Why does the "No such slot" error occur?

Question

Qt

Hello!
There are slots. There are no problems with them. Added one more by analogy.
In the header file in public slots: I wrote void UserSettingsSave ();
In the method void UserSettings(); wrote:

save_button->connect(save_button, SIGNAL(clicked(bool)), this, SLOT(UserSettingsSave()));

And it doesn't work. Writes:

QObject::connect: No such slot MainWindow::UserSettingsSave()
QObject::connect: (sender name: 'save_button')
QObject::connect: (receiver name: 'MainWindow')

There is a similar line above:

profile_button->connect(profile_button, SIGNAL(clicked(bool)), this, SLOT(UserProfile()));

Which does its job perfectly and does not cause errors.

Answer 1

• First, the profile_button-> at the beginning of the line is not needed
  
• Third, try running qmake
  
• Fourth, read about the new signal and slot syntax
  
• Fifth, it is not customary to name methods with a capital letter, only classes
  

Answer 2

Sometimes Qt Creator glitches and a complete recompilation of the project is required.
For some reason, MOC did not start.

Answer 3

We probably need to review the entire code?