[泰然翻译] cocos2d programming guide 特殊动作 （CallFunc、CCPropertyAction）

特殊动作：
CallFunc
CCCallFunc动作允许你从一个动作中调用一个方法。在连续动作的结尾这个方法很有用。
举例：
id actionTo = [CCMoveTo actionWithDuration: 2 position: ccp(s.width-40, s.height-40)];
id actionBy = [CCMoveBy actionWithDuration: 2 position: ccp(80,80)];
id actionCallFunc = [CCCallFunc actionWithTarget:self selector:@selector(doATask)];

id actionSequence = [CCSequence actions: actionTo, actionBy, actionCallFunc, nil];

-(void) doATask
{
　　//some code
}

CallFuncN和CallFuncND
有两种CCCallFunc，它们是CCCallFuncN和CCCallFuncND
CCCallFuncN用一个结点做实参，CCCallFuncND用结点和指针来传递数据:
id actionCallFuncN = [CCCallFuncN actionWithTarget:self selector:@selector(doATaskN:)];

 // make sure you notice the trailing :

id actionCallFuncND = [CCCallFuncND actionWithTarget:self selector:@selector(doATaskND:data:) data:pointerToSomeData];

- (void) doATaskN: (id)node

{

　　//some code

}

- (void) doATaskND: (id)node data:(void*)d

{

　　//some code

}

CallBlock / CallBlockN

// BCA is cocos2d macro that means: Block Copy Autorelease 

// CCCallBlock (no arguments)

id blockAction = [CCCallBlock actionWithBlock:^{                       

[label setString:@"Called Block!"];               

}]; 

// CCCallBlockN (passes the Node as an argument)

void (^block)(CCNode*) =  BCA(^(CCNode *n) {               

// do something generic with node               

CCLOG(@"called block for %@", n);

});

id blockAction2 = [CCCallBlockN actionWithBlock:block]；

CCFollow模拟数码相机，接下来的顶点会居中:

// create an spriteid sprite = [CCSprite xxxx]; [self addChild:sprite];

[self runAction: [CCFollow actionWithTarget:sprite worldBoundary:CGRectMake(0, 0, (winSize.width*2)-100, winSize.height)]];

CCPropertyAction
这是一个让你修改任意的object-c类的属性的普通动作

// It will modify the "rotation" property from 0 to -270 in 2 seconds, and then it will run the reverse action.        

id rot =[CCPropertyAction actionWithDuration:2key:@"rotation" from:0 to:-270];       

id rot_back = [rot reverse];       

id rot_seq =[CCSequence actions:rot, rot_back, nil];

 

 

附练习代码（CCFuncBlock的2种形式）：

 

   //移动到指定位置
    CCMoveTo *moveTo = [CCMoveTo actionWithDuration:1 position: ccp(convertedLocation.x,convertedLocation.y)];
    
    //用CCCallBlock的block方式
//    CCCallBlock *block1 = [CCCallBlock actionWithBlock:^(void){
//        [flight runAction:[CCRotateBy actionWithDuration:2 angle:45]];
//        [self flightBezier:convertedLocation];
//        }];
    void (^blockTemp1)(void) = ^(void){ 
        [flight runAction:[CCRotateBy actionWithDuration:2 angle:45]];
        [self flightBezier:convertedLocation];
    };
    CCCallBlock *block1 = [CCCallBlock actionWithBlock:blockTemp1];
    
    //用CCCallBlockN的block方式   带参
//    CCCallBlockN *block2 = [CCCallBlockN actionWithBlock:^(CCNode *node) {
//        [(CCSprite *)node runAction:[CCRotateBy actionWithDuration:2 angle:45]];
//        [self flightBezier:convertedLocation];
//        }];
    
    void (^blockTemp2)(CCNode*) = ^(CCNode *node) {               
        // do something generic with node               
        [(CCSprite *)node runAction:[CCRotateBy actionWithDuration:2 angle:45]];
        [self flightBezier:convertedLocation];
    };
    CCCallBlockN *block2 = [CCCallBlockN actionWithBlock:blockTemp2];

    id seq = [CCSequence actions: moveTo, block1, nil];
    [seq setTag:105];
    [flight runAction:seq];