C#开发跨平台游戏——在游戏中使用背景音乐和按钮音效
上一篇我们讲了游戏中按钮的实现，今天我们来讲讲如何在游戏中播放音乐和按钮音效。
首先下载音乐和音效文件：MusicAndSound ,另外推荐一个下载游戏音效和音乐的网站：https://www.zapsplat.com/ ，里面可以下载到免费的音乐和音效。
然后解压，如图
背景音乐：【BackgroundMusic.mp3】按钮点击音效：【ButtonPressedSound.mp3】
将这文件拷贝到【HelloWorld.XNAContent】项目中
点击【HelloWorld.XNAContent】项目中的【BackgroundMusic.mp3】右键属性，
Asset Name设置为BackgroundMusic，
Content Importer设为 MP3 Audio File – XNA Framework
Content Processor设为 Song – XNA Framework
点击【HelloWorld.XNAContent】项目中的【ButtonPressed.mp3】右键属性，
Asset Name设置为ButtonPressed，
Content Importer设为 MP3 Audio File – XNA Framework
Content Processor设为 Sound Effect– XNA Framework
打开Game1.cs文件，找到【Texture2D button;】,在下面定义背景音乐和音效
Song backgroundMusic;//定义背景音乐 SoundEffect buttonPressedSound;//定义按钮音效
找到【LoadContent()】方法，在方法体内加载背景音乐和按钮音效
backgroundMusic = Content.Load<Song>("BackgroundMusic");//加载背景音乐
buttonPressedSound = Content.Load<SoundEffect>("ButtonPressedSound");//加载按钮音效
由于需要在游戏开始就播放音乐，可以在加载背景音乐后直接播放，所以可以在【LoadContent()】方法体中，添加如下代码
MediaPlayer.IsRepeating = true;//重复播放背景音乐 MediaPlayer.Play(backgroundMusic);//播放背景音乐 //MediaPlayer.Volume = 1;//背景音乐声音大小(0.1f-1.0f) //MediaPlayer.Stop();
当然还有停止播放【MediaPlayer.Stop();】还可以控制声音的大小【MediaPlayer.Volume = 1;】
找到【Update(GameTime gameTime)】方法，找到上次提到的点击按钮的代码，输入
buttonPressedSound.Play();//播放按钮音效
完整代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;
namespace HelloWorld.XNA
{
/// <summary>
/// This is the main type for your game
/// </summary>
public class Game1 : Microsoft.Xna.Framework.Game
{
GraphicsDeviceManager graphics;
SpriteBatch spriteBatch;
SpriteFont defaultFont;
Color backgoundColor;
Texture2D mouseCursor;
Vector2 mouseCursorPosition;
Texture2D buttonNormal;
Texture2D buttonMoveOver;
Texture2D buttonPressed;
Rectangle buttonRect;
Texture2D button;
Song backgroundMusic;//定义背景音乐
SoundEffect buttonPressedSound;//定义按钮音效
public Game1()
{
graphics = new GraphicsDeviceManager(this);
Content.RootDirectory = "Content";
graphics.PreferredBackBufferWidth = 800;
graphics.PreferredBackBufferHeight = 600;
graphics.IsFullScreen = false;
IsMouseVisible = false;
}
/// <summary>
/// Allows the game to perform any initialization it needs to before starting to run.
/// This is where it can query for any required services and load any non-graphic
/// related content. Calling base.Initialize will enumerate through any components
/// and initialize them as well.
/// </summary>
protected override void Initialize()
{
// TODO: Add your initialization logic here
base.Initialize();
}
/// <summary>
/// LoadContent will be called once per game and is the place to load
/// all of your content.
/// </summary>
protected override void LoadContent()
{
// Create a new SpriteBatch, which can be used to draw textures.
spriteBatch = new SpriteBatch(GraphicsDevice);
// TODO: use this.Content to load your game content here
defaultFont = Content.Load<SpriteFont>("DefaultFont");
backgoundColor = Color.CornflowerBlue;
mouseCursor = Content.Load<Texture2D>("MouseCursor");
buttonNormal = Content.Load<Texture2D>("ButtonNormal");
buttonMoveOver = Content.Load<Texture2D>("ButtonMoveOver");
buttonPressed=Content.Load<Texture2D>("ButtonPressed");
buttonRect = new Rectangle(300, 200,128,128);
button = buttonNormal;
backgroundMusic = Content.Load<Song>("BackgroundMusic");//加载背景音乐
buttonPressedSound = Content.Load<SoundEffect>("ButtonPressedSound");//加载按钮音效
MediaPlayer.IsRepeating = true;//重复播放背景音乐
MediaPlayer.Play(backgroundMusic);//播放背景音乐
}
/// <summary>
/// UnloadContent will be called once per game and is the place to unload
/// all content.
/// </summary>
protected override void UnloadContent()
{
// TODO: Unload any non ContentManager content here
}
/// <summary>
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input, and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
// Allows the game to exit
KeyboardState keyboardState = Keyboard.GetState(PlayerIndex.One);
if(keyboardState.IsKeyDown(Keys.Escape))
{
this.Exit();
}
if(keyboardState.IsKeyDown(Keys.F10))
{
graphics.IsFullScreen = true;
graphics.ApplyChanges();
}
if(keyboardState.IsKeyDown(Keys.F11))
{
graphics.IsFullScreen = false;
graphics.ApplyChanges();
}
if (keyboardState.IsKeyDown(Keys.F12))
{
graphics.PreferredBackBufferWidth = 1920;
graphics.PreferredBackBufferHeight = 1080;
graphics.ApplyChanges();
}
MouseState mouseState = Mouse.GetState();//获取鼠标状态
if(mouseState.LeftButton==ButtonState.Pressed)//判断是否按下了鼠标左键
{
backgoundColor = Color.Red;//将背景设置为红色
if (buttonRect.Contains(mouseState.X, mouseState.Y))//判断鼠标是否移动到按钮上并且按下
{
button = buttonPressed;//将按钮设置为按下状态
buttonPressedSound.Play();//播放按钮音效
}
}
else
{
if (buttonRect.Contains(mouseState.X, mouseState.Y))//判断鼠标是否移动到按钮上
{
button = buttonMoveOver;//将按钮设置为悬停状态
}
else//鼠标不在按钮上
{
button = buttonNormal;//将按钮设置为正常状态
}
backgoundColor = Color.CornflowerBlue;//放开鼠标左键恢复成蓝色
}
mouseCursorPosition = new Vector2(mouseState.X, mouseState.Y);
// TODO: Add your update logic here
base.Update(gameTime);
}
/// <summary>
/// This is called when the game should draw itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(backgoundColor);//绘制游戏背景
// TODO: Add your drawing code here
spriteBatch.Begin();
spriteBatch.DrawString(defaultFont, "这是我的第一个游戏", Vector2.Zero, Color.White);
//绘制按钮
spriteBatch.Draw(button, buttonRect, Color.White);
spriteBatch.Draw(mouseCursor,mouseCursorPosition,Color.White);
spriteBatch.End();
base.Draw(gameTime);
}
}
}
点击【启动】
运行效果，由于gif图片没有声音，大家可以自己运行自己的代码来体验效果
