基于Qt和C++实现的图片文字和base64编码互转界面操作+源码（期末大作业&课设&项目开发）

#pragma execution_character_set("utf-8") #include "frmbase64helper.h" #include "ui_frmbase64helper.h" #include "base64helper.h" #include "qfiledialog.h" #include "qdebug.h" frmBase64Helper::frmBase64Helper(QWidget *parent) : QWidget(parent), ui(new Ui::frmBase64Helper) { ui->setupUi(this); } frmBase64Helper::~frmBase64Helper() { delete ui; } void frmBase64Helper::showTime(qint64 size1, qint64 size2) { //统计用时 #if (QT_VERSION >= QT_VERSION_CHECK(4,8,0)) double elapsed = (double)timer.nsecsElapsed() / 1000000; #else double elapsed = (double)timer.elapsed(); #endif QString time = QString::number(elapsed, 'f', 3); ui->labInfo->setText(QString("用时: %1 毫秒 大小: %2 -> %3").arg(time).arg(size1).arg(size2)); } void frmBase64Helper::on_btnOpen_clicked() { QString fileName = QFileDialog::getOpenFileName(this, "选择文件", "", "图片(*.png *.bmp *.jpg)"); if (!fileName.isEmpty()) { ui->txtFile->setText(fileName); QPixmap pix(fileName); pix = pix.scaled(ui->labImage->size() - QSize(4, 4), Qt::KeepAspectRatio); ui->labImage->setPixmap(pix); } } void frmBase64Helper::on_btnClear_clicked() { ui->txtFile->clear(); ui->txtText->clear(); ui->txtBase64->clear(); ui->labImage->clear(); } void frmBase64Helper::on_btnImageToBase64_clicked() { QString fileName = ui->txtFile->text().trimmed(); if (fileName.isEmpty()) { return; } timer.restart(); QImage image(fileName); QString text = Base64Helper::imageToBase64(image); showTime(QFile(fileName).size(), text.size()); ui->txtBase64->setText(text); } void frmBase64Helper::on_btnBase64ToImage_clicked() { QString fileName = ui->txtFile->text().trimmed(); QString text = ui->txtBase64->toPlainText().trimmed(); if (text.isEmpty()) { return; } timer.restart(); QImage image = Base64Helper::base64ToImage(text); showTime(text.size(), QFile(fileName).size()); QPixmap pix = QPixmap::fromImage(image); pix = pix.scaled(ui->labImage->size() - QSize(4, 4), Qt::KeepAspectRatio); ui->labImage->setPixmap(pix); } void frmBase64Helper::on_btnTextToBase64_clicked() { QString text = ui->txtText->text().trimmed(); if (text.isEmpty()) { return; } timer.restart(); QString result = Base64Helper::textToBase64(text); showTime(text.size(), result.size()); ui->txtBase64->setText(result); } void frmBase64Helper::on_btnBase64ToText_clicked() { QString text = ui->txtBase64->toPlainText().trimmed(); if (text.isEmpty()) { return; } timer.restart(); QString result = Base64Helper::base64ToText(text); showTime(text.size(), result.size()); ui->txtText->setText(result); }