Question

我正试图找到一种奇怪行为的原因。我的SpriteKit场景有一个SKLabelNode作为属性。 SKLabelNode在名为levelSelected：

的方法中初始化

 -(void)levelSelected{
    SKSpriteNode* bar = [SKSpriteNode spriteNodeWithColor:[UIColor colorWithHue:0.566f saturation:0.787f brightness:0.792f alpha:1] size:CGSizeMake(self.frame.size.width,60)];
    bar.anchorPoint = CGPointMake(0, 0);
    bar.position = CGPointMake(0, 50);
    float space = (self.size.width - 45*6) / 7;
    SKSpriteNode* letterBox = [SKSpriteNode spriteNodeWithImageNamed:@"letter_box_def"];
    letterBox.anchorPoint = CGPointMake(0.5, 0.5);
    letterBox.position = CGPointMake((space+((space + 45)*2)+22.5), 30);
    [bar addChild:letterBox];
    self.gl2 = [SKLabelNode labelNodeWithFontNamed:@"Arial"];
    self.gl2.fontColor = [SKColor blackColor];
    self.gl2.verticalAlignmentMode = SKLabelVerticalAlignmentModeCenter;
    self.gl2.fontSize = 30;
    self.gl2.text = @"";
    NSLog(@"%@", self.gl2);
    [letterBox addChild:self.gl2];
    [self addChild:bar];
    self.gl2.text = @"D";
    }

正如所料，在运行时，节点显示“D”。我的触摸方法如下：

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    NSLog(@"Called touchesBegan");
    NSLog(@"Node : %@", self.gl2);
    NSLog(@"Text : %@", self.gl2.text);
    self.gl2.text = @"k";
    NSLog(@"Node : %@", self.gl2);
    NSLog(@"Text : %@", self.gl2.text);
    }

现在，触摸会使标签从屏幕上消失。日志显示：

2014-08-14 06:15:34.841 Guess[3125:607363] Called touchesBegan
2014-08-14 06:15:34.842 Guess[3125:607363] Node : <SKLabelNode> name:'(null)' text:'D' fontName:'Arial' position:{0, 0}
2014-08-14 06:15:34.843 Guess[3125:607363] Text : D
2014-08-14 06:15:34.846 Guess[3125:607363] Node : <SKLabelNode> name:'(null)' text:'k' fontName:'Arial' position:{0, 0}
2014-08-14 06:15:34.847 Guess[3125:607363] Text : k

我尝试过的事情是使用另一种方法，从levelSelected方法调用：

-(void)levelSelected{
    SKSpriteNode* bar = [SKSpriteNode spriteNodeWithColor:[UIColor colorWithHue:0.566f saturation:0.787f brightness:0.792f alpha:1] size:CGSizeMake(self.frame.size.width,60)];
    bar.anchorPoint = CGPointMake(0, 0);
    bar.position = CGPointMake(0, 50);
    float space = (self.size.width - 45*6) / 7;
    SKSpriteNode* letterBox = [SKSpriteNode spriteNodeWithImageNamed:@"letter_box_def"];
    letterBox.anchorPoint = CGPointMake(0.5, 0.5);
    letterBox.position = CGPointMake((space+((space + 45)*2)+22.5), 30);
    [bar addChild:letterBox];
    self.gl2 = [SKLabelNode labelNodeWithFontNamed:@"Arial"];
    self.gl2.fontColor = [SKColor blackColor];
    self.gl2.verticalAlignmentMode = SKLabelVerticalAlignmentModeCenter;
    self.gl2.fontSize = 30;
    self.gl2.text = @"";
    NSLog(@"%@", self.gl2);
    [letterBox addChild:self.gl2];
    [self addChild:bar];
    self.gl2.text = @"D";
    [self touchedSomething];
}
-(void)touchedSomething {
    NSLog(@"Called touchedSomething");
    NSLog(@"Node : %@", self.gl2);
    NSLog(@"Text : %@", self.gl2.text);
    self.gl2.text = @"k";
    NSLog(@"Node : %@", self.gl2);
    NSLog(@"Text : %@", self.gl2.text);
}

这非常有效，D被k替换，产生日志：

2014-08-14 06:20:09.934 Guess[3132:608100] Called touchedSomething
2014-08-14 06:20:09.935 Guess[3132:608100] Node : <SKLabelNode> name:'(null)' text:'D' fontName:'Arial' position:{0, 0}
2014-08-14 06:20:09.935 Guess[3132:608100] Text : D
2014-08-14 06:20:09.938 Guess[3132:608100] Node : <SKLabelNode> name:'(null)' text:'k' fontName:'Arial' position:{0, 0}
2014-08-14 06:20:09.939 Guess[3132:608100] Text : k

但是如果我从levelSelected中删除[self touchingSomething]调用并将其添加到touchesBegan，它将无效，标签将再次从屏幕上消失。

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    NSLog(@"Called touchesBegan");
    [self touchedSomething];
}

-(void)touchedSomething {
    NSLog(@"Called touchedSomething");
    NSLog(@"Node : %@", self.gl2);
    NSLog(@"Text : %@", self.gl2.text);
    self.gl2.text = @"k";
    NSLog(@"Node : %@", self.gl2);
    NSLog(@"Text : %@", self.gl2.text);
}

2014-08-14 06:24:49.492 Guess[3145:609098] Called touchesBegan
2014-08-14 06:24:49.493 Guess[3145:609098] Called touchedSomething
2014-08-14 06:24:49.494 Guess[3145:609098] Node : <SKLabelNode> name:'(null)' text:'D' fontName:'Arial' position:{0, 0}
2014-08-14 06:24:49.494 Guess[3145:609098] Text : D
2014-08-14 06:24:49.498 Guess[3145:609098] Node : <SKLabelNode> name:'(null)' text:'k' fontName:'Arial' position:{0, 0}
2014-08-14 06:24:49.498 Guess[3145:609098] Text : k

感谢您的帮助！

Answer 1

好吧，我能够解决它（有点）。为标签定义zPosition修复它。为什么它在某些情况下正常工作而在其他情况下不能正常工作仍然是个谜。

SKLabelNode在触摸时更新

1 个答案: