got rid of main.swift file => just call unity_init from AppDelegate, minor refactorings, tested with unity 5.5.2 on Xcode 8.3.2

Author: Martin Straub

README.md

@@ -11,7 +11,7 @@ script and the project import are directly derieved from his work. The video
 he made in the provided link is worth watching.
 
 This covers Unity 5+. At the time of this writing this has been
-successfully used with Unity `5.2.2f1` and `Swift 3.0` under `Xcode 8.0`.
+successfully used with Unity `5.5.2f1` and `Swift 3.1` under `Xcode 8.3.2`.
 
 This works with storyboards.
 
@@ -91,7 +91,6 @@ which is not diffiucilt, it's just time consuming given the number of files.
 - Clean up your unity project
 - Add the `objc` folder in this repo with the new custom unity init and obj-c bridging header
 - Rename `main` in `main.mm` to anything else
-- Alter the application delegate and create a main.swift file.
 - Wrap the UnityAppController into your application delegate
 - Adjust the `GetAppController` function in `UnityAppController.h`
 - Go bananas, you did it! Add the unity view wherever you want!
@@ -125,7 +124,7 @@ You can also adjust your
 UNITY_RUNTIME_VERSION
 ```
 
-If you are not using  `5.2.2f1`.
+If you are not using  `5.5.2f1`.
 
 
 #### Add a new `run script` build phase
@@ -202,47 +201,6 @@ Anyway, we need to rename this function to anything but `main`:
 int main_unity_default(int argc, char* argv[])
 ```
 
-#### Alter the swift application delegate and create a main.swift file
-
-We have to get our initialization point done however, so we need some small additions/changes.
-
-Open your `AppDelegate.swift` you will see this at the top of the file:
-
-```swift
-@UIApplicationMain
-class AppDelegate: UIResponder, UIApplicationDelegate {
-```
-
-All we are going to do is remove `@UIApplicationMain` so we
-are left with the following after we are done:
-
-```swift
-class AppDelegate: UIResponder, UIApplicationDelegate {
-```
-
-Now we need to let xcode know where our new main is. Go ahead and create
-a new swift file called `main.swift`. Paste this into it:
-
-```swift
-import Foundation
-import UIKit
-
-// overriding @UIApplicationMain
-// http://stackoverflow.com/a/24021180/1060314
-
-custom_unity_init(CommandLine.argc, CommandLine.unsafeArgv)
-let newUnsafeArgv = UnsafeMutableRawPointer( CommandLine.unsafeArgv ).bindMemory( to: UnsafeMutablePointer<Int8>.self, capacity: Int( CommandLine.argc ) )
-UIApplicationMain( CommandLine.argc, newUnsafeArgv , NSStringFromClass( UIApplication.self ), NSStringFromClass( AppDelegate.self ) )
-```
-
-Assuming your bridging header is properly registered, xcode will NOT be
-complaining about `custom_unity_init`. If it is, something is wrong with the
-bridging header registration. Go check that out.
-
-Note that if your `AppDelegate` is NOT called `AppDelegate` you will need to update
-the last  argument above in `UIApplicationMain(<argc>, <argv>, <UIApplication>, <here>)`
-to be whatever yours is called.
-
 #### Wrap the UnityAppController into your application delegate
 
 We are taking away control from the unity generated application delegate, we
@@ -278,6 +236,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
 
     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {
         self.application = application
+        unity_init(CommandLine.argc, CommandLine.unsafeArgv)
         currentUnityController = UnityAppController()
         currentUnityController!.application(application, didFinishLaunchingWithOptions: launchOptions)
 

Unity.xcconfig

@@ -4,7 +4,7 @@
 //  Created by Adam Venturella on 10/28/15.
 //  Settings from http://www.the-nerd.be/2015/08/20/a-better-way-to-integrate-unity3d-within-a-native-ios-application/
 
-UNITY_RUNTIME_VERSION = 5.5.0f3;
+UNITY_RUNTIME_VERSION = 5.5.2f1;
 UNITY_SCRIPTING_BACKEND = il2cpp;
 UNITY_IOS_EXPORT_PATH = /Path/To/Your/Unity/iOS/Build;
 GCC_PREFIX_HEADER = $(UNITY_IOS_EXPORT_PATH)/Classes/Prefix.pch;

objc/UnityBridge.h

@@ -10,20 +10,5 @@
 #import <UIKit/UIKit.h>
 #import "UnityUtils.h"
 #import "UnityAppController.h"
-#import "Unity/UnityInterface.h"
+#import "UnityInterface.h"
 #endif /* UnityBridge_h */
-
-
-
-/**
-  * Replacement Function for UnityAppController.h
-  *
-  */
-/*
- NS_INLINE UnityAppController* GetAppController(){
-
- NSObject<UIApplicationDelegate>* delegate = [UIApplication sharedApplication].delegate;
- UnityAppController* currentUnityController = (UnityAppController *)[delegate valueForKey:@"currentUnityController"];
- return currentUnityController;
- }
-*/

objc/UnityUtils.h

@@ -8,6 +8,6 @@
 #define UnityUtils_h
 
 
-void custom_unity_init(int argc, char* argv[]);
+void unity_init(int argc, char* argv[]);
 
 #endif /* UnityUtils_h */

objc/UnityUtils.mm

@@ -25,7 +25,7 @@
 void UnityInitTrampoline();
 
 
-extern "C" void custom_unity_init(int argc, char* argv[])
+extern "C" void unity_init(int argc, char* argv[])
 {
     @autoreleasepool
     {