Sprite Kit-將對象移動到觸摸位置

Question

我的場景中有一個物體。 當我觸摸屏幕時，我希望對象的y位置成為觸摸的y位置。 為此，我有以下代碼：

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

    SKNode *player = [self childNodeWithName:@"player"];

    UITouch *touch = [touches anyObject];
    CGPoint positionInScene = [touch locationInNode:self];
    player.position = CGPointMake(player.position.x, positionInScene.y);
}

它可以與此代碼一起使用，但是如何使對象以穩定的速度移動到觸摸y位置？ 因此，與其以預定的速度移至該位置，而不必跳至觸摸y位置。

Answer 1

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

    SKNode *player = [self childNodeWithName:@"player"];

    UITouch *touch = [touches anyObject];
    CGPoint positionInScene = [touch locationInNode:self];

  // Determine speed
int minDuration = 2.0;
int maxDuration = 4.0;
int rangeDuration = maxDuration - minDuration;
int actualDuration = (arc4random() % rangeDuration) + minDuration;

// Create the actions
SKAction * actionMove = [SKAction moveTo:CGPointMake(player.position.x, positionInScene.y); duration:actualDuration];
[player runAction:actionMove];

}