在窗口1中一个lineEdit和一个button ，点击button弹出窗口2，窗口2中有一个lineEdit-2，在lineEdit中输入数据，点击button数据就显示在lineEdit-2中 -In the window 1 in a lineEdit and a button and click on the button popup window 2, the window of a lineEdit 2-2, in lineEdit input data in, click on