游戏场景不显示

Question

我的游戏运行菜单场景，但是当我按下播放按钮并转换到主场景时，所有我可以看到的都是灰色屏幕。

继承人我的代码：Myscene.h

#import <SpriteKit/SpriteKit.h> 

@interface MyScene : SKScene 
@property (strong, nonatomic) SKLabelNode *scoreLabel; 
@property (nonatomic) NSInteger score; 
@property (nonatomic) BOOL gameOver; 
@property SKEmitterNode *shatter; 

typedef NS_ENUM(NSInteger, SpriteType) { 
    SpriteTypeBackground, 
    SpriteTypeSquare 
}; 

Myscene.m

#import "MyScene.h" 

@interface MyScene() 

@property SKSpriteNode *background; 
@property SKSpriteNode *square; 

@end 

@implementation MyScene 
#define kNumberOfColors  2 //Setting total number of possible colors 



-(id)initWithSize:(CGSize)size { 

    if (self = [super initWithSize:size]) { 
     /* Setup your scene here */ 
     [self runAction:[SKAction repeatActionForever: [SKAction sequence:@[[SKAction                    performSelector:@selector(addSquareAndBackground) onTarget:self] ]]]]; 

     //Score Label 
     float margin = 10; 
     self.scoreLabel = [SKLabelNode labelNodeWithFontNamed:@"Chalkduster"]; 
     self.scoreLabel.text = @"Score: 0"; 
     self.scoreLabel.fontSize = [self convertFontSize:14]; 
     self.scoreLabel.zPosition = 4; 
     self.scoreLabel.horizontalAlignmentMode = SKLabelHorizontalAlignmentModeLeft; 
     self.scoreLabel.position = CGPointMake(margin, margin); 
     [self addChild:self.scoreLabel]; 



    } 
    return self; 
} 

- (float)convertFontSize:(float)fontSize 
{ 
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) { 
     return fontSize * 2; 
    } else { 
     return fontSize; 
    } 
} 


-(void)addSquareAndBackground { 
    _background = [self createSpriteWithType:SpriteTypeBackground]; 
    _square = [self createSpriteWithType:SpriteTypeSquare]; 
} 

-(void)removeSquareAndBackground { 
    [_background removeFromParent]; 
    [_square removeFromParent]; 
} 

-(SKSpriteNode *) createSpriteWithType:(SpriteType)type { 
    // Select a color randomly 
    NSString *colorName = [self randomColorName]; 
    SKSpriteNode *sprite; 
    if (type == SpriteTypeBackground) { 
     NSString *name = [NSString stringWithFormat:@"%@Outline",colorName]; 
     sprite = [SKSpriteNode spriteNodeWithImageNamed:name]; 
     sprite.name = name; 
     sprite.size = CGSizeMake(CGRectGetHeight(self.frame), CGRectGetWidth(self.frame)); 
    } 
    else { 
     sprite = [SKSpriteNode spriteNodeWithImageNamed:colorName]; 
     sprite.name = [NSString stringWithFormat:@"%@Sprite",colorName]; 
     sprite.size = CGSizeMake(50, 50); 
    } 
    sprite.position = CGPointMake(CGRectGetMidX(self.frame),CGRectGetMidY(self.frame)); 
    [self addChild:sprite]; 

    return sprite; 
} 

- (NSString *) randomColorName { 
    NSString *colorName; 
    switch (arc4random_uniform(kNumberOfColors)) { 
     case 0: 
      colorName = @"blue"; 
      break; 
     case 1: 
      colorName = @"pink"; 
      break; 
      // Add more colors here 
     default: 
      break; 
    } 
    return colorName; 
} 

-(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]; 

    NSString *pinkShatterPath = [[NSBundle mainBundle] pathForResource:@"pinkShatter" ofType:@"sks"]; 
    SKEmitterNode *pinkShatter = [NSKeyedUnarchiver unarchiveObjectWithFile:pinkShatterPath]; 
    pinkShatter.particlePosition = CGPointMake(CGRectGetMidX(self.frame),CGRectGetMidY(self.frame)); 


    if (node == _square) { 
     // Extract the color name from the node name 
     NSArray *squareNameParts = [node.name componentsSeparatedByCharactersInSet:[NSCharacterSet uppercaseLetterCharacterSet]]; 
     // Extract the color name from the node name 
     NSArray *backgroundNameParts = [_background.name componentsSeparatedByCharactersInSet:[NSCharacterSet uppercaseLetterCharacterSet]]; 
     // Compare if the colors match 
     if ([backgroundNameParts[0] isEqualToString: squareNameParts[0]]) { 
      //Add SKAction to add 1 to score label 
      [SKAction performSelector:@selector(removeSquareAndBackground) onTarget:self]; 
      [self addChild:pinkShatter]; 
      self.score += 10; 

      //NSLog(@"Score"); for console error detection 
     } else { 
      //NSLog(@"Lost"); //Add SKAction to display game-over menu 
      SKLabelNode *gameOverLabel = [SKLabelNode labelNodeWithFontNamed:@"Chalkduster"]; 
      gameOverLabel.text = @"You Lose!!!!!"; 
      gameOverLabel.fontSize = 20; 
      gameOverLabel.zPosition = 4; 
      gameOverLabel.position = CGPointMake(CGRectGetMidX(self.frame), 
               CGRectGetMidY(self.frame)); 

      [gameOverLabel setScale:0.1]; 

      [self addChild:gameOverLabel]; 
      [gameOverLabel runAction:[SKAction scaleTo:1.0 duration:0.5]]; 

      self.gameOver = YES; 
      return; 
     } 
    } 


} 

-(void)update:(CFTimeInterval)currentTime { 
    /* Called before each frame is rendered */ 
    [self.scoreLabel setText:[NSString stringWithFormat:@"Score: %ld", (long)self.score]]; 
} 

@end 

之前，我添加的菜单场景它除了我似乎无法得到它的工作后，现在工作得很好。

Answer 1

你知道你在做什么吗？

[self runAction: 
[SKAction repeatActionForever: 
    [SKAction sequence:@[ 
    [SKAction performSelector:@selector(addSquareAndBackground) onTarget:self] 
    ]]]]; 

所有序列的第一个完全是多余的，因为你没有实际测序多个动作，你只有一个：

[self runAction: 
[SKAction repeatActionForever: 
    [SKAction performSelector:@selector(addSquareAndBackground) onTarget:self] 
    ]]; 

而且重复performSelector会导致选择与没有重复运行延迟。 performSelector操作没有持续时间，它会立即运行。重复它永远会创建背景精灵，每帧一个，或者，根据SK如何解释这个，甚至可能无限循环地运行选择器直到应用程序崩溃。