Question

我正在使用适用于iOS的Sprite Kit。所以我有Sprite Kit的按钮类的这一部分：

#pragma Touch Events setup
- (void) setTouchDownAction:(SEL)action OnTarget:(id)target
{
    touchDownTarget = target;
    touchDownAction = action;
}

- (void) setTouchUpAction:(SEL)action OnTarget:(id)target
{
    touchUpTarget = target;
    touchUpAction = action;
}

#pragma Touch Handling
- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    CGPoint touchPoint = [touch locationInNode:self.parent];


    if(CGRectContainsPoint(self.frame, touchPoint))
        [self setSelected:YES];

    if(touchDownTarget && touchDownAction && CGRectContainsPoint(self.frame, touchPoint))
    {

        objc_msgSend(touchDownTarget, touchDownAction);
    }
}

- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    CGPoint touchPoint = [touch locationInNode:self.parent];

    if(touchUpTarget && touchUpAction && CGRectContainsPoint(self.frame, touchPoint))
    {
        [self setSelected:NO];
        objc_msgSend(touchUpTarget, touchUpAction);
    }
}

我创建了这样一个类的对象：

SKButton *onePlayerButton = [[SKButton alloc] initWithTexture:menuButtonTexture selectedTexture:menuButtonSelectedTexture size:CGSizeMake(buttonWidth, buttonWidth / 6)];
onePlayerButton.position = CGPointMake(self.size.width / 2, self.size.height - 150);
onePlayerButton.color = [UIColor blueColor];
onePlayerButton.colorBlendFactor = 0.4;
[onePlayerButton setTitle:@"1 Player"];
[onePlayerButton setTouchUpAction:@selector(onePlayerButtonClicked) OnTarget:self];
[self addChild:onePlayerButton];

如果我创建同一个类的第二个对象并点击第二个或第一个按钮，则两个对象都会响应点击。

在场景中，我得到了这样的触摸事件：

- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [onePlayerButton touchesBegan:touches withEvent:event];
    [multiplayerButton touchesBegan:touches withEvent:event];
}
- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    [onePlayerButton touchesEnded:touches withEvent:event];
    [multiplayerButton touchesEnded:touches withEvent:event];
}

为什么两个对象都会响应？

谢谢！

Answer 1

问题在于，无论用户在哪里触摸，您都会同时向按钮发送触摸。

尝试为您的按钮添加名称，如下所示：

onePlayerButton.name = @"one_player";
multiplayerButton.name = @"mul_player";

现在在touchesBegan中仅在用户触摸按钮时添加事件

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    CGPoint touchLocation = [touch locationInNode:self];
    SKNode *node = [self nodeAtPoint:touchLocation];

    if ([node.name isEqualToString:@"one_player"])
    {
        [onePlayerButton touchesBegan:touches withEvent:event];
    }

    else if ([node.name isEqualToString:@"mul_player"])
    {
        [multiplayerButton touchesBegan:touches withEvent:event];
    }
}

这应该对你有用，已经过测试。

祝你好运！

Sprite Kit中同一类的多个对象的奇怪行为

1 个答案: