VersionNumber.cs

using UnityEngine;
using System.Reflection;


/// <summary>
/// Automatically provides a version number to a project and displays
/// it for 20 seconds at the start of the game.
/// </summary>
/// <remarks>
/// Change the first two number to update the major and minor version number.
/// The following number are the build number (which is increased automatically
///  once a day, and the revision number which is increased every second). 
/// </remarks>
[assembly:AssemblyVersion ("1.0.*")]
public class VersionNumber : MonoBehaviour
{
  /// <summary>
  /// Can be set to true, in that case the version number will be shown in bottom right of the screen
  /// </summary>
  public bool ShowVersionInformation = false;
  /// <summary>
  /// Show the version during the first 20 seconds.
  /// </summary>
  public bool ShowVersionDuringTheFirst20Seconds = true;
  string version;
  Rect position = new Rect (0, 0, 100, 20);

  /// <summary>
  /// Gets the version.
  /// </summary>
  /// <value>The version.</value>
  public string Version {
    get {
      if (version == null) {
        version = Assembly.GetExecutingAssembly ().GetName ().Version.ToString ();
      }
      return version;
    }
  }


  /// Use this for initialization
  void Start ()
  {
    DontDestroyOnLoad (this);

    // Log current version in log file
    Debug.Log (string.Format ("Currently running version is {0}", Version));

    if (ShowVersionDuringTheFirst20Seconds) {
      ShowVersionInformation = true;
      Destroy (this, 20f);
    }
      
    position.x = 10f;
    position.y = Screen.height - position.height - 10f;

  }


  void OnGUI ()
  {
    if (!ShowVersionInformation) {
      return;
    }
      
    GUI.contentColor = Color.gray;
    GUI.Label (position, string.Format ("v{0}", Version));
  }
}