C#开发跨平台游戏——在MONOGAME/XNA中使用触控操作TouchPanel

发表于： 2020年5月6日 2020年5月7日
分类： C#开发跨平台游戏
标签： MonoGame, TouchPanel, XNA
4,111 views

上次我介绍了在MonoGame/XNA中使用键盘, 这次我来介绍一下在MonoGame/XNA中使用触摸（触控）

通常在编写手机平板游戏用的最多的就是触摸（触控），所以你需要一台支持触摸的设备，比如手机/平板或者一台能够触摸的电脑显示器，当然使用模拟器也可以的。

打开Visual Studio，【文件】【新建】【项目】

【MonoGame】，项目模板有多种选择，你可以选【MonoGame Windows 10 Universal（Core Application）Project】【MonoGame Windows 10 Universal （XAML）Project】【MonoGame Android Project】【MonoGame iOS Project】，这些项目都支持触摸（触控）API，为了方便起见我们选择【MonoGame Windows 10 Universal （XAML）Project】，这种项目模板可以直接在Windows10上测试和调试，将项目名称命名为【MyTouchPanel】,点击【确定】

目标版本默认即可，最低版本选择【Windows 10 （10.0；版本10240）】这样保证支持所有Windows10用户。点击【确定】

在解决方案管理器中打开Game1.cs

找到Update(GameTime gameTime)方法，在方法中加入以下代码：

 var touches = Microsoft.Xna.Framework.Input.Touch.TouchPanel.GetState();
            foreach (var touch in touches)
            {
                if (touch.State != Microsoft.Xna.Framework.Input.Touch.TouchLocationState.Released)
                {
                    System.Diagnostics.Debug.WriteLine(touch.State.ToString());
                }

            }

var touches = Microsoft.Xna.Framework.Input.Touch.TouchPanel.GetState();

foreach (var touch in touches)

{

if (touch.State != Microsoft.Xna.Framework.Input.Touch.TouchLocationState.Released)

{

System.Diagnostics.Debug.WriteLine(touch.State.ToString());

}

和之前介绍的手柄/键盘使用方式非常相似，不同的是获取到的触控状态是一个集合，需要用一个foreach循环去获取装当前状态。

Microsoft.Xna.Framework.Input.Touch.TouchLocationState有四种状态:无法识别（未知），手指触屏后移动，手指点击屏幕，手指点击屏幕后离开屏幕

上面的代码我并没有使用【touch.State == Microsoft.Xna.Framework.Input.Touch.TouchLocationState.Pressed】来判断是否触屏，而是用了非Released来判断，这是因为触摸会同时执行pressed,moved，moved甚至会执行多次,所以非Released包含了这些操作！配合手势操作可以做多点触控游戏

点击【本地计算机】运行游戏

用你的手指触摸蓝色窗口

在Visual Studio的输出窗口就会显示触摸状态的名称

如果你的屏幕不带触摸功能，触摸蓝色窗口在Visual Studio的输出窗口是不会显示触摸状态的！那么在不支持触摸屏幕的情况下有没有办法开发触摸功能呢？

答案是有的！

方法一：

将【本地计算机】改为【模拟器】，点击【模拟器】调试代码

这时候会启动一个当前电脑的触摸屏模拟器，点击用鼠标蓝色屏幕即可！

也可以选择右边的工具栏来中的【手型】后点击蓝色窗口！

方法二(本方法可以方便的移植Windows游戏到触屏设备)：

打开Game1.cs, 在Game1类的构造方法中加入

  IsMouseVisible = true;
            
  Microsoft.Xna.Framework.Input.Touch.TouchPanel.EnableMouseTouchPoint = true;

IsMouseVisible = true;

Microsoft.Xna.Framework.Input.Touch.TouchPanel.EnableMouseTouchPoint = true;

【IsMouseVisible = true; 】鼠标移动到蓝色窗口内显示【Microsoft.Xna.Framework.Input.Touch.TouchPanel.EnableMouseTouchPoint = true;】同时支持鼠标操作和触摸操作这样就可以用鼠标来代替触摸（触控操作）

注意：如果你使用的是XNA，那么只有XNA的windows phone项目才支持触摸（触控）API

如果你新建的是Android和iOS项目，无论是模拟器还是插入手机都可以测试上述代码！

完整代码如下：

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

namespace MyTouchPanel
{
    /// <summary>
    /// This is the main type for your game.
    /// </summary>
    public class Game1 : Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;

        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
            IsMouseVisible = true;
            Microsoft.Xna.Framework.Input.Touch.TouchPanel.EnableMouseTouchPoint = true;
           
        }

        /// <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
        }

        /// <summary>
        /// UnloadContent will be called once per game and is the place to unload
        /// game-specific 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)
        {
            // TODO: Add your update logic here
            var touches = Microsoft.Xna.Framework.Input.Touch.TouchPanel.GetState();
            foreach (var touch in touches)
            {
                if (touch.State != Microsoft.Xna.Framework.Input.Touch.TouchLocationState.Released)
                {
                    System.Diagnostics.Debug.WriteLine(touch.State.ToString());
                }

            }
            
            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(Color.CornflowerBlue);

            // TODO: Add your drawing code here

            base.Draw(gameTime);
        }
    }
}

using Microsoft.Xna.Framework;

using Microsoft.Xna.Framework.Graphics;

namespace MyTouchPanel

{

/// <summary>

/// This is the main type for your game.

/// </summary>

public class Game1 : Game

{

GraphicsDeviceManager graphics;

SpriteBatch spriteBatch;

public Game1()

{

graphics = new GraphicsDeviceManager(this);

Content.RootDirectory = "Content";

IsMouseVisible = true;

Microsoft.Xna.Framework.Input.Touch.TouchPanel.EnableMouseTouchPoint = true;

}

/// <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

}

/// <summary>

/// UnloadContent will be called once per game and is the place to unload

/// game-specific 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)

{

// TODO: Add your update logic here

var touches = Microsoft.Xna.Framework.Input.Touch.TouchPanel.GetState();

foreach (var touch in touches)

{

if (touch.State != Microsoft.Xna.Framework.Input.Touch.TouchLocationState.Released)

{

System.Diagnostics.Debug.WriteLine(touch.State.ToString());

}

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(Color.CornflowerBlue);

// TODO: Add your drawing code here

base.Draw(gameTime);

}

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原创文章，转载请注明本文链接地址(违者必究):C#开发跨平台游戏——在MONOGAME/XNA中使用触控操作TouchPanel

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