在Cocos2D中滚动平铺地图

CCSprite *mapSprite = [CCSprite spriteWithImageNamed:@"map.png"];

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

[self addChild:mapSprite];

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    // 获取触摸点位置
    UITouch *touch = [touches anyObject];
    CGPoint touchLocation = [touch locationInView:touch.view];
    // 转换为层中的坐标
    CGPoint convertedLocation = [[CCDirector sharedDirector] convertToGL:touchLocation];
    // 记录触摸点位置
    _touchStartLocation = convertedLocation;
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    // 获取触摸点位置
    UITouch *touch = [touches anyObject];
    CGPoint touchLocation = [touch locationInView:touch.view];
    // 转换为层中的坐标
    CGPoint convertedLocation = [[CCDirector sharedDirector] convertToGL:touchLocation];
    // 计算触摸点位置变化量
    CGPoint delta = ccpSub(convertedLocation, _touchStartLocation);
    // 移动地图精灵
    mapSprite.position = ccpAdd(mapSprite.position, delta);
    // 更新触摸点位置
    _touchStartLocation = convertedLocation;
}