QMediaPlayer 类的应用--音频播放器

QMediaPlayer 类：媒体播放器，主要用于播放歌曲、网络收音机等功能。

在pro文件中添加QT += multimedia

• QAudioFrePro.pro

#-------------------------------------------------
#
# Project created by QtCreator 2024-01-17T22:18:26
#
#-------------------------------------------------

QT       += core gui

QT +=multimedia
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = QAudioFrePro
TEMPLATE = app

# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

CONFIG += c++11

SOURCES += \
        main.cpp \
        mainwindow.cpp

HEADERS += \
        mainwindow.h

FORMS += \
        mainwindow.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${
   TARGET}/bin
else: unix:!android: target.path = /opt/$${
   TARGET}/bin
!isEmpty(target.path): INSTALLS += target

RESOURCES += \
    images.qrc

• mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
//添加头文件
#include <QMediaPlayer>//媒体播放器
#include <