I right-click on QT UI designer controls - & gt; To the groove - & gt; Clicked () - & gt; OK, add slot function,
Click on the button, but the groove function is not called,

If you use the connect (UI - & gt; PushButton_5, & amp; QPushButton: : clicked, this, & amp; MainWindow: : on_pushButton_5_clicked); Manually add can perform,

Montana please help me have a look at what the problem is,

Before adding any other button, can be normal use,
Program manually add to other channel function, is used directly connect to add,