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Unity与iOS原生01

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以原生为主的启动、原生与Unity3D视图Push/Pop切换

参考文章:在iOS APP中反复打开和关闭Unity页面 ，不吝赐教hertz@hertzwang.com

获取Unity

使用 Unity Version 5.3.5f1 Personal和Xcode 7.3.1

1、打开Unity New 一个新项目；

2、File–>Build Settings...打开Build Setting对话框，Platform选择iOS，点击Build按钮生成Xcode工程；

3、从Finder打开生成的Xcode项目；

4、在Project/Classes/中新建原生视图HomepageViewController，使用XIB：

4.1、HomepageViewController.h

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#import <UIKit/UIKit.h>
	
/**
 *  定义推出Unity视图Block
 *
 *  @param isFirst 首次点击
 */
typedef void(^HomepageViewControllerPushUnityBlock)(BOOL isFirst);
	
/**
 *  原生主视图
 */
@interface HomepageViewController : UIViewController
	
/**
 *  按钮点击回调
 */
@property (nonatomic, copy) HomepageViewControllerPushUnityBlock homepageViewControllerPushUnityBlock;
	
@end

4.2、HomepageViewController.m 

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/**
 *  Push Unity视图
 *
 *  @param sender 按钮
 */
- (IBAction)pushUnity:(UIButton *)sender {
    if (_homepageViewControllerPushUnityBlock) {
        _homepageViewControllerPushUnityBlock(!sender.isSelected);
    }
    
    [sender setSelected:YES];
}

5、在UnityAppController.h中声名HomepageViewController和UINavigationController：

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HomepageViewController *homepageViewController; //原生主视图
UINavigationController *homepageNavigationController; //导航控制器

6、 UnityAppController.mm修改，调整启动顺序和界面切效果：

  • 6.1、添加一个成员变量homepageEnable，用于防止多次创建原生视图 

      BOOL homepageEnable = YES; //只启动一次

  • 6.2、修改方法applicationDidBecomeActive:，注释Unity的启动、添加调用新启动： 

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    - (void)applicationDidBecomeActive:(UIApplication*)application
    {
    	::printf("-> applicationDidBecomeActive()\n");

        //add new code begin
        if (homepageEnable) {
            homepageEnable = NO;
            [self performSelector:@selector(startHomepage:) withObject:application afterDelay:0];
        }
        //add new code end
        
    	if(_snapshotView)
    	{
    		[_snapshotView removeFromSuperview];
    		_snapshotView = nil;
    	}

    	if(_unityAppReady)
    	{
    		if(UnityIsPaused() && _wasPausedExternal == false)
    		{
    			UnityPause(0);
    			UnityWillResume();
    		}
    		UnitySetPlayerFocus(1);
    	}
    	else if(!_startUnityScheduled)
    	{
    		_startUnityScheduled = true;
    		//[self performSelector:@selector(startUnity:) withObject:application afterDelay:0]; //注释Unity启动
    	}

    	_didResignActive = false;
    }

  • 6.3、实现startHomepage:方法： 

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    /**
     *  启动原生视图
     *
     *  @param application 应用
     */
    - (void)startHomepage:(UIApplication*)application {
        
        //初始化原生视图
        homepageViewController = [[HomepageViewController alloc] initWithNibName:@"HomepageViewController" bundle:[NSBundle mainBundle]];
        __weak UnityAppController *weakSelf = self;
        homepageViewController.homepageViewControllerPushUnityBlock = ^(BOOL isFirst) {
            if (isFirst) {
                [weakSelf startUnity:application]; //首次点击调用启动Unity
            } else {
                [weakSelf restartUnity];
            }
        };
        //初始化导航控制器
        homepageNavigationController = [[UINavigationController alloc] initWithRootViewController:homepageViewController];
    	[homepageNavigationController setNavigationBarHidden:YES]; //隐藏导航栏
        //设置为主视图
        [_window setRootViewController:homepageNavigationController];
        [UnityGetMainWindow() makeKeyAndVisible];
    }

  • 6.4、实现restartUnity方法： 

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    /**
     *  重启Unity
     */
    - (void)restartUnity {
        
        [homepageNavigationController pushViewController:_rootController animated:YES]; //Push出Unity
        
        if (_didResignActive) {
            UnityPause(false); //恢复Unity
        }
        
        _didResignActive = NO;
    }

7、修改UnityAppController+ViewHandling.mm的showGameUI方法实现Push效果，并添加Pop按钮： 

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- (void)showGameUI
{
	HideActivityIndicator();
	HideSplashScreen();
	
	// make sure that we start up with correctly created/inited rendering surface
	// NB: recreateGLESSurface won't go into rendering because _unityAppReady is false
	[_unityView recreateGLESSurface];
	
    //add code begin
    //添加一个按钮，用于返回原生视图
    UIButton *popToHomepageBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    [popToHomepageBtn setFrame:CGRectMake(40, 84, 150, 44)];
    [popToHomepageBtn setBackgroundColor:[UIColor redColor]];
    [popToHomepageBtn setTitle:@"Pop to Homepage" forState:UIControlStateNormal];
    [popToHomepageBtn addTarget:self action:@selector(popToHomepageViewController) forControlEvents:UIControlEventTouchUpInside];
    [_rootView addSubview:popToHomepageBtn];
    //add code end
    
	// UI hierarchy
//	[_window addSubview: _rootView]; //注释window添加Unity主视图
//	_window.rootViewController = _rootController;//注释window添加Unity主视图
	[_window bringSubviewToFront:_rootView];
    [homepageNavigationController pushViewController:_rootController animated:YES]; //add code，Push Unity主视图
	
	// why we set level ready only now:
	// surface recreate will try to repaint if this var is set (poking unity to do it)
	// but this frame now is actually the first one we want to process/draw
	// so all the recreateSurface before now (triggered by reorientation) should simply change extents
	
	_unityAppReady = true;
	
	// why we skip present:
	// this will be the first frame to draw, so Start methods will be called
	// and we want to properly handle resolution request in Start (which might trigger surface recreate)
	// NB: we want to draw right after showing window, to avoid black frame creeping in
	
	_skipPresent = true;
	
	if (!UnityIsPaused())
		UnityRepaint();
	
	_skipPresent = false;
	[self repaint];
	
	[UIView setAnimationsEnabled:YES];
}

8、修改UnityAppController+ViewHandling.mm的transitionToViewController:方法解决横屏下Push/Pop问题 

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- (void)transitionToViewController:(UIViewController*)vc
{
    /**
     *  注释：只保留 layoutSubviews，
     *  
     *  willTransitionToViewController:fromViewController: 或 更新_rootController 导致Push后黑屏
     *  更换rootViewController导致不能Pop
     */
//	[self willTransitionToViewController:vc fromViewController:_rootController];
//	_rootController = vc;
//	_window.rootViewController = vc;

	[_rootView layoutSubviews];
}

总结

  • 实现原生为主启动通过改变启动顺序实现
  • 实现Push/Pop效果添加导航栏，并在相应的地方Push/Pop即可

目前存在的问题（已解决，参照8）

  • 横屏状态Push，Unity界面黑屏
  • 竖屏Push到Unity界面，Unity界面切换到横屏时点击Pop界面卡死

补充