【Cocos2D学习】基本概念理解

1. 关于Touch

http://www.cocos2d-iphone.org/wiki/doku.php/tips:touchdelegates

两种touch模式：standard touch delegate 和 targeted touch delegate， 各自的协议分别如下：

@protocol CCStandardTouchDelegate <NSObject>
@optional
- (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)ccTouchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event;
@end

@protocol CCTargetedTouchDelegate <NSObject>
- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event;
@optional
// touch updates:
- (void)ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event;
- (void)ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event;
- (void)ccTouchCancelled:(UITouch *)touch withEvent:(UIEvent *)event;
@end

区别在于：

1. 后者的touchbegan需要返回一个BOOL；

2. 后者是单点触摸模式，而前者支持多点触摸。

3. 开启方式不同

前者启动方式为：

self.isTouchEnabled = YES;

后者启动方式为：

-(void) registerWithTouchDispatcher
{
	[[[CCDirector sharedDirector] touchDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:YES];
}

当用户想在非CCLayer的类(或子类)中使用这两个接口时，有两件事情需要做：

1. 该类实现 CCTargetedTouchDelegate 或CCStandardTouchDelegate接口；

2. 在进入该类的(onEnter)的时候注册这些接口，在退出该类的时候(onExit)的时候注销这些接口。

//FOR StandardDelegate
- (void)onEnter
{
	[[[CCDirector sharedDirector] touchDispatcher] addStandardDelegate:self priority:0];
	[super onEnter];
}

//for targeted delegate
- (void)onEnter
{
	[[[CCDirector sharedDirector] touchDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:YES];
	[super onEnter];
}

退出时候：

- (void)onExit
{
	[[[CCDirector sharedDirector] touchDispatcher] removeDelegate:self];
	[super onExit];
}

2. CCBezierBy   和 CCBezierTo

http://blog.csdn.net/we000636/article/details/8616355