How to monitor memory leak under Qt

This article will explain in detail how to monitor memory leaks under Qt. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

In order to prevent memory leaks, we manually write a macro to monitor whether the class is destructed or not, and print it out if it is not, so that we can better locate the problem. The code is as follows:

Define a helper class to count, count + 1 when the registered class is declared, and-1 when the class is destructed. If the count is greater than 0 when the class is destructed, the registered class is not destructed, then it is printed, prompting the developer to have a memory leak problem and telling which class is not destructed.

Class CountCheckerHelper {public: CountCheckerHelper (const char * className, const char * fileName): m_className (className), m_fileName (fileName), m_refCount (0) {} ~ CountCheckerHelper () {if (m_refCount > 0) {qDebug ()