Touch a UIButton and show Unity on UIView or UIViewController

Question

I read several answers on the Unity forum, including here and only show how to create a subclass and present my first UIViewController.

- (void)createViewHierarchyImpl
{
    homeViewController = [[HomeViewController alloc] initWithNibName:@"HomeViewController" bundle:nil];

    //_rootView = _unityView;
    _rootView = homeViewController.view;

    //_rootController = [[UnityDefaultViewController alloc] init];
    _rootController = homeViewController;
}

So far, so good.
The problem is that there are no examples for the new version of the Unity plugin that generates XCode, to show a UIViewController with Unity.

-(void)goToUnity:(id)sender
{
    NSLog(@"touch the button is OK");

    UIViewController *app = [[UIViewController alloc] initWithNibName:@"UnityView" bundle:nil];

    [self.navigationController pushViewController:app animated:YES];
}

Thus, nothing happens. Is there any way to call the Unity in "default" mode Xcode?

Thank you.

score 3 · Accepted Answer · answered Jul 04 '14 at 12:24

Read an read and read many times, test and erros many times, i finally do! Touch a UIButton and open or do whatever you imagine with it.

I will share here for those who need a more complete code.
Getting Started:
You need to create your own main file .h and .m to be "overruled" the Unity automatically:

mainAppController.h

#import "UnityAppController.h"
#import "UI/UnityView.h"
#import "iPhone_View.h"

@interface mainAppController : UnityAppController
{
    UnityAppController  *_unityAppController;
}

- (void)createViewHierarchyImpl;

@end

You have to import this H headers to controll Unity stuffs.

mainAppController.m

#import "mainAppController.h"

@implementation mainAppController

-(void)createViewHierarchyImpl
{
    if(_unityAppController == nil)
    {
        _unityAppController = [[UnityAppController alloc] init];

        NSLog(@"Unity Controller was set NICE!!!!");
    }
    UIStoryboard *storyBoard;

    if ( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad )
    {
        storyBoard = [UIStoryboard storyboardWithName:@"iPadMain" bundle:nil];
    }
    else
    {
        storyBoard = [UIStoryboard storyboardWithName:@"iPhoneMain" bundle:nil];
    }

    UIViewController *mainVC = [storyBoard instantiateInitialViewController];

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    self.window.rootViewController = mainVC;

    _rootController = [self.window rootViewController];
    //_rootController.wantsFullScreenLayout = TRUE;
    _rootController.edgesForExtendedLayout = TRUE;

    _rootView       = _rootController.view;

    [self.window makeKeyAndVisible];
}

@end

IMPL_APP_CONTROLLER_SUBCLASS(mainAppController) //THIS IS VERY IMPORTANT!!!

This last line is the Unity which will "read" and use.

So, see, I used the storyboard, so I have more control over the navigation visually. But you can use whatever you want.

In another any UIViewController, I'll call the Unity, as follows:

ShowARViewController.h

#import <UIKit/UIKit.h>
#import "UnityAppController.h"
#import "UI/UnityView.h"
#import "iPhone_View.h"

@interface ShowARViewController : UIViewController
{
    UnityAppController *unityController;
    IBOutlet UIView *viewToUnity; // This is linked on Storyboard 
}
@end

ShowARViewController.m

#import "ShowARViewController.h"

@interface ShowARViewController ()

@end

@implementation ShowARViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    unityController = (UnityAppController*)[[UIApplication sharedApplication] delegate];
    [viewToUnity addSubview:unityController.unityView];
}
// more methods and codes...
@end

See, so I can have more control of Unity that I added in UIView and I can do what I want, for example, add a button above this view.

I hope I have helped really. If you have any questions or suggestions to make this code better, feel free to write me.

Regards

Hello i want to open unity AR view in my current view controller. I am doing the same. But app crashes say Unityview unrecognised selector sent to — Pradhyuman Chavda, Feb 03 '15 at 10:46
I want to use the Xloudia AR. They provide support in unity. I have unity package and i export it as a Xcode project. Now i want to use it in my existing iOS project. — Pradhyuman Chavda, Feb 04 '15 at 05:32
Do you know how to integrate unity Xcode project in objective c Xcode project? — Pradhyuman Chavda, Feb 04 '15 at 10:26
Yes, this is what have here, what is your Unity version? It is Pro? — Daniel Arantes Loverde, Feb 04 '15 at 10:28
My unity version is 4.6.1. But can we directly drag and drop unity Xcode project into the objective c project or some different way we have to follow different steps to add? — Pradhyuman Chavda, Feb 04 '15 at 11:16
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/70224/discussion-between-jack-loverde-and-ios-developer). — Daniel Arantes Loverde, Feb 04 '15 at 13:34
IMPL_APP_CONTROLLER_SUBCLASS(ViewController) I am getting this error, when I add the above line Undefined symbols for architecture arm64: "_AppControllerClassName", referenced from: +[ViewController(OverrideAppDelegate) load] in ViewController.o Can anyone help with this? — Lenin, Jan 04 '21 at 11:06
Hi @Lenin this post has 6 years. I doesnt work with Unity anymore. Good luck — Daniel Arantes Loverde, Jan 04 '21 at 18:31

score 0 · Answer 2 · answered Apr 12 '14 at 20:47

0

Try getting the controller like this:

UIViewController* controller = [[UnityDefaultViewController] alloc] init];

answered Apr 12 '14 at 20:47

Radu Diță

13,476
2
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34

Nothing happend, touch the button, but the view doesnt show up. Trying to addSubview too, but i had "uncaught exception". Any advice ? Thanks – Daniel Arantes Loverde Apr 12 '14 at 22:16

Touch a UIButton and show Unity on UIView or UIViewController

2 Answers2

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