About the release of qtablewidgetitem memory usage

In the current project, data in some tables is refreshed regularly, and the number of rows is not fixed. Each time I used to create a new qtabelwidgetitem, I applied for memory. However, because it cannot be released for the next time, you can only consider deleting the last allocated memory at the next refresh.

You can use the following method:

Obtain the rowcount of a table each time, traverse it, and use the UI. tablewidget-> item (I, j) returns a pointer-type item. As described in this document, if item is not set, 0 is returned, so we can judge it, if (item) and then delete item; then you can.

In this way, the memory applied for last time is released during each refresh to avoid increasing the memory.