Question

如何使用cocos2d 2.0 来给一个Sprite添加遮罩

Answer 1

// Replace +(CCScene *) scene with the following

+(CCScene *) sceneWithLastCalendar:(int)lastCalendar // new

{

CCScene *scene = [CCScene node];

HelloWorldLayer *layer = [[[HelloWorldLayer alloc]

initWithLastCalendar:lastCalendar] autorelease]; // new

[scene addChild: layer];

return scene;

}

// Replace init with the following

-(id) initWithLastCalendar:(int)lastCalendar

{

if( (self=[super init])) {

CGSize winSize = [CCDirector sharedDirector].winSize;

do {

calendarNum = arc4random() %3+1;

} while (calendarNum == lastCalendar);

NSString * spriteName = [NSString

stringWithFormat:@"Calendar%d.png", calendarNum];

// BEGINTEMP

CCSprite * cal = [CCSprite spriteWithFile:spriteName];

cal.position = ccp(winSize.width/2, winSize.height/2);

[self addChild:cal];

// ENDTEMP

self.isTouchEnabled = YES;

}

return self;

}

// Add new methods

- (void)registerWithTouchDispatcher {

[[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self

priority:0 swallowsTouches:YES];

}

- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event {

CCScene *scene = [HelloWorldLayer sceneWithLastCalendar:calendarNum];

[[CCDirector sharedDirector] replaceScene:

[CCTransitionJumpZoom transitionWithDuration:1.0 scene:scene]];

return TRUE;

}
转载，仅供参考。