XCodePostprocessSplashFix.cs

using UnityEngine;
using UnityEditor;
using UnityEditor.Callbacks;
#if UNITY_IPHONE
using UnityEditor.iOS.Xcode;
#endif
using System.IO;

public static class XCodePostprocessSplashFix
{
	#if UNITY_IPHONE
	const string XCODE_PROJECT_NAME = "Unity-iPhone";

	[PostProcessBuild]
	static void OnPostProcessBuild(BuildTarget target, string pathToBuiltProject)
	{
		if (target == BuildTarget.iOS)
		{
			//Launch screen
			//Set team ID manually
			string projPath = pathToBuiltProject + "/" + XCODE_PROJECT_NAME + ".xcodeproj/project.pbxproj";

			PBXProject proj = new PBXProject();
			proj.ReadFromString(File.ReadAllText(projPath));
			AddFileToProject(ref proj, pathToBuiltProject, "Editor/customlaunchscreen.png", "customlaunchscreen.png"); //If you have png used in your Storyboard
			AddFileToProject(ref proj, pathToBuiltProject, "Editor/CustomLaunchScreen.storyboard", "ActualLaunchScreen.storyboard"); //This one is used by iOS
			AddFileToProject(ref proj, pathToBuiltProject, "Editor/LaunchScreen.storyboard", "LaunchScreen.storyboard"); //Used by Unity for 1 sec for "reasons" 
			//This uses the CustomSplashViewController class to disable Unity orientation hacks
			
			AddFileToProject(ref proj, pathToBuiltProject, "Editor/CustomSplashViewController.h", "CustomSplashViewController.h");
			AddFileToProject(ref proj, pathToBuiltProject, "Editor/CustomSplashViewController.m", "CustomSplashViewController.m");

			// Get plist
			string plistPath = pathToBuiltProject + "/Info.plist";
			PlistDocument plist = new PlistDocument();
			plist.ReadFromString(File.ReadAllText(plistPath));

			//Set the Storyboard without custom class
			rootDict.SetString("UILaunchStoryboardName", "ActualLaunchScreen");

			//Optionally delete the deprecated garbage values added by Unity
			//rootDictValues.Remove("UILaunchStoryboardName~ipad");
			//rootDictValues.Remove("UILaunchStoryboardName~iphone");
			//rootDictValues.Remove("UILaunchStoryboardName~ipod");

			// Write to file
			File.WriteAllText(plistPath, plist.WriteToString());
		}
	}


	static void AddFileToProject(ref PBXProject proj, string pathToBuiltProject, string assetPath, string projectPath) {

		string sourcepath = Path.Combine(Application.dataPath, assetPath);
		string targetpath = Path.Combine(pathToBuiltProject, projectPath);

		string targetguid = proj.TargetGuidByName(XCODE_PROJECT_NAME);

		Debug.Log("Add File To Xcode project: " + sourcepath + " -> " + targetpath);

		File.Copy(sourcepath, targetpath, true);
		string guid = proj.AddFile(targetpath, projectPath, PBXSourceTree.Source);
		proj.AddFileToBuild(targetguid, guid);
	}
	#endif
}