通过用户触摸更改 SpriteNodes 坐标答案

【问题标题】：Change SpriteNodes coordinates with User touch通过用户触摸更改 SpriteNodes 坐标
【发布时间】：2014-05-10 13:09:07
【问题描述】：

我目前正在为iOS 平台在Xcode 中使用SpriteKit 编写一个小游戏。我编写了一个代码，在 2 条不同的“行”上添加了一些 SpriteNodes，因此一半的节点以 y 坐标 100 移动，其他节点以 y = 200 移动，它们都从左侧移动到对，这是一个无限循环。现在我希望用户可以触摸一个SpriteNode，然后将他的手指移动到另一个SpriteNode，但它必须位于另一条线上，然后移开他的手指，SpriteNode 和TOUCHBEGAN 应该改变它与TOUCHEND 节点的 y 坐标。我怎样才能做到这一点？

-(void)add
{
    SKSpriteNode *sprite2 = [SKSpriteNode spriteNodeWithImageNamed:@"test1.png"];
    sprite2.position = CGPointMake(-40, self.frame.size.height / 2);
    sprite2.size = CGSizeMake(100, 32);

    SKSpriteNode *sprite3 = [SKSpriteNode spriteNodeWithImageNamed:@"test.png"];
    sprite3.position = CGPointMake(-40, (self.frame.size.height / 2) + 90);
    sprite3.size = CGSizeMake(32, 100);

    [self addChild:sprite1];

    [self addChild:sprite2];

     SKAction *actionMove1 = [SKAction moveTo:CGPointMake(400, (self.frame.size.height / 2) - 90) duration:12];
    SKAction *actionMove2 = [SKAction moveTo:CGPointMake(200, (self.frame.size.height / 2)) duration:12];


    SKAction *actionMoveDone = [SKAction removeFromParent];
    [sprite1 runAction:[SKAction sequence:@[actionMove1, actionMoveDone]]];
    [sprite2 runAction:[SKAction sequence:@[actionMove2, actionMoveDone]]];


}

- (void)updateWithTimeSinceLastUpdate:(CFTimeInterval)timeSinceLast
{
    self.lastSpawnTime += timeSinceLast;
    if (self.lastSpawnTime > 2)
    {
        self.lastSpawnTime = 0;
        [self add];

    }
}

- (void)update:(CFTimeInterval)currentTime
{
    CFTimeInterval timeSinceLast = currentTime - self.lastUpdateTime;
    self.lastUpdateTime = currentTime;
    if (timeSinceLast > 2)
    {
        timeSinceLast = 1.0 /60.0;
        self.lastUpdateTime = currentTime;
    }

    [self updateWithTimeSinceLastUpdate:timeSinceLast];

}

【问题讨论】：

标签： ios drag-and-drop draggable sprite-kit

【解决方案1】：

你必须继承 SkSpriteNode：

要检测 TouchEvent，您必须将“userInteractionEnabled”设置为“YES”
要对 TouchEvents 做出反应，请实现适合您需要的触摸方法：

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{}

在这个方法中你可以改变你的精灵的坐标

【讨论】：

谢谢，但我不知道在这个方法里面写什么！

【解决方案2】：

在你的sksence中添加这些功能

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent )event { / 触摸开始时调用 */

    UITouch *touch = [touches anyObject];
    CGPoint location = [touch locationInNode:self];
    SKNode *node = [self nodeAtPoint:location];
    if([node.name isEqualToString:@"plane"])
    {
        NSLog(@"_______touch ended");
        //x and y position of object at Scene
        NSLog(@"%f",node.position.x);
        NSLog(@"%f",node.position.y);
        NSLog(@"%@",node);
    }
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    /* Called when a touch begins */

    UITouch *touch = [touches anyObject];
    CGPoint location = [touch locationInNode:self];
    SKNode *node = [self nodeAtPoint:location];
    if([node.name isEqualToString:@"plane"])
    {
        NSLog(@"_______touch mobing");

    }
}


-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    /* Called when a touch begins */

    UITouch *touch = [touches anyObject];
    CGPoint location = [touch locationInNode:self];
   SKNode *node = [self nodeAtPoint:location];
    if([node.name isEqualToString:@"plane"])
    {
                NSLog(@"______touch begin");
        //x and y position of object at Scene
        NSLog(@"%f",node.position.x);
        NSLog(@"%f",node.position.y);
        NSLog(@"%@",node);
    }
}

【讨论】：