方法insertBefore是如何工作的？

answered 2012-09-17 18:34:36 +0800

jj
638 ● 3

Here is the code in the demo:

 void move(Component dragged) {
            if (self instanceof Listitem) {
                self.parent.insertBefore(dragged, self);
            } else {
                self.appendChild(dragged);
            }
        }

self.parent. insertBefore(dragged, self) means inserting the "dragged" before "self" as a child of ("self.parent")

Once you move the item to be a child of another component, it is automatically detached from its original parent