c# - MonoTouch で UIDevice モデルを知るにはどうすればよいですか?

Question

MonoTouch で正確なデバイス モデル (iPad 3 など) を取得したいと考えています。Objective C で実行され
ているの を見たことがありますが、正しい P/Invokes はまだわかりません。

Answer 1

いくつかの場所からこれを取得し、必要なものに変更したため、完全な信用はできません。更新する必要がある列挙型があるのは本当に臭いですが、まあまあです。

しかし、これは私が持っているものです:

public static class DeviceHelper
{
    public const string HardwareProperty = "hw.machine";
    public static readonly string PLATFORM;

    public static bool IsTall
    {
        get
        {
            return UIDevice.CurrentDevice.UserInterfaceIdiom
                == UIUserInterfaceIdiom.Phone
                    && UIScreen.MainScreen.Bounds.Height
                    * UIScreen.MainScreen.Scale >= 1136;
        }
    }

    [DllImport(MonoTouch.Constants.SystemLibrary)]
    static internal extern int sysctlbyname([MarshalAs(UnmanagedType.LPStr)] string property, IntPtr output, IntPtr oldLen, IntPtr newp, uint newlen);

    static DeviceHelper ()
    {
        var pLen = Marshal.AllocHGlobal(sizeof(int));
        sysctlbyname(HardwareProperty, IntPtr.Zero, pLen, IntPtr.Zero, 0);

        var length = Marshal.ReadInt32(pLen);

        var pStr = Marshal.AllocHGlobal(length);
        sysctlbyname(HardwareProperty, pStr, pLen, IntPtr.Zero, 0);

        var hardwareStr = Marshal.PtrToStringAnsi(pStr);

        var ret = HardwareVersion.Unknown;

        if (hardwareStr == "iPhone1,1")
            ret = HardwareVersion.iPhone;
        else if (hardwareStr == "iPhone1,2")
            ret = HardwareVersion.iPhone3G;
        else if (hardwareStr == "iPhone2,1")
            ret = HardwareVersion.iPhone3GS;
        else if (hardwareStr == "iPhone3,1")
            ret = HardwareVersion.iPhone4;
        else if (hardwareStr == "iPhone3,3")
            ret = HardwareVersion.VerizoniPhone4;
        else if(hardwareStr == "iPhone4,1")
            ret = HardwareVersion.iPhone4S;
        else if(hardwareStr == "iPhone 5,1" || hardwareStr == "iPhone 5,2")
            ret = HardwareVersion.iPhone5;
        else if (hardwareStr == "iPad1,1")
            ret = HardwareVersion.iPad;
        else if (hardwareStr == "iPad2,1")
            ret = HardwareVersion.iPad2WIFI;
        else if (hardwareStr == "iPad2,2")
            ret = HardwareVersion.iPad2GSM;
        else if (hardwareStr == "iPad2,3")
            ret = HardwareVersion.iPad2CDMA;
        else if (hardwareStr == "iPad2,4")
            ret = HardwareVersion.iPad2WIFI24;
        else if (hardwareStr == "iPad3,1")
            ret = HardwareVersion.iPad3WIFI;
        else if (hardwareStr == "iPad3,2")
            ret = HardwareVersion.iPad3GSM;
        else if (hardwareStr == "iPad3,3")
            ret = HardwareVersion.iPad3CDMA;
        else if (hardwareStr == "iPod1,1")
            ret = HardwareVersion.iPod1G;
        else if (hardwareStr == "iPod2,1")
            ret = HardwareVersion.iPod2G;
        else if (hardwareStr == "iPod3,1")
            ret = HardwareVersion.iPod3G;
        else if (hardwareStr == "iPod4,1")
            ret = HardwareVersion.iPod4G;
        else if (hardwareStr == "i386" || hardwareStr=="x86_64") {
            if (UIDevice.CurrentDevice.Model.Contains("iPhone"))
                ret = UIScreen.MainScreen.Bounds.Height * UIScreen.MainScreen.Scale == 960 || UIScreen.MainScreen.Bounds.Width * UIScreen.MainScreen.Scale == 960 ? HardwareVersion.iPhone4Simulator : HardwareVersion.iPhoneSimulator;
            else
                ret = HardwareVersion.iPadSimulator;
        }

        if(ret == HardwareVersion.Unknown)
            PLATFORM = hardwareStr;
        else
            PLATFORM = ret.ToString();
    }

    public enum HardwareVersion {
        iPhone,
        iPhone3G,
        iPhone3GS,
        iPhone4,
        VerizoniPhone4,
        iPhone4S,
        iPhone5,
        iPod1G,
        iPod2G,
        iPod3G,
        iPod4G,
        iPad,
        iPad2WIFI,
        iPad2WIFI24,
        iPad2GSM,
        iPad2CDMA,
        iPad3WIFI,
        iPad3GSM,
        iPad3CDMA,
        iPhoneSimulator,
        iPhone4Simulator,
        iPadSimulator,
        Unknown
    }
}

Answer 2

私はこの答えを基礎として使用しました。
これが最短の方法かどうかはわかりませんが、うまくいきます。

[DllImport ("libc", CallingConvention = CallingConvention.Cdecl)]
static extern int sysctlbyname (string name, StringBuilder value, ref IntPtr length, IntPtr newp, IntPtr newlen);

public static string GetDeviceName (this UIDevice device)
{
    IntPtr size = (IntPtr) 8;
    var sb = new StringBuilder ();

    string param = "hw.machine";
    sysctlbyname (param, sb, ref size, IntPtr.Zero, (IntPtr) 0);

    return sb.ToString ();
}