得分系统不能正常工作

Question

我正在尝试在我的比赛中有一个得分系统。每次我打砖头时我都想把分数提高一个。我现在的代码在正确的位置上显示了分数，但是每次碰到砖时，它都不会增加。我真的不知道发生了什么，任何帮助将不胜感激。

我有我的课程扩展。 SKLabelNode * _lblScore;

这是为了当我的球接触到一块砖头。

- （空）didBeginContact：（SKPhysicsContact *）接触{

//create placeholder for the "non ball" object 
SKPhysicsBody *notTheBall; 

if (contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask) { 
    notTheBall = contact.bodyB; 
} else { 
    notTheBall = contact.bodyA; 
} 
if (notTheBall.categoryBitMask == brickCategory) { 
    //SKAction *playSFX = [SKAction playSoundFileNamed:@"brickhit.caf" waitForCompletion:NO]; 
    //[self runAction:playSFX]; 
    [_lblScore setText:[NSString stringWithFormat:@"%d", [GameState sharedInstance].score]]; 

    [notTheBall.node removeFromParent]; 
} 
} 

这是我把代码为得分标签。

-(instancetype)initWithSize:(CGSize)size { 
if (self = [super initWithSize:size]){ 
    self.backgroundColor = [SKColor colorWithRed:(29.0f/255) green:(29.0f/255) blue:(29.0f/255) alpha:1.0]; 


    //add physics body to scene 
    self.physicsBody = [SKPhysicsBody bodyWithEdgeLoopFromRect:self.frame]; 
    self.physicsBody.friction = 0.0f; 
    self.physicsBody.categoryBitMask = edgeCategory; 

    //change gravity 
    self.physicsWorld.gravity = CGVectorMake(0, 0); 
    self.physicsWorld.contactDelegate = self; 

    // Score 
    _lblScore = [SKLabelNode labelNodeWithFontNamed:@"ChalkboardSE-Bold"]; 
    _lblScore.fontSize = 30; 
    _lblScore.fontColor = [SKColor colorWithRed:85.0f/255.0f green:191.0f/255.0f blue:154.0f/255.0f alpha:1.0]; 
    _lblScore.position = CGPointMake(80, 20); 
    _lblScore.horizontalAlignmentMode = SKLabelHorizontalAlignmentModeRight; 
    [_lblScore setText:@"0"]; 
    [self addChild:_lblScore]; 



} 
return self; 
} 


+ (instancetype)sharedInstance 
{ 
static dispatch_once_t pred = 0; 
static GameState *_sharedInstance = nil; 

dispatch_once(&pred, ^{ 
    _sharedInstance = [[super alloc] init]; 
}); 
return _sharedInstance; 
} 

下面的代码我放在一个单独的类。它将数据保存在手机中，以便跟踪分数和高分。

- (id) init 
{ 
if (self = [super init]) { 
    // Init 
    _score = 0; 
    _highScore = 0; 

    // Load game state 
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; 
    id highScore = [defaults objectForKey:@"highScore"]; 
    if (highScore) { 
     _highScore = [highScore intValue]; 
    } 
} 
return self; 
} 

- (void) saveState 
{ 
// Update highScore if the current score is greater 
_highScore = MAX(_score, _highScore); 

// Store in user defaults 
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; 
[defaults setObject:[NSNumber numberWithInt:_highScore] forKey:@"highScore"]; 
[[NSUserDefaults standardUserDefaults] synchronize]; 
} 

Answer 1

您似乎没有在代码中的任何位置修改分数。最简单的方法是在设置标签的位置上方添加一行。

[GameState sharedInstance].score += 1; // Increment the score by one. 

[_lblScore setText:[NSString stringWithFormat:@"%d", [GameState sharedInstance].score]];