Qt实战-程序启动动画

1、项目介绍

很多的商用软件在启动之前都会有一段启动动画，当启动动画消失时，软件的主界面也就会呈现。程序的启动动画可以帮助我们了解到软件的一些相关信息，下面将介绍一个我自己设计的比较美观的程序启动动画。

2、UI界面的设计

如下是SplashScreen.ui的设计界面:

2.1、美化界面的qss代码

QLabel#label{
color:rgb(254,121,199);
}
QLabel#label_2{
color:rgb(98,114,164);
}
QLabel#label_3{
color:rgb(98,114,164);
}
QLabel#label_4{
color:rgb(98,114,164);
}
QFrame#frame{
background-color:rgb(56,58,89);
color:rgb(220,220,220);
border-radius:10px;
}
QProgressBar{
background-color:rgb(98,114,164);
color:rgb(200,200,200);
border-style:none;
border-radius:10px;
text-align:center;
}
QProgressBar::chunk{
border-radius:10px;
background-color: qlineargradient(spread:pad, x1:0, y1:0.511364, x2:1, y2:0.523, stop:0 rgba(254, 121, 199, 255), stop:1 rgba(170, 85, 255, 255));
}

3、完整代码

SplashScreen.h如下:

#pragma once

#include 
#include "ui_SplashScreen.h"
#include
#include"MainWindow.h"


class SplashScreen : public QWidget
{
	Q_OBJECT

public:
	SplashScreen(QWidget *parent = nullptr);
	~SplashScreen();

private slots:
	void updateBarValue();

private:
	Ui::SplashScreenClass ui;
	QTimer *m_timer;
	int m_value;
	MainWindow* win;
};

SplashScreen.cpp如下:

#include "SplashScreen.h"
#include

SplashScreen::SplashScreen(QWidget *parent)
	: QWidget(parent)
{
	ui.setupUi(this);
	m_timer = new QTimer(this);
	connect(m_timer, &QTimer::timeout, this, &SplashScreen::updateBarValue);
	m_timer->start(30);
	this->setWindowFlag(Qt::FramelessWindowHint);
	this->setAttribute(Qt::WA_TranslucentBackground);
	//设置边框阴影
	QGraphicsDropShadowEffect* shadow = new QGraphicsDropShadowEffect(this);
	shadow->setOffset(0, 0);
	shadow->setColor(QColor(0, 0, 0, 60));
	shadow->setBlurRadius(10);
	this->ui.frame->setGraphicsEffect(shadow);
	m_value = 0;
	this->ui.progressBar->setValue(0);
}

SplashScreen::~SplashScreen()
{}

void SplashScreen::updateBarValue()
{
	m_value++;
	this->ui.progressBar->setValue(m_value);
	if (m_value >= 100)
	{
		win = new MainWindow();
		win->show();
		m_timer->stop();
		this->close();
	}
}

main.cpp如下:

#include "MainWindow.h"
#include 
#include"SplashScreen.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
#if 0
    MainWindow w;
    w.show();
#endif
    SplashScreen screen;
    screen.show();
    return a.exec();
}

4、效果图