Question

有人可以帮助我。我正在尝试使用CCSprite作为移动控制器，我可以拖动（左/右）来移动我的玩家角色。问题是当我在CCSprite之外触摸时它仍然检测为Active，这是我在ccTouchBegan上设置ACTIVE的枚举，以及ccTouchEnded方法中的IDLE。默认情况下，它处于IDLE状态。当我在CCSprite之外开始触摸时，不确定为什么它会激活。

请告知。

- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{
    BOOL touched = NO;

    CGPoint loc = [touch locationInView: touch.view];
    loc = [[CCDirector sharedDirector] convertToGL: loc];

    //avatar is a CCSprite...
    //inside of IF statement should not execute if I touch anywhere on screen 
    //outside of self.avatar sprite, but it still executes....
    if ( CGRectContainsPoint( [self.avatar boundingBox], loc) );
    {
        self.state = ACTIVE;
        self.action = MOVE_STOPPED; //player decides which direction to move, based on action state
        self.currPoint = self.prevPoint = self.avatar.position;
        touched = YES;
    }
    return touched;
}

Answer 1

不是100％，但尝试在转换为GL后添加此内容：

loc = [self.avatar convertToNodeSpace:loc];

Answer 2

如果它帮助了我能够解决问题的任何人。我没有子类化CCLayer，而是继承了CCNode。在我的ccTouchBegan方法中，我做了一个显式绑定检查，以查看touchToNodeSpace中touch的位置是否在sprite的boundingBox内。我从SneakyInput按钮类借用了显式绑定检查。

这是ccTouchBegan方法。如果有人对如何在CCLayer的子类中有任何想法，请告诉我，所以我不必实现自己的CCTouchOneByOneDelegate。

- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{
    BOOL touched = NO;

    CGPoint loc = [touch locationInView: touch.view];
    loc = [[CCDirector sharedDirector] convertToGL: loc];
    loc = [self.avatar convertToNodeSpace: loc]; //YvesLeBorg's feedback

    float width = [self.avatar boundingBox].size.width;
    float height = [self.avatar boundingBox].size.height;
    //if ( CGRectContainsPoint( [self.avatar boundingBox], loc) );
    if ( loc.x < -width || loc.x > width || loc.y < -height || loc.y > height ) return touched;
    else
    {
        self.state = ACTIVE;
        self.action = MOVE_STOPPED;
        self.currPoint = self.prevPoint = self.avatar.position;
        touched = YES;
    }

//    CCLabelTTF *lbl = (CCLabelTTF *)[[[[CCDirector sharedDirector] runningScene] getChildByTag: -10] getChildByTag: 100];
//    NSString *str = [NSString stringWithFormat: @"Touch Pos: (%.2f, %.2f)", [self.avatar boundingBox].size.width, [self.avatar boundingBox].size.height ];
//    [lbl setString: str];

    return touched;
}

Cocos2D-iPhone CGRectContainsPoint检测精灵界外的触摸

2 个答案: