添加秒計時器iOS遊戲精靈套件

Question

我想添加幾秒鐘倒計時計時每當敵人和玩家節點接觸。 當玩家達到某個特定點時，我希望玩家轉到另一個級別。我正在發送部分代碼。有誰能幫我解決這個問題嗎？順便說一句，因爲我是編程新手，我的代碼有點難以閱讀。對不起。 感謝

 -(void)update:(CFTimeInterval)currentTime{ 

    if (startGamePlay){ 
    startTime = currentTime; 
    startGamePlay = NO; 
} 

countDownInt = 10.0 - (int)(currentTime-startTime); 

if(countDownInt > 0){ //if counting down to 0 show counter 
    countDown.text = [NSString stringWithFormat:@"%i", countDownInt]; 
} 


    else if (countDownInt == 0){ 
     countDown.text =@"0"; 
     Level2 *level2 = [Level2 sceneWithSize:self.frame.size]; 
     SKTransition *transition = [SKTransition fadeWithDuration:0.5]; 
     [self.view presentScene:level2 transition:transition]; 
    } 
} 



    - (void) didBeginContact:(SKPhysicsContact *)contact { 
SKPhysicsBody *firstBody, *secondBody; 

if (contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask) { 
    firstBody = contact.bodyA; 
    secondBody = contact.bodyB; 
} else { 
    firstBody = contact.bodyB; 
    secondBody = contact.bodyA; 
} 


if (firstBody.categoryBitMask == CollisionCategoryBrick && secondBody.categoryBitMask == CollisionCategoryShark) { 
    NSLog(@"BRICK"); 

    [contact.bodyB.node removeFromParent]; 

} else if (firstBody.categoryBitMask == CollisionCategoryWaterBall && secondBody.categoryBitMask == CollisionCategoryShark) { 
    NSLog(@"BALL"); 
    countDownInt = [countDown.text intValue]; 
    [contact.bodyA.node removeFromParent]; 
    [self addPoints:PointsPerHit]; 

    if (![ self childNodeWithName:@"WATERBALLTL"]) { 
     [self addWaterBallTopLeft]; 
    } 
    if (![ self childNodeWithName:@"WATERBALLTR"]) { 
     [self addWaterBallTopRight]; 
    } 
    if (![ self childNodeWithName:@"WATERBALLBL"]) { 
     [self addWaterBallBottomLeft]; 
    } 
    if (![ self childNodeWithName:@"WATERBALLBR"]) { 
     [self addWaterBallBottomRight]; 
    } 
} 
    NSLog(@"%lu", (unsigned long)[self.children count]); 
} 





#import "HudNode.h" 

    @implementation HudNode 

{ 
    SKLabelNode *countDown; 
    BOOL startGamePlay; 
    NSTimeInterval startTime; 
} 

    + (instancetype) hudAtPosition:(CGPoint)position inFrame:(CGRect)frame { 
    HudNode *hud = [self node]; 
    hud.position = position; 
    hud.zPosition = 10; 
    hud.name = @"HUD"; 



    SKLabelNode *scoreLabel = [SKLabelNode labelNodeWithFontNamed:@"Futura-CondensedExtraBold"]; 
    scoreLabel.name = @"Score"; 
    scoreLabel.text = @"0"; 
scoreLabel.fontSize = 24; 
scoreLabel.horizontalAlignmentMode = SKLabelHorizontalAlignmentModeRight; 
scoreLabel.position = CGPointMake(frame.size.width-20, -10); 
scoreLabel.zPosition = 12; 
[hud addChild:scoreLabel]; 
     SKLabelNode *countDown = [SKLabelNode labelNodeWithFontNamed:@"Futura-Medium"]; 
     countDown.fontSize = 50; 
     countDown.position = CGPointMake(30, -10); 
     countDown.verticalAlignmentMode = SKLabelVerticalAlignmentModeCenter; //good for  positioning with other sprites 
     countDown.fontColor = [SKColor whiteColor ]; 
     countDown.name = @"countDown"; 
     countDown.zPosition = 100; 
     [hud addChild:countDown]; 


return hud; 
} 

    - (void) addPoints:(NSInteger)points { 
self.score += points; 

SKLabelNode *scoreLabel = (SKLabelNode *) [self childNodeWithName:@"Score"]; 
scoreLabel.text = [NSString stringWithFormat:@"Score:%li", (long)self.score]; 

} 

Answer 1

創建一個布爾標誌，更新方法檢查，看它是否應該添加秒。

添加以下變量，並設置self.addSeconds = NO;開始：

@property (nonatomic) BOOL addSeconds; 

設置在您的播放器擊中你的敵人的方法self.addSeconds =YES;：

添加以下內容更新的開始：

if(self.addSeconds == YES) 
{ 
    CountDownInt+= 5 //Change this to add as many seconds as you want 
    self.addSeconds=NO; 
} 

這應該可以做到。