Swift获取手机型号

public 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 "iPhone3,1", "iPhone3,2", "iPhone3,3":  return "iPhone 4"
        case "iPhone4,1":  return "iPhone 4s"
        case "iPhone5,1":  return "iPhone 5"
        case "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 "iPhone8,4":  return "iPhone SE"
        case "iPhone9,1", "iPhone9,3":  return "iPhone 7"
        case "iPhone9,2", "iPhone9,4":  return "iPhone 7 Plus"
        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 "iPad1,1": return "iPad"
        case "iPad1,2": return "iPad 3G"
        case "iPad2,1", "iPad2,2", "iPad2,3", "iPad2,4":  return "iPad 2"
        case "iPad2,5", "iPad2,6", "iPad2,7":  return "iPad Mini"
        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 "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 "iPad5,3", "iPad5,4":  return "iPad Air 2"
        case "iPad6,3", "iPad6,4":  return "iPad Pro 9.7"
        case "iPad6,7", "iPad6,8":  return "iPad Pro 12.9"
            
        case "AppleTV2,1":  return "Apple TV 2"
        case "AppleTV3,1","AppleTV3,2":  return "Apple TV 3"
        case "AppleTV5,3":  return "Apple TV 4"
            
        case "i386", "x86_64":  return "Simulator"
            
        default:  return identifier
        }
    }
}