Question

我有一个启用了用户交互的SKNode，我正在添加一个SKEmitterNode，我希望仅为孩子禁用用户交互。此代码不起作用。

SKNode* parentNode = [[SKNode alloc] init];
parentNode.userInteractionEnabled = YES;
NSString* path = [[NSBundle mainBundle] pathForResource:@"ABCDEFG" ofType:@"xyz"];
SKEmitterNode* childNode = [NSKeyedUnarchiver unarchiveObjectWithFile:path];
childNode.userInteractionEnabled = NO;
[parentNode addChild:childNode];

我还尝试在添加到父级后将用户交互设置为NO。这是可能的还是我需要以某种方式将发射器添加到父母的父级？

Answer 1

我确信有更好的方式（希望有!!），但这是一个开始。

也许这是应该怎么做的。问题是如果你有一个sprite上的发射器，触摸不会通过（在我的测试中没有）。

  -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    for (UITouch *touch in touches) {

        UITouch *touch = [touches anyObject];
        CGPoint positionInScene = [touch locationInNode:self];
        SKSpriteNode *touchedNode = (SKSpriteNode *)[self nodeAtPoint:positionInScene];

        if (touchedNode.userInteractionEnabled) {
            NSLog(@"Name of node touched %@", touchedNode.name);
        }
        else {
            NSLog(@"Can't touch this! %@", touchedNode.name);
        }
    }
}

Answer 2

我通过从父母发送通知向其父级发送通知来实现此目的。父母中的函数生成发射器，禁用用户交互并将发射的目标设置为父级。也许有些代码是有序的。

在父母：

UITouch *touch = [touches anyObject];
// to get the location in the scene
CGPoint location = [touch locationInNode:[self parent]];
NSDictionary* locationDic = [NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects: [NSNumber numberWithFloat:location.x],                                                                                          
                                                                                           [NSNumber numberWithFloat:location.y],
                                                                                           nil]
                                                        forKeys:[NSArray arrayWithObjects:@"loc_x", @"loc_y", nil]];
[[NSNotificationCenter defaultCenter] postNotificationName:@"Ntf_SpawnParticles"
                                                    object:nil
                                                  userInfo:locationDic];

在父母的父母（场景）中，注册事件：

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(spawnParticles:)
                                             name:@"Ntf_SpawnParticles"
                                           object:nil];

仍然在父母的父级（场景）中，实现“spawnParticles”：

- (void)spawnRockDebris:(NSNotification *)ntf
{
    float x = [[[ntf userInfo] valueForKey:@"loc_x"] floatValue];
    float y = [[[ntf userInfo] valueForKey:@"loc_y"] floatValue];
    CGPoint location = CGPointMake(x, y);

    NSString* particlePath = [[NSBundle mainBundle] pathForResource:@"CoolParticles" ofType:@"sks"];
    SKEmitterNode* particleEmitterNode = [NSKeyedUnarchiver unarchiveObjectWithFile:particlePath];
    // set up other particle properties here
    particleEmitterNode.position = location;
    particleEmitterNode.userInteractionEnabled = NO;
    particleEmitterNode.targetNode = [self childNodeWithName:@"particleTargetNode"];
    [self addChild:particleEmitterNode];
}

如何在父节点在SpriteKit中启用子节点时关闭子节点的用户交互

2 个答案: