添加控件，添加行列数

widget.cpp

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget)
{ui->setupUi(this);Init();
}Widget::~Widget()
{delete ui;
}void Widget::Init()
{int i,j;ui->tableWidget->horizontalHeader()->setStretchLastSection(true);//设置每一行最后一个单元格不留空格ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);//设置自适应大小ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);//设置等宽//设置表格中每一行的内容row_count = ui->tableWidget->rowCount();column_count = ui->tableWidget->columnCount();qDebug()<<"row"<<row_count<<"column"<<column_count;for( i=0;i<row_count;i++){for( j=0;j<column_count;j++){ui->tableWidget->setItem(i,j,new QTableWidgetItem(QString::number(j)));}}//打印表格数据//遍历数据QTableWidgetItem* item;QString str;for(int i = 0; i < ui->tableWidget->rowCount(); i++){for(int j = 0; j < ui->tableWidget->columnCount(); j++){item = ui->tableWidget->item(i, j);str = str + item->text() + " ";}}qDebug()<<"str = "<<str;// 返回鼠标单击的所在单元格的row和colconnect(ui->tableWidget,SIGNAL(cellClicked(int,int)),this,SLOT(show_prodcut_sets(int,int)));connect(ui->tableWidget->selectionModel(), SIGNAL(currentChanged(const QModelIndex &, const QModelIndex &)),SLOT(doProcessSelLine(void)));}//单击某个单元格
void Widget::show_prodcut_sets(int row,int col)
{QString str;qDebug() << "所点击的单元格的row=" << row << ",col=" << col;// 获取所点击的单元格QTableWidgetItem* item = ui->tableWidget->item(row ,col);qDebug() <<"内容为："<< item->text();
}//选中某一列
void Widget::doProcessSelLine(){int current_column;QString str;QTableWidgetItem* item;current_column = ui->tableWidget->currentColumn();//获取当前行号//打印行内容for(int j = 0; j < ui->tableWidget->columnCount(); j++){item = ui->tableWidget->item(current_column, j);str = str + item->text() + " ";}qDebug()<<str<<endl;
}

widget.h

#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QTabWidget>
#include <QTableWidgetItem>
#include <QDebug>
namespace Ui {
class Widget;
}class Widget : public QWidget
{Q_OBJECTpublic:explicit Widget(QWidget *parent = nullptr);~Widget();private:Ui::Widget *ui;void Init(void);int row_count,column_count;
private slots:void show_prodcut_sets(int,int);void doProcessSelLine(void);
};#endif // WIDGET_H

效果