Qtablewiget 清空表格内容;

void QTableWidget::clear () [slot]//清空掉表格内所有内容，包括标题头

Removes all items in the view. This will also remove all selections. The table dimensions stay the same.

void QTableWidget::clearContents () [slot]//这个清空所有内容不包括标题头

Removes all items not in the headers from the view. This will also remove all selections. The table dimensions stay the same.

1. void QTableWidget::removeColumn ( int column ) [slot]//这个是删除一列，而不是清空表格  
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3. Removes the column column and all its items from the table.  
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5. void QTableWidget::removeRow ( int row ) [slot]//这个是删除一行，不是清空一行  
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7. Removes the row row and all its items from the table.