qt中QtreeWidget与QstackWidget关联的问题

目标：实现当点击QtreeWidget中的某个item的时候 切换stack的方法

过程：要做一个图书管理系统，主界面是类似于这样的

左边是类似于树形空间的东西，当点击左边的左边的窗体的时候，右边的窗口也会跟着切换。

为了实现这个功能，必须要有两个控件，QTreeWidget和QstackWidget;

以下是具体代码

1.Widge.h头文件

#ifndef WIDGET_H#define WIDGET_H#include <QWidget>#include<QStackedWidget>#include<QTreeWidget>#include<QTreeWidgetItem>#include<QString>#include<QLabel>#include<QGridLayout>#include<QHBoxLayout>#include<QStringList>class Widget : public QWidget{    Q_OBJECTpublic:    Widget(QWidget *parent = 0);    ~Widget();private:QStackedWidget *stackWindow;QHBoxLayout *mainLayout;QTreeWidget *treeWidget;QTreeWidgetItem *parentItem1;QTreeWidgetItem *parentItem2;QTreeWidgetItem *childItem1;QTreeWidgetItem *childItem2;QLabel *parentLable1;QLabel *parentLable2;QLabel *childLable1;QLabel *childLable2;public slots:void change1(QTreeWidgetItem* item1,int count1);};#endif // WIDGET_H

2.Widget.cpp具体的实现

#include "widget.h"#include<QObject>Widget::Widget(QWidget *parent)    : QWidget(parent){    //connect(treeWidget,SIGNAL(itemClicked(QTreeWidgetItem*,int)),this,SLOT(change1(QTreeWidgetItem*,int)));    stackWindow =new QStackedWidget;    mainLayout =new QHBoxLayout;    treeWidget =new QTreeWidget(this);    parentItem1=new QTreeWidgetItem(treeWidget,QStringList("parent1"));    parentItem2=new QTreeWidgetItem(treeWidget,QStringList("parent2"));    childItem1=new QTreeWidgetItem(parentItem1,QStringList("child1"));    childItem2=new QTreeWidgetItem(parentItem2,QStringList("child2"));    parentLable1=new QLabel("parentWindow1");    parentLable2=new QLabel("parentWindow2");    childLable1=new QLabel("childLable1");    childLable2=new QLabel("childLable2");    stackWindow->addWidget(parentLable1);    stackWindow->addWidget(parentLable2);    stackWindow->addWidget(childLable1);    stackWindow->addWidget(childLable2);    mainLayout->addWidget(treeWidget);    mainLayout->addWidget(stackWindow);   // stackWindow->setCurrentIndex(2);    this->setLayout(mainLayout);    //QObject::connect(treeWidget,SIGNAL(itemPressed(QTreeWidgetItem*,int)),this,SLOT(change1(QTreeWidgetItem* ,int )));//注释1    QObject::connect(treeWidget,SIGNAL(itemClicked(QTreeWidgetItem*,int)),this,SLOT(change1(QTreeWidgetItem* ,int)));}Widget::~Widget(){}void Widget::change1(QTreeWidgetItem *item1, int count1){    QTreeWidgetItem *item=item1;    if(item->text(count1)=="parent1")    {        stackWindow->setCurrentIndex(0);    }    else if(item->text(count1)=="parent2")    {        stackWindow->setCurrentIndex(1);    }    else if(item->text(count1)=="child1")    {        stackWindow->setCurrentIndex(2);    }    else if(item->text(count1)=="child2")    {        stackWindow->setCurrentIndex(3);    }}

注释1：

这两个连接中的槽函数的参数只能给出类型，而不能给出形参名；

这两个连接必须写在窗口初始化之后