1
볼 노드를 표시하는 데 노력하고 있습니다. 볼 노드에 알파를 0.01로 설정하고 문서에서 fadeInWithDuration을 사용하여 알파 1.0을 만들어야합니다. 나는 중단 점을 넣고 메서드가 호출되고 있지만 볼 노드가 나타나지 않습니다.SKAction 메서드 fadeInWithDuration 작동하지 않음
-(void)addBallToFrame {
_ballNode = [SKSpriteNode spriteNodeWithImageNamed:@"Ball"];
SKAction *ballPosition = [SKAction runBlock:^(void) {
_ballNode.position = CGPointMake(CGRectGetMidX(self.frame), 295*ratio);
[_ballNode setZPosition:10];
[_ballNode setAlpha:0.01];
[self addChild:_ballNode];
}];
SKAction *timeForBallToAppear = [SKAction waitForDuration:1.5];
SKAction *changeAlpha = [SKAction fadeInWithDuration:0.5];
SKAction *ballAppearSequence = [SKAction sequence:@[timeForBallToAppear, ballPosition, changeAlpha]];
[self runAction:ballAppearSequence];
_ballNode.zPosition = 10;
[_ballNode setPhysicsBody:[SKPhysicsBody bodyWithCircleOfRadius:_ballNode.frame.size.height/2.0]];
_ballNode.physicsBody.categoryBitMask = BALL_CATEGORY;
_ballNode.physicsBody.collisionBitMask = WALL_CATEGORY | PLAYER_ONE_CATEGORY | PLAYER_TWO_CATEGORY | GOAL_POST_CATEGORY;
_ballNode.physicsBody.contactTestBitMask = GOAL_ONE_CATEGORY |GOAL_TWO_CATEGORY;
_ballNode.physicsBody.friction = 0.0;
_ballNode.physicsBody.linearDamping = 0.0;
}
-(void)removeBallFromFrame {
_ballNode.position = CGPointMake(-100, -100);
[self.ballNode removeFromParent];
}