测试是 touchesMoved：仍在 SKSpriteNode 内答案

【问题标题】：Test is touchesMoved: still inside SKSpriteNode测试是 touchesMoved：仍在 SKSpriteNode 内
【发布时间】：2014-07-25 17:47:25
【问题描述】：

更新
我已经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

这段代码用于我的 UIView 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];

为SKSpriteNode

更新在@duci9y 的帮助下当前的解决方案

- (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

在我看来，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（左下角与左上角）。

【问题讨论】：

标签： ios objective-c uiview sprite-kit

【解决方案1】：

Read the docs.

BOOL isInside = [self containsPoint:touchLocation];

【讨论】：

这个方法存在，当我添加它时，代码可以编译，但我发现了新问题。使用当前代码，每次触摸都在SKSpriteNode之外，即使它在里面。我认为问题出在[self containsPoint:touchLocation]，因为之前对 UIView 的调用是[self pointInside:touchLocation withEvent:event];，它使用了这个event。知道如何检测吗？
@WebOrCode 记录节点的尺寸和位置以及locationInNode: 返回的点，并使用结果更新您的问题。