Cocos2d 2.0与UIKit结合使用

本文是阅读How To Integrate Cocos2D and UIKit后的总结，这篇教程里面cocos2d的版本比较老，和现在的模版有点差别，所以在重复上面的例子时候进行了相应的修改

原文地址为:http://www.raywenderlich.com/4817/how-to-integrate-cocos2d-and-uikit

Cocos2d新建的项目中，启动流程是这样的：

在SupportingFiles\main.m 中调用了如下方法

int retVal = UIApplicationMain(argc, argv, nil, @"AppController");

启动的时候，UIKit创建了一个AppController的实例，然后AppController在applicationDidFinishLaunching方法中创建了main
window.

// Create the main window
window_ = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

如果我们想从XIB文件启动的话，可以这样做：

把Supporting Files\main.m上UIApplicationMain的参数修改成nil

int retVal = UIApplicationMain(argc, argv, nil, nil);

这样，UIkit启动的时候，会根据Info.plist文件中的NSMainNibFile的值来加载相应的XIB文件

在Info.plist添加值



然后创建一个空的XIB文件



设置File’s Owner为UIApplication



然后拖一个Object对象进去设置成AppController类



这样，XIB就会生成一个AppController的实例

然后把File’s Owner的delegate设置为AppController



这样，UIApplication就会调用AppController的UIApplicationDelegate方法例如applicationDidFinishLaunching方法

如果想用XIB来创建UIWindow,那么将AppDelegate.h的代码改成：

@property (nonatomic, retain) IBOutlet UIWindow *window;

并将.m文件中的创建代码注释掉

// Create the main window
//	window_ = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

在XIB文件拖一个window对象，绑定起来



接下来，用IB创建一个菜单界面，所以得先把这些代码先删了

//	// Create a Navigation Controller with the Director
//	navController_ = [[UINavigationController alloc] initWithRootViewController:director_];
//	navController_.navigationBarHidden = YES;
//
//	// set the Navigation Controller as the root view controller
//	[window_ setRootViewController:navController_];

注意：

我在例子里多删了一个函数，结果导致了UITextfield输入不了文字

[window_ makeKeyAndVisible];

现在添加一个菜单viewController,把默认朝向改成Landscape



然后在里面放了1个背景图和2个按钮



在Xcode 4.5版本的里面，拖拽控件会有Constraints这个东西出现，在ios5的系统运行就会报错，如果想在ios6以下系统运行，必须在xib文件的这个选项取消掉Use
Autolayout



接下来打开MainWindow.xib添加一个NavigationController,并把window的rootViewController设置为它，MainMenuViewController设置为它的viewController。





接下来创建一个RootViewController,当点击View按钮时候，弹出这个界面，这个界面显示cocos2d的绘制界面

在RootViewController.m添加一个方法，将NavigationBar给隐藏了。

// Add new method
- (void) viewWillAppear:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:YES animated:animated];
[super viewWillAppear:animated];
}

然后控制该界面的朝向

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return UIInterfaceOrientationIsLandscape(interfaceOrientation);
}

在MainMenuViewController里面添加RootViewController对象，和点击处理方法

@interface MainMenuViewController : UIViewController
{
RootViewController *_rootViewController;
}

@property (retain) RootViewController *rootViewController;

-(IBAction)viewTapped:(id)sender;

@end

然后在MainMenuViewContoller.m文件里添加

- (void)showCocos2DView:(id)arg
{
if (_rootViewController == nil) {
self.rootViewController = [[[RootViewController alloc] initWithNibName:nil bundle:nil] autorelease];
}
[self.navigationController pushViewController:_rootViewController animated:YES];
}

-(IBAction)viewTapped:(id)sender
{
[self showCocos2DView:nil];
}

在XIB中把按钮处理函数绑定起来



然后在RootViewController中添加：

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.

CCDirector* director_ = [CCDirector sharedDirector];

[self.view insertSubview:director_.view atIndex:0];
[director_ runWithScene:[HelloWorldLayer scene]];
[director_ startAnimation];
}

然后运行发现



通过调试发现，在创建AppDelegate里面创建CCGLView的时候，使用的CGRect(0,0,320,480)

在Cocos2d 2.0版本里，CCDirector类的父类是UIViewController,在朝向发生改变的时候，UIViewController的朝向相关的函数进行相应的处理，为了方便起见，我直接设置为CGRect(0,0,480,320)

CCGLView *glView = [CCGLView viewWithFrame:CGRectMake(0, 0, 480, 320)
pixelFormat:kEAGLColorFormatRGB565	//kEAGLColorFormatRGBA8
depthFormat:0	//GL_DEPTH_COMPONENT24_OES
preserveBackbuffer:NO
sharegroup:nil
multiSampling:NO
numberOfSamples:0];

然后在RootViewController.xib拖拽2个按钮，并在RootViewController里面添加-(IBAction)homeTapped:(id)sender方法

-(IBAction)homeTapped:(id)sender
{
[self.navigationController popViewControllerAnimated:YES];
}

将这个方法和按钮绑定，点击按钮就可以回到主菜单



接下来添加手势识别

添加点击，双击，左滑动，右滑动

在HelloWorldLayer.h里添加如下手势：

// HelloWorldLayer
@interface HelloWorldLayer : CCLayer <GKAchievementViewControllerDelegate, GKLeaderboardViewControllerDelegate>
{
UITapGestureRecognizer *_tapRecognizer;
UITapGestureRecognizer *_doubleTapRecognizer;
UISwipeGestureRecognizer *_swipeLeftRecognizer;
UISwipeGestureRecognizer *_swipeRightRecognizer;
}

@property (retain) UITapGestureRecognizer * tapRecognizer;
@property (retain) UITapGestureRecognizer * doubleTapRecognizer;
@property (retain) UISwipeGestureRecognizer * swipeLeftRecognizer;
@property (retain) UISwipeGestureRecognizer * swipeRightRecognizer;

HelloWorldLayer.m中添加

@synthesize tapRecognizer = _tapRecognizer;
@synthesize doubleTapRecognizer = _doubleTapRecognizer;
@synthesize swipeLeftRecognizer = _swipeLeftRecognizer;
@synthesize swipeRightRecognizer = _swipeRightRecognizer;

- (void)onEnter {
self.doubleTapRecognizer = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)] autorelease];
_doubleTapRecognizer.numberOfTapsRequired = 2;
[[CCDirector sharedDirector].view addGestureRecognizer:_doubleTapRecognizer];

self.tapRecognizer = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)] autorelease];
[_tapRecognizer requireGestureRecognizerToFail:_doubleTapRecognizer];
[[CCDirector sharedDirector].view addGestureRecognizer:_tapRecognizer];

self.swipeLeftRecognizer = [[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleLeftSwipe:)] autorelease];
_swipeLeftRecognizer.direction = UISwipeGestureRecognizerDirectionLeft;
[[CCDirector sharedDirector].view addGestureRecognizer:_swipeLeftRecognizer];

self.swipeRightRecognizer = [[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleRightSwipe:)] autorelease];
_swipeRightRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
[[CCDirector sharedDirector].view addGestureRecognizer:_swipeRightRecognizer];
}

- (void)onExit {
[[CCDirector sharedDirector].view removeGestureRecognizer:_tapRecognizer];
[[CCDirector sharedDirector].view removeGestureRecognizer:_doubleTapRecognizer];
[[CCDirector sharedDirector].view removeGestureRecognizer:_swipeLeftRecognizer];
[[CCDirector sharedDirector].view removeGestureRecognizer:_swipeRightRecognizer];
}

- (void)handleTap:(UITapGestureRecognizer *)tapRecognizer {
CCLOG(@"Tap!");
}

- (void)handleDoubleTap:(UITapGestureRecognizer *)doubletapRecognizer {
CCLOG(@"Double Tap!");
}
- (void)handleLeftSwipe:(UISwipeGestureRecognizer *)swipeRecognizer {
CCLOG(@"Swipe Left!");
}

- (void)handleRightSwipe:(UISwipeGestureRecognizer *)swipeRecognizer {
CCLOG(@"Swipe Right!");
}

// on "dealloc" you need to release all your retained objects
- (void) dealloc
{
// in case you have something to dealloc, do it in this method
// in this particular example nothing needs to be released.
// cocos2d will automatically release all the children (Label)
[_tapRecognizer release];
_tapRecognizer = nil;
[_doubleTapRecognizer release];
_doubleTapRecognizer = nil;
[_swipeLeftRecognizer release];
_swipeLeftRecognizer = nil;
[_swipeRightRecognizer release];
_swipeRightRecognizer = nil;
// don't forget to call "super dealloc"
[super dealloc];
}

在这里需要说明的是，为了防止双击事件的第一次点击触发单击的相应函数，所以调用了这个方法：

[_tapRecognizer requireGestureRecognizerToFail:_doubleTapRecognizer];

Layer与RootViewController的通讯的话，把RootViewController的指针传给Layer就可以了。