XNA游戏开发之(三)——使用IsRunningSlowly

最新推荐文章于 2025-08-07 16:42:30 发布

wind1979

最新推荐文章于 2025-08-07 16:42:30 发布

阅读量447

点赞数

分类专栏：转载教程文章标签：游戏 initialization components system query input

转载教程专栏收录该内容

11 篇文章

订阅专栏

本文探讨了在XNA框架下调整游戏刷新频率时遇到的问题及解决方案。通过修改TargetElapsedTime来控制屏幕刷新频率，当设定的刷新频率过高时，XNA可能无法达到此频率，此时gameTime.IsRunningSlowly返回true。文章提供了代码示例说明如何检测并处理这种情况。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

当使用TargetElapsedTime改变屏幕刷新频率过高，XNA无法达到时，这种情况下gameTime.IsRunningSlowly=true;

将gameTime参数传递到Update方法中去判断gameTime. IsRunningSlowly

代码

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;
using Microsoft.Xna.Framework.Net;
using Microsoft.Xna.Framework.Storage;
namespace Alex
{
///
/// This is the main type for your game
///
public class AlexGame : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
public AlexGame()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
        }
///
/// 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.
///
protected override void Initialize()
        {
// TODO: Add your initialization logic here
//设置刷新次数过大会导致程序报错
this.TargetElapsedTime = TimeSpan.FromSeconds(1.0f / 2400.0f);
base.Initialize();
        }
///
/// LoadContent will be called once per game and is the place to load
/// all of your content.
///
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
        }
///
/// UnloadContent will be called once per game and is the place to unload
/// all content.
///
protected override void UnloadContent()
        {
// TODO: Unload any non ContentManager content here
        }
///
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input, and playing audio.
///
///

Provides a snapshot of timing values.
protected override void Update(GameTime gameTime)
        {
// Allows the game to exit
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
            {
this.Exit();
            }
if (Keyboard.GetState().IsKeyDown(Keys.Escape))
            {
this.Exit();
            }
//在标题栏显示但未能运行
this.Window.Title = gameTime.IsRunningSlowly.ToString();
// TODO: Add your update logic here
base.Update(gameTime);
        }
///
/// This is called when the game should draw itself.
///
/// Provides a snapshot of timing values.
protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.CornflowerBlue);
// TODO: Add your drawing code here
base.Draw(gameTime);
        }
    }
}