Question

我正在创建一个应用程序，其中的对象从屏幕顶部掉落。这些对象是spriteNodes，使用方法- (void)generateNodes生成。当您点击屏幕时，会创建一个touchPointer节点并检测您是否触摸了spriteNode。这是通过didBeginContact方法完成的。我有触摸的检测，但是，当我尝试向对象添加死亡动画时，存在问题。如果我点击一个对象并开始它的死亡动画，那么我点击另一个新生成的对象。之前的死亡动画继续使用新生成的对象。因此，不是启动新生成的对象自己的死亡动画 - 基本上淡出，它将继续从该对象完成后的前一个对象的死亡动画。

示例：

点击0.5时，

firstObject alpha - ＆gt; 0

==第一个对象被点击，而firstObject仍在运行死亡动画==

点击时，

secondObject alpha为0.2 - ＆gt; 0

这是因为当我点击secondObject时，它会继续第一个对象的动画。我希望它能够成为secondObject开始自己动画的地方，它应该从0.5

的alpha开始

代码didBeginContact

if([contact.bodyA.node.name isEqualToString:@"object"] && [contact.bodyB.node.name isEqualToString:@"touchPointer"]){
        //Object Death Animation Actions
        int randObjectMovement = (arc4random()%2) + 1;

        touchedObject = [objects objectAtIndex:0];

        touchedObject.alpha = 0.5;

        if(randObjectMovement == 1){
            touchedObject.physicsBody.velocity = CGVectorMake(0, 0);
            [touchedObject.physicsBody applyImpulse:CGVectorMake(-10, 18)];
            NSLog(@"Impluse completed");
        }else{
            touchedObject.physicsBody.velocity = CGVectorMake(0, 0);
            [touchedObject.physicsBody applyImpulse:CGVectorMake(10, 18)];
            NSLog(@"Impluse completed");

        }

        objectFadeOut = [SKAction fadeAlphaTo:0 duration:0.75];
        objectRemove = [SKAction removeFromParent];
        objectDeathRotation = [SKAction rotateByAngle:M_PI*2 duration:3];

        [touchedObject runAction:objectDeathRotation completion:^{
            NSLog(@"objectDeathRotation completed");
        }];
        [touchedObject runAction:objectFadeOut completion:^{
            NSLog(@"objectFadeOut and Removal completed");
            [touchedObject runAction:objectRemove];
        }];
    }

代码generateObjects

- (void)generateObject{
    //Object Texture delcaration
    if ([self generateObjectType] <= 100 && [self generateObjectType] > 20){
        objectTexture = [SKTexture textureWithImageNamed:@"Object_N"];
    }else if([self generateObjectType] <= 20 && [self generateObjectType] > 5){
        objectTexture = [SKTexture textureWithImageNamed:@"Object_B"];
    }else{
        objectTexture = [SKTexture textureWithImageNamed:@"Object_G"];
    }
    objectTexture.filteringMode = SKTextureFilteringNearest;

    //Object Actions
    objectRotation = [SKAction rotateByAngle:M_PI*2 duration:1];

    //Object Sprite declaration
    objectSprite = [SKSpriteNode spriteNodeWithTexture:objectTexture];
    objectSprite.position = [self generateObjectPosition];
    objectSprite.zPosition = 3;
    objectSprite.size = CGSizeMake(30, 30);
    [objectSprite runAction:objectRotation];

    objectSprite.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:objectSprite.size];
    objectSprite.name = @"object";
    objectSprite.physicsBody.categoryBitMask = objectCategory;
    objectSprite.physicsBody.collisionBitMask = groundCategory;
    objectSprite.physicsBody.contactTestBitMask = groundCategory | touchCategory;

    [objects insertObject:objectSprite atIndex:0];
    [self addChild:objectSprite];

}

顺便说一句，对象是一个NSMutableArray。

请帮忙！

Answer 1

为什么不使用联系人中的节点：

SKSpriteNode *touchedObject = (SKSpriteNode*)contact.bodyA.node;

这会使节点参与碰撞，您可以对其执行操作，不需要阵列。

<强>更新

使用操作的本地实例：

SKAction *objectFadeOutLocal = [SKAction fadeAlphaTo:0 duration:0.75];
SKAction *objectRemoveLocal = [SKAction removeFromParent];
SKAction *objectDeathRotationLocal = [SKAction rotateByAngle:M_PI*2 duration:3];

如何在SpriteKit中对先前生成的SpriteNodes运行操作

1 个答案: