如何在SpriteKit中创建可调整大小的框？

Question

我想在我的项目中创建可调整大小的框，例如Apple Pages的框。 一切都很好（如果我调整我的盒子，我的代码中的图像可以完美地工作），除了在旋转盒子时调整盒子的大小（内部有一个图像）。 我认为这是一个算法问题，但我真的不知道如何纠正它。这是我的代码：

func handlePanBox(panReco:UIPanGestureRecognizer)
{
    var touchLoc: CGPoint

    touchLoc = self.scene!.convertPointFromView(panReco.locationInView(panReco.view))

    if panReco.state == UIGestureRecognizerState.Began
    {
            coeff_drag_x_box = touchLoc.x - box_to_touch!.position.x
            coeff_drag_y_box = touchLoc.y - box_to_touch!.position.y
    }
    else if panReco.state == UIGestureRecognizerState.Changed
    {
        if (box_to_touch != nil)
        {
            var new_pos = touchLoc

            if (self.resize == true)
            {
                previous_drag_x_box = coeff_drag_x_box
                previous_drag_y_box = coeff_drag_y_box

                coeff_drag_x_box = ceil(touchLoc.x - box_to_touch!.position.x)
                coeff_drag_y_box = ceil(box_to_touch!.position.y - touchLoc.y)

                let box_index: Int! = box_to_touch!.name!.substringFromIndex(box_to_touch!.name!.endIndex.predecessor()).toInt()

                var move_x: CGFloat?
                var move_y: CGFloat?
                var size_width: CGFloat?
                var size_height: CGFloat?

                move_x = 0
                move_y = 0
                size_width = 0
                size_height = 0

                switch box_index
                    {
                case 0:
                    move_x = coeff_drag_x_box!
                    move_y = 0
                    size_width = -coeff_drag_x_box!
                    size_height = -coeff_drag_x_box!
                case 1:
                    move_x = 0
                    move_y = 0
                    size_width = 0
                    size_height = coeff_drag_y_box!
                case 2:
                    move_x = 0
                    move_y = 0
                    size_width = coeff_drag_y_box!
                    size_height = coeff_drag_y_box!
                case 3:
                    move_x = 0
                    move_y = 0
                    size_width = -(previous_drag_x_box! - coeff_drag_x_box!)
                    size_height = 0
                case 4:
                    move_x = 0
                    move_y = (coeff_drag_y_box! - previous_drag_y_box!)
                    size_width = -(coeff_drag_y_box! - previous_drag_y_box!)
                    size_height = -(coeff_drag_y_box! - previous_drag_y_box!)
                case 5:
                    move_x = 0
                    move_y = (coeff_drag_y_box! - previous_drag_y_box!)
                    size_width = 0
                    size_height = -(coeff_drag_y_box! - previous_drag_y_box!)
                case 6:
                    move_x = coeff_drag_x_box!
                    move_y = coeff_drag_x_box!
                    size_width = -coeff_drag_x_box!
                    size_height = -coeff_drag_x_box!
                case 7:
                    move_x = coeff_drag_x_box!
                    move_y = 0
                    size_width = -coeff_drag_x_box!
                    size_height = 0
                default:
                    move_x = 0
                    move_y = 0
                    size_width = 0
                    size_height = 0
                }
                if ((self.scene!.size.width + size_width!) > 100 && (self.scene!.size.height + size_height!) > 100)
                {
                    new_pos = CGPointMake(self.frame.origin.x + move_x!, self.frame.origin.y + move_y!)

                    self.frame.origin = new_pos

                    self.scene?.size = CGSizeMake(self.scene!.size.width + size_width!, self.scene!.size.height + size_height!)
                    self.frame.size = CGSizeMake(self.frame.size.width + size_width!, self.frame.size.height + size_height!)

                    for node_child in self.scene!.children
                    {
                        var node_to_resize = node_child as? ImageSpriteNode

                        if (node_to_resize?.name != kBoxContactPoint && node_to_resize?.name != kPointContact && node_to_resize?.resize == true)
                        {
                            node_to_resize!.size = CGSizeMake(node_to_resize!.size.width + size_width!, node_to_resize!.size.height + size_height!)
                        }
                    }

                    self.create_contact_points(box_index)
                }
        }
    }
    else if panReco.state == UIGestureRecognizerState.Ended
    {
        box_to_touch = nil
        self.create_contact_points(-1)
   }
}

谢谢！

修改

我的图片位置正确：

我用左右滑动调整大小后（没关系）：

旋转位置的图像：

我用左右滑动调整大小后（这是错误的）：