Increment version number on build (Unity/iOS)

BuildAndIncrementVersionNumber.cs

/*
From Derek Arndt's tweet
https://twitter.com/derekarndt/status/993994998084354048
*/

using UnityEditor;
using UnityEditor.Build;
using System.Diagnostics;

public class BuildAndIncrementVersionNumber : IPostprocessBuild
{
    public int callbackOrder { get { return 0; } }

    public void OnPostprocessBuild(BuildTarget target, string pathToBuiltProject)
    {
        //Debug.Log("post processing build");
#if UNITY_IOS
        string buildStr = PlayerSettings.i0S.buildNumber;
        string[] splitBuildStr = buildStr.Split('.');

        if (splitBuildStr.Length != 2)
	        return;

        int buildNuml = Parselnt(splitBuildStr[0]);
        int buildNum2 = Parselnt(splitBuildStr[1]);

        PlayerSettings.iOS.buildNumber = buildNuml.ToString() + "." + (buildNum2 + 1).ToString();
#endif
    }

    static public int Parselnt(object obj)
    {
        if (obj == null)
            return 0;
        int outlnt;
        bool couldParse = System.Int32.TryParse(obj.ToString(), out outlnt);
        if (couldParse) return outlnt;
        return 0;
    }
}