Question

我试图在游戏中使用评分系统。我想每次打砖时都把分数提高一分。我现在的代码显示了正确位置的分数，但每次我打砖时它根本没有增加。我真的不知道发生了什么，我们将非常感谢任何帮助。

我的班级扩展名。 SKLabelNode * _lblScore;

这是因为我的球与砖块接触。

- （void）didBeginContact：（SKPhysicsContact *）contact {

//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];
}
}

这是我为分数标签添加代码的地方。

-(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中。它将数据保存在手机中，以便跟踪得分和高分。

- (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。修改此方法的最简单方法是在您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]];

得分系统无效

1 个答案: