使用块的Sprite-kit动作

Question

是）我有的：

• 您单击并将球移动到该位置。
• 屏幕在上下之间水平分割。
• 假设球在下方，你不能点击下方让它移动。您必须单击屏幕的顶部。关于上部或下部，这翻转。

我想要的是：

• x坐标根本不会改变。
• 当球击中顶部时，它会改变方向并在没有点击的情况下向下移动
• 删除UITouch位置变量
• 上下支撑系统停留 每件事都有助于非常感谢你。

  -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
      /* Called when a touch begins */
      //SKAction *action = [SKAction rotateByAngle:M_PI duration:1];
      //[sprite runAction:[SKAction repeatActionForever:action]];
  
      for (UITouch *touch in touches) {
          location = [touch locationInNode:self];
      }
  
      float ballVelocity = self.frame.size.height/3.0;
      CGPoint moveDifference = CGPointMake(location.x - ball.position.x,location.y - ball.position.y);
      float distanceToMove = sqrtf(moveDifference.x * moveDifference.x +moveDifference.y * moveDifference.y);
      float moveDuration = distanceToMove / ballVelocity;
  
  
      Act_Move = [SKAction moveTo:location duration:moveDuration];
      Act_MoveDone = [SKAction runBlock:^(){
      NSLog(@"stoped");}];
      ActballMoveSeq = [SKAction sequence:@[Act_Move,Act_MoveDone]];
  
  
      if(((location.y>screenSize.height/2)&&(ball.position.y<screenSize.height/2))||((location.y<screenSize.height/2)&&(ball.position.y>screenSize.height/2))){
  
          if(canTap == true){
              [ball runAction:ActballMoveSeq withKey:@"moveBall_seq"];
          }
      }
  }

Answer 1

为了使球向上移动一定距离并自行返回，请在节点上使用applyImpulse。

// modify the dy value (100) to whatever value suits your needs
[myNode.physicsBody applyImpulse:CGVectorMake(0, 100)];

只要您的节点受到重力的影响，它最终会回落。