運行截圖如下：

代碼如下：

widget.h

#ifndef WIDGET_H #define WIDGET_H#include <QWidget>namespace Ui { class Widget; }class Widget : public QWidget {Q_OBJECTpublic:explicit Widget(QWidget *parent = 0);~Widget();public slots:void ptnClicked();private:Ui::Widget *ui;bool isFirstSeacher; };#endif // WIDGET_H

widget.cpp

#include "widget.h" #include "ui_widget.h"Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget) {ui->setupUi(this);QTreeWidgetItem *newItem1=new QTreeWidgetItem();newItem1->setText(0,"CSDN IT1995");QTreeWidgetItem *newItem2=new QTreeWidgetItem();newItem2->setText(0,"CSDN IT1994");QTreeWidgetItem *newItem3=new QTreeWidgetItem();newItem3->setText(0,"CSDN IT1995");QTreeWidgetItem *newItem4=new QTreeWidgetItem();newItem4->setText(0,"CSDN IT1993");QTreeWidgetItem *newItem5=new QTreeWidgetItem();newItem5->setText(0,"CSDN IT1995");ui->treeWidget->addTopLevelItem(newItem1);ui->treeWidget->addTopLevelItem(newItem2);ui->treeWidget->addTopLevelItem(newItem3);ui->treeWidget->addTopLevelItem(newItem4);ui->treeWidget->addTopLevelItem(newItem5);connect(ui->pushButton,SIGNAL(clicked(bool)),this,SLOT(ptnClicked()));isFirstSeacher=false; }void Widget::ptnClicked(){QTreeWidgetItem *currItem=ui->treeWidget->currentItem();if(isFirstSeacher==true){QTreeWidgetItemIterator it_true(ui->treeWidget->currentItem());it_true++;while(*it_true){if((*it_true)->text(0).contains(ui->lineEdit->text())){ui->treeWidget->setCurrentItem(*it_true);isFirstSeacher=true;return;}++it_true;}if(currItem==(*it_true)){isFirstSeacher=false;}}QTreeWidgetItemIterator it(ui->treeWidget);while(*it){if((*it)->text(0).contains(ui->lineEdit->text())){ui->treeWidget->setCurrentItem(*it);isFirstSeacher=true;return;}++it;} }Widget::~Widget() {delete ui; }

main.cpp

#include "widget.h" #include <QApplication>int main(int argc, char *argv[]) {QApplication a(argc, argv);Widget w;w.show();return a.exec(); }

總結

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