Qt作业3.0（qt电子相册初版）

//dialog.cpp #include "dialog.h" #include "ui_dialog.h" static int id=0; Dialog::Dialog(QWidget *parent) : QDialog(parent), ui(new Ui::Dialog) { ui->setupUi(this); QString s1(":/new/prefix1/111.jpg"); QString s2(":/new/prefix1/222.jpg"); QString s3(":/new/prefix1/333.jpg"); QString s4(":/new/prefix1/444.jpg"); path.prepend(s1); path.append(s2); path.append(s3); path.append(s4); connect(ui->pushButton,SIGNAL(clicked()), this,SLOT(btnClickSlot())); connect(ui->pushButton_2,SIGNAL(clicked()), this,SLOT(btnClickSlot1())); } Dialog::~Dialog() { delete ui; } void Dialog::btnClickSlot() { if(id==3) { id=0; } qDebug()<<"下一张"; QPixmap pic(path.at(id)); ui->label->setPixmap(pic);id++; } void Dialog::btnClickSlot1() { id--; if (id < 0) { id = 3; } qDebug() << "上一张"; QPixmap pic(path.at(id)); ui->label->setPixmap(pic); }