iOS 7:SpriteKit手势识别器

我有一个场景，我需要双击显示另一个场景，但它不起作用（（如果我犯了错误，或者我知道出了什么问题？ 该守则：

-(id)initWithSize:(CGSize)size {
if (self = [super initWithSize:size]) {
    /* Setup your scene here */

    self.backgroundColor = [SKColor colorWithRed:0.15 green:0.15 blue:0.3 alpha:1.0];

    SKLabelNode *myLabel = [SKLabelNode labelNodeWithFontNamed:@"Chalkduster"];

    myLabel.text = @"Kill Them All!";
    myLabel.fontSize = 30;
    myLabel.position = CGPointMake(CGRectGetMidX(self.frame),
            CGRectGetMidY(self.frame));
    myLabel.alpha = -2;
    SKAction *fadeIn = [SKAction fadeInWithDuration:9.0];
    [myLabel runAction:fadeIn];
    [self addChild:myLabel];


    UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doubleTap)];
    doubleTap.numberOfTapsRequired = 2;

    [self.view addGestureRecognizer:doubleTap];
}
return self;}

-(void)doubleTap{
NewScene *newScene = [[NewScene alloc] initWithSize:self.view.bounds.size];
SKTransition *doors = [SKTransition doorsOpenVerticalWithDuration:1.0];
[self.view presentScene:newScene transition:doors];}

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如果通过以下方式在场景中委派UIView：

-(id)initWithSize:(CGSize)size andWithView:(UIView *)view

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有效！=）

嘿，你介意解释一下你是怎么做到的吗？我遇到了同样的问题，但不明白你是怎么解决的。谢谢！