ios - 使用 block 的 Sprite-kit Action

Question

我有:

• 您单击，球就会移动到该位置。

• 屏幕水平分为上下两部分。

• 假设球位于下侧，您无法单击下侧来使其移动。您必须单击屏幕的顶部。这会根据上或下翻转。

我要做什么:

• x 坐标根本不变。

• 当球击中顶部时，它会改变方向并向下返回

• 删除 UITouch 位置变量

• 上下撑杆系统撑杆

  每件事都有帮助，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

要使球向上移动一定距离并自行下降，请对您的节点使用 applyImpulse。

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

只要你的节点受到重力的影响，它最终就会下降。