Question

我有一排小行星在屏幕左侧飞向我的角色。如果他们打了我的角色游戏。如果它没有击中我的角色并到达屏幕的末尾，我希望得分系统在这种情况下将分数增加1。我正在使用xcode 5.我怎样才能实现这一目标。此代码显示了小行星的移动

 double curTime = CACurrentMediaTime();
      if (curTime > _nextAsteroidSpawn) {
    //NSLog(@"spawning new asteroid");
    float randSecs = [self randomValueBetween:0.20 andValue:1.0];
    _nextAsteroidSpawn = randSecs + curTime;

    float randY = [self randomValueBetween:0.0 andValue:self.frame.size.height];
    float randDuration = [self randomValueBetween:2.0 andValue:10.0];

    SKSpriteNode *asteroid = [_asteroids objectAtIndex:_nextAsteroid];
    _nextAsteroid++;

    if (_nextAsteroid >= _asteroids.count) {
        _nextAsteroid = 0;
    }

    [asteroid removeAllActions];
    asteroid.position = CGPointMake(self.frame.size.width+asteroid.size.width/2, randY);
    asteroid.hidden = NO;

    CGPoint location = CGPointMake(-self.frame.size.width-asteroid.size.width, randY);

    SKAction *moveAction = [SKAction moveTo:location duration:randDuration];
    SKAction *doneAction = [SKAction runBlock:(dispatch_block_t)^() {
        //NSLog(@"Animation Completed");
        asteroid.hidden = YES;

    }];

    SKAction *moveAsteroidActionWithDone = [SKAction sequence:@[moveAction, doneAction ]];
    [asteroid runAction:moveAsteroidActionWithDone withKey:@"asteroidMoving"];

Answer 1

只需更改完成的操作完成块：

SKAction *doneAction = [SKAction runBlock:(dispatch_block_t)^() {
    //NSLog(@"Animation Completed");
    asteroid.hidden = YES;
    ++myAwesomeScore;
}];

我无法看到你在小行星与玩家发生碰撞时如何摧毁小行星，但是如果你只是隐藏它们而不是完全删除它们（因此仍然会击中runBlock。然后只需修改它有以下几点：

SKAction *doneAction = [SKAction runBlock:(dispatch_block_t)^() {
    //NSLog(@"Animation Completed");
    asteroid.hidden = YES;
    if (asteroid.isNotDead) ++myAwesomeScore;
}];

评分系统xcode 5精灵套件

1 个答案: