Question

更新
我用以下代码解决了这个问题：

- (BOOL) isInside:(NSSet *)touches
{
    //NSLog(@"%s", __PRETTY_FUNCTION__);

    UITouch *touch = [touches anyObject];
    CGPoint touchLocation = [touch locationInNode:self];
    BOOL isInside = NO;

    //NSLog(@"touchLocation %@", NSStringFromCGPoint(touchLocation) );
    //NSLog(@"self.position %@", NSStringFromCGPoint(self.position) );
    //NSLog(@"self.frame    %@", NSStringFromCGRect(self.frame) );
    //NSLog(@"self.size     %@", NSStringFromCGSize(self.size) );

    CGFloat atlX = fabsf(touchLocation.x);
    CGFloat atlY = fabsf(touchLocation.y);

    CGFloat lenX = self.size.width  / 2;
    CGFloat lenY = self.size.height / 2;

    if ( (atlX <= lenX) && (atlY <= lenY) ) {
        isInside = YES;
    }

    return isInside;
}

原始问题

这段代码我用于UIView的子类：

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    CGPoint touchLocation = [touch locationInView:self];
    BOOL isInside = [self pointInside:touchLocation withEvent:event];

    if (isInside)
    {
        if (NO == _isAlreadySelected)
        {
            [self setAppearanceSelected];
        }
        else
        {
            [self removeAppearanceSelected];
        }

       // more code
    }
}

现在我的类是SKSpriteNode的子类，所以我想使用相同的逻辑：

CGPoint touchLocation = [touch locationInView:self];
BOOL isInside = [self pointInside:touchLocation withEvent:event];

但它不起作用，我无法编译。（因为SKSpriteNode）不存在这些方法我设法将第一行更改为：

CGPoint touchLocation = [touch locationInNode:self];

问题
但是如何解决：

BOOL isInside = [self pointInside:touchLocation withEvent:event];

代表SKSpriteNode

更新目前的解决方案得到了@ duci9y的帮助

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"%s", __PRETTY_FUNCTION__);

    UITouch *touch = [touches anyObject];
    CGPoint touchLocation = [touch locationInNode:self];
    BOOL isInside = [self containsPoint:touchLocation];

    NSLog(@"touchLocation %@", NSStringFromCGPoint(touchLocation) );
    NSLog(@"self.position %@", NSStringFromCGPoint(self.position) );
    NSLog(@"self.frame    %@", NSStringFromCGRect(self.frame) );

    if (isInside)
    {
        NSLog(@"INSIDE");
        //self.texture = [SKTexture textureWithImage:_onImage];
    }
    else
    {
        NSLog(@"OUTSIDE");
        //self.texture = [SKTexture textureWithImage:_offImage];

    }
}

日志：

-[WOC_OnOffImageButton touchesBegan:withEvent:]
touchLocation {9.5, 18}
self.position {160, 440}
self.frame    {{138, 414.5}, {44, 51}}
OUTSIDE

对我来说，看起来SpriteKit和UIView之间的坐标系存在一些问题。例如它们不是从同一点开始的（从左下角到左上角）。

Answer 1

Read the docs.

BOOL isInside = [self containsPoint:touchLocation];

测试是touchesMoved：仍然在SKSpriteNode中

1 个答案: