Qt development tips

One 、 Set console output

Because some third-party libraries or libraries of others are used , There will be tests output on the console , You can open the console ;

The method is as follows ：

1.xxx.pro file increase ：CONFIG += console

2. choice Run、 Check Run in terminal

3. recompile ;

Two 、Qt Use cout Output more detailed debugging information

Use The file where the global macro outputs debugging information 、 Line number 、 Function where

#define qDebug() qDebug() <<"["<< __FILE__ <<__FUNCTION__<< __LINE__<<"]"<<":"
 

3、 ... and 、 Shield warning

Shield some useless warnings , however , It is still recommended to keep the warning , Convenient debugging .

CONFIG += warn_off

Four 、 Detect the program version

#ifdef QT_NO_DEBUG  
qDebug() << "release mode";  
#else  
qDebug() << "debug mode";  
#endif

5、 ... and 、 Set the software version number

stay .pro Add the following code to the file and set the version number to 1.0.0.0

VERSION = 1.0.0.0

  6、 ... and 、 Chinese scrambling

In the class with Chinese , Add... To the header file declaration

#pragma execution_character_set("utf-8")

7、 ... and 、 Generate executable files exe Icon

Method ：

pro Add RC_ICONS=logo.ico

Be careful ： here png Can't be used directly ,

You can use this website to transfer directly , Free of charge ;

Simple version image transfer ico Icon ：https://www.butterpig.top/ico

effect ：

8、 ... and 、Qt Remove the title bar from The biggest and the smallest close Help button, etc

Remove the close button

setWindowFlags(windowFlags()&~Qt::WindowCloseButtonHint);

Remove the close and help buttons

setWindowFlags(windowFlags()&~Qt::WindowCloseButtonHint&~Qt::WindowContextHelpButtonHint);

What you want to remove can be added at once

//WindowFlags Include :
    Qt::FrameWindowHint:// Windows without borders 
    Qt::WindowStaysOnTopHint:// Always in the top window 
    Qt::CustomizeWindowHint:// Custom window title bar , The following logo must be used with this logo to be valid , Otherwise, the window will have a default title bar 
    Qt::WindowTitleHint: Show window title bar 
    Qt::WindowSystemMenuHint:// Display system menu 
    Qt::WindowMinimizeButtonHint:// Show minimize button 
    Qt::WindowMaximizeButtonHint:// Show maximize button 
    Qt::WindowMinMaxButtonsHint:// Show minimize button and maximize button 
    Qt::WindowCloseButtonHint:// Show close button 

To display ：

setWindowFlags(Qt::CustomizeWindowHint
                   | Qt::WindowTitleHint
                   | Qt::WindowMinimizeButtonHint
                   | Qt::WindowMaximizeButtonHint
                   | Qt::WindowCloseButtonHint
                   );