Cocos2d-x UIView和Coco2d-x场景之间的相互跳转切换

UIView和Coco2d-x场景之间的相互切换

首先要解释一下这篇文章要讲解的内容:我们在IOS程序中可能要添加一些用cocos2dx实现的功能的话,

那么就需要涉及到UIView和Cocos2dx场景之间的切换。那么要如何实现呢?

我们如果在xcode中新建一个cocos2dx项目,在ios文件夹中就可以发现,其实这个cocos2dx就是EAGLView,这是一个UIView。

然后这个view封装到RootViewController中;最后,这个controller在AppController中设置为window的root view controller.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // Override point for customization after application launch.

    // Add the view controller's view to the window and display.
    window = [[UIWindow alloc] initWithFrame: [[UIScreen mainScreen] bounds]];
    EAGLView *__glView = [EAGLView viewWithFrame: [window bounds]
                                     pixelFormat: kEAGLColorFormatRGBA8
                                     depthFormat: GL_DEPTH_COMPONENT16
                              preserveBackbuffer: NO
                                      sharegroup: nil
                                   multiSampling: NO
                                 numberOfSamples:0 ];

    // Use RootViewController manage EAGLView
    viewController = [[RootViewController alloc] initWithNibName:nil bundle:nil];
    viewController.wantsFullScreenLayout = YES;
    viewController.view = __glView;

    // Set RootViewController to window
    if ( [[UIDevice currentDevice].systemVersion floatValue] < 6.0)
    {
        // warning: addSubView doesn't work on iOS6
        [window addSubview: viewController.view];
    }
    else
    {
        // use this method on ios6
        [window setRootViewController:viewController];
    }
    
    [window makeKeyAndVisible];

    [[UIApplication sharedApplication] setStatusBarHidden: YES];

    cocos2d::CCApplication::sharedApplication()->run();
    return YES;
}

好了,有了上面的了解,那么我们就有办法了。

假如现在我们的要求是:程序启动,第一个视图是UIView,然后点击button,调到cocos2dx的一个场景,然后点击button还可以返回到UIView。

运行的效果是:

Cocos2d-x UIView和Coco2d-x场景之间的相互跳转切换_第1张图片  Cocos2d-x UIView和Coco2d-x场景之间的相互跳转切换_第2张图片


点击跳到Scene跳转到第二个图片所示的视图;点击跳到View跳回到第一个图片所示的视图。


实现过程:

(1)很明显这是两个view controller控制下的两个view视图:第一个view只包含了一个button(MyViewController);

第二个view包含了一个cocos2dx视图和一个button(RootViewController)。

(2)所以问题就变成了这两个view之间跳转的问题了,下面我采用navigation controller来处理这二者的切换。

(3)先看看AppController.h

#import "MyViewController.h"

@interface AppController : NSObject <UIAccelerometerDelegate, UIAlertViewDelegate, UITextFieldDelegate,UIApplicationDelegate>

@property (nonatomic, retain) UIWindow *window;

@property (nonatomic, retain) UINavigationController* navController;

@property (nonatomic, retain)MyViewController* myController;

@end

然后:AppController.mm

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    
    window = [[UIWindow alloc] initWithFrame: [[UIScreen mainScreen] bounds]];
    
    myController = [[MyViewController alloc] init];
        
    navController = [[UINavigationController alloc] init];
    [navController pushViewController:myController animated:NO];
    navController.navigationBarHidden = YES;

    // Set RootViewController to window
    if ( [[UIDevice currentDevice].systemVersion floatValue] < 6.0)
    {
        // warning: addSubView doesn't work on iOS6
        [window addSubview:navController.view];
    }
    else
    {
        // use this method on ios6
        [window setRootViewController:navController];
    }

    [window makeKeyAndVisible];
    [[UIApplication sharedApplication] setStatusBarHidden: YES];

//    cocos2d::CCApplication::sharedApplication()->run(); 注意暂时不可以run
    return YES;
}

注意最后面:cocos2d::CCApplication::sharedApplication()->run(); 要注释掉,因为开的时候运行的是第一个view,

此时cocos2dx还没有跑起来。

4)所以看看这两个视图controller

第一个图片所对应的 MyViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view.
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    button.frame = CGRectMake(0, 100, 100, 50);
    [button setTitle:@"跳到 Scene" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
}

-(void)buttonPressed:(id)sender
{
    RootViewController* rootController = [[RootViewController alloc]init];
    [self.navigationController pushViewController:rootController animated:YES];
}

第二个图片所对应的 RootViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //添加一个button
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    button.frame = CGRectMake(0, 400, 100, 50);
    [button setTitle:@"跳到 View" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
        
    [self addGLView]; //添加cocos2dx视图
    
}

-(void)buttonPressed:(id)sender
{
    CCDirector::sharedDirector()->end();
    [self.navigationController popViewControllerAnimated:YES];
}


-(void)addGLView
{
    UIWindow *window = [UIApplication sharedApplication].keyWindow;
    EAGLView *__glView = [EAGLView viewWithFrame: [window bounds]
                                     pixelFormat: kEAGLColorFormatRGBA8
                                     depthFormat: GL_DEPTH_COMPONENT16
                              preserveBackbuffer: NO
                                      sharegroup: nil
                                   multiSampling: NO
                                 numberOfSamples:0 ];
    [__glView setFrame:CGRectMake(0, 0, 320, 320)];
    [self.view addSubview:__glView];
    cocos2d::CCApplication::sharedApplication()->run(); //这个时候就run
}



// Override to allow orientations other than the default portrait orientation.
// This method is deprecated on ios6
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return UIInterfaceOrientationIsPortrait( interfaceOrientation );
}

// For ios6, use supportedInterfaceOrientations & shouldAutorotate instead
- (NSUInteger) supportedInterfaceOrientations{
#ifdef __IPHONE_6_0
    return UIInterfaceOrientationMaskPortrait;
#endif
}

- (BOOL) shouldAutorotate {
    return YES;
}

好咯,主要的代码都已经贴出来了。

(5)下面再具体的看看其中关键的部分:

RootViewController

①我们创键了EAGLView的实例,作为subview添加到当前的view。而且设置它的rect为(0,0,320,320)

那么我们可以在HelloWorld 场景中:

//输出当前cocos2dx的size
    CCSize winSize = CCDirector::sharedDirector()->getWinSize();
    CCLog("width = %f;height = %f",winSize.width,winSize.height);

可以发现:输出的和所设置的是一致的。

② 创建EAGLView实例的代码可以直接从项目初始的AppController.mm中直接超过了,然后,注意要:

cocos2d::CCApplication::sharedApplication()->run(); 让cocos2dx跑起来。

③注意其中的屏幕方向也要设置一下(为竖向)。

④现在看看,如何从这个view调回到原来的view呢?在button的回调方法中:

-(void)buttonPressed:(id)sender
{
    CCDirector::sharedDirector()->end();
    [self.navigationController popViewControllerAnimated:YES];
}

很重要的是第一个语句,先结束掉当前的cocos2dx,然后再调回到原来的view。


好咯,大概的过程就是这个样子了,哥我为了这个过程,浪费了半天的时间,尤其是在cocos2dx场景如何跳转回到UIView的问题上。

原来我是想在cocos2dx的场景中的一个menu item 的回调方法中执行跳回view的功能,但是始终不能实现;

最后我想到不要cocos2dx覆盖整个视图,而是作为一个subview,然后添加一个button,直接让这个对应的controller去处理视图的跳转就可以了。


上面的跳转使用到navigation,如果不想添加这个容器的话,直接在controller之间跳转也是可以的。

下面也给出实现的代码,区别只是在于跳转的代码,其他都一样。

AppController.mm

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // Override point for customization after application launch.

    // Add the view controller's view to the window and display.
    window = [[UIWindow alloc] initWithFrame: [[UIScreen mainScreen] bounds]];
    
    myController = [[MyViewController alloc] initWithNibName:nil bundle:nil];
    
    // Set RootViewController to window
    if ( [[UIDevice currentDevice].systemVersion floatValue] < 6.0)
    {
        // warning: addSubView doesn't work on iOS6
        [window addSubview: myController.view];
    }
    else
    {
        // use this method on ios6
        [window setRootViewController:myController];
    }
    
    [window makeKeyAndVisible];

    [[UIApplication sharedApplication] setStatusBarHidden: YES];

//    cocos2d::CCApplication::sharedApplication()->run();
    return YES;
}

RootViewController.mm

-(void)buttonPressed:(id)sender
{
    CCDirector::sharedDirector()->end();
    [self dismissViewControllerAnimated:YES completion:nil];
}


MyViewController

-(void)buttonPressed:(id)sender
{
    RootViewController* rootController = [[RootViewController alloc]init];
    [self presentViewController:rootController animated:YES completion:nil];
}

下面为了有需要的同志,给出navigation实现的代码下载链接:点击打开链接
(内容只包括ios文件夹)



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