              return .iPadPro12_9
        case "iPad Pro 12.9 Inch 2.Generation": return .iPadPro12_9
        case "iPad Pro 10.5 Inch":              return .iPadPro10_5

        case "iPhone 4":                        return .iPhone4
        case "iPhone 4s":                       return .iPhone4S
        case "iPhone 5":                        return .iPhone5
        case "iPhone 5c":                       return .iPhone5C
        case "iPhone 5s":                       return .iPhone5S
        case "iPhone 6":                        return .iPhone6
        case "iPhone 6 Plus":                   return .iPhone6plus
        case "iPhone 6s":                       return .iPhone6S
        case "iPhone 6s Plus":                  return .iPhone6Splus
        case "iPhone 7":                        return .iPhone7
        case "iPhone 7 Plus":                   return .iPhone7plus
        case "iPhone SE":                       return .iPhoneSE
        case "iPhone 8":                        return .iPhone8
        case "iPhone 8 Plus":                   return .iPhone8plus
        case "iPhone X":                        return .iPhoneX

        case "Apple TV":                        return .appleTV
        case "Apple TV 4K":                     return .appleTV4K
        case "HomePod":                         return .homePod
        case "Simulator":                       return .simulator

        default:                                return .unrecognized
        }
    }
}

if UIDevice.current.type == .iPhoneX {
     // iPhoneX
} else {
     // other
}