C#开发跨平台游戏——在MONOGAME/XNA中使用触控手势Gesture
上一篇我介绍了在MonoGame/XNA中触控（触摸）操作，今天这一篇是对触控(触摸)的补充——手势（用手指单击，用手指双击，用手指拖拽，双手指捏合，双手指放大，用手指轻弹，用手指常按等）。
打开Visual Studio，【文件】【新建】【项目】
【MonoGame】【MonoGame Windows 10 Universal（XAML）Project】，项目名称命名为【MyTouchPanelGesture】，点击【确定】
【MonoGame Windows 10 Universal（XAML）Project】提供的Windows10模拟器可以很好的测试手势操作，你也可以选择【MonoGame Android Project】【MonoGame iOS Project】只要你有一台带触摸的设备这些都不问题。
为了支持windows10所有用户，最低版本选择【Windows 10 （10.0；版本10240）】，点击【确定】
打开解决方案管理器中的Game1.cs文件
在Update(GameTime gameTime)方法中加入以下代码：
while (Microsoft.Xna.Framework.Input.Touch.TouchPanel.IsGestureAvailable)//循环判断手势操作是否可用
{
var gesture = Microsoft.Xna.Framework.Input.Touch.TouchPanel.ReadGesture();//获取当前手势操作
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.DoubleTap)//判读该手势的类型是否双击
{
System.Diagnostics.Debug.WriteLine("DoubleTap");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.DragComplete)//判读该手势的类型是否拖拽结束
{
System.Diagnostics.Debug.WriteLine("DragComplete");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.Flick)//判读该手势的类型是否轻弹
{
System.Diagnostics.Debug.WriteLine("Flick");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.FreeDrag)//判读该手势的类型是否自由拖动
{
System.Diagnostics.Debug.WriteLine("FreeDrag");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.Hold)//判读该手势的类型是否长按
{
System.Diagnostics.Debug.WriteLine("Hold");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.HorizontalDrag)//判读该手势的类型是否左右滑动（拖动）
{
System.Diagnostics.Debug.WriteLine("HorizontalDrag");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.None)//无手势
{
System.Diagnostics.Debug.WriteLine("None");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.Pinch)//判读该手势的类型是否左右捏合
{
System.Diagnostics.Debug.WriteLine("Pinch");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.PinchComplete)//判读该手势的类型是否捏合完成
{
System.Diagnostics.Debug.WriteLine("PinchComplete");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.Tap)//判读该手势的类型是否触摸（点击屏幕）
{
System.Diagnostics.Debug.WriteLine("Tap");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.VerticalDrag)//判读该手势的类型是否上下滑动（拖动）
{
System.Diagnostics.Debug.WriteLine("VerticalDrag");
}
}
将【本地计算机】改为【模拟器】，点击【模拟器】运行
选择模拟器右侧的手型，这时候你会发现，无论点击蓝色窗口的任何位置，输出窗口都没有任何输出信息，这表示上面输入的代码没有被执行！
手势操作和之前的触控（触摸）有点不同，在使用之前必须显式打开一个开关：找到Game1类的构造方法，在方法体内加入：
TouchPanel.EnabledGestures = GestureType.DoubleTap| GestureType.DragComplete| GestureType.Flick| GestureType.FreeDrag| GestureType.Hold| GestureType.HorizontalDrag| GestureType.None| GestureType.Pinch| GestureType.PinchComplete| GestureType.Tap| GestureType.VerticalDrag;
建议：加入使用到的手势，每种手势用【|】隔开即可！比如只用到长按屏幕Hold，只需要加入：
TouchPanel.EnabledGestures = GestureType.Hold;
由于带完整名称名称空间太长，可以在Game1.cs顶部使用
using Microsoft.Xna.Framework.Input.Touch;
省略完整路径的写法。
点击【模拟器】运行
点击
左右滑动
上下滑动
双手指捏合
注：模拟器无法测试手指放大手势操作，这里还是建议用真机来开发游戏。可以用windows10平板
完整代码如下：
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input.Touch;
namespace MyTouchPanelGesture
{
/// <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";
TouchPanel.EnabledGestures = GestureType.DoubleTap | GestureType.DragComplete | GestureType.Flick | GestureType.FreeDrag | GestureType.Hold | GestureType.HorizontalDrag | GestureType.None | GestureType.Pinch | GestureType.PinchComplete | GestureType.Tap | GestureType.VerticalDrag;
}
/// <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
while (Microsoft.Xna.Framework.Input.Touch.TouchPanel.IsGestureAvailable)
{
var gesture = Microsoft.Xna.Framework.Input.Touch.TouchPanel.ReadGesture();
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.DoubleTap)
{
System.Diagnostics.Debug.WriteLine("DoubleTap");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.DragComplete)
{
System.Diagnostics.Debug.WriteLine("DragComplete");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.Flick)
{
System.Diagnostics.Debug.WriteLine("Flick");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.FreeDrag)
{
System.Diagnostics.Debug.WriteLine("FreeDrag");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.Hold)
{
System.Diagnostics.Debug.WriteLine("Hold");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.HorizontalDrag)
{
System.Diagnostics.Debug.WriteLine("HorizontalDrag");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.None)
{
System.Diagnostics.Debug.WriteLine("None");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.Pinch)
{
System.Diagnostics.Debug.WriteLine("Pinch");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.PinchComplete)
{
System.Diagnostics.Debug.WriteLine("PinchComplete");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.Tap)
{
System.Diagnostics.Debug.WriteLine("Tap");
}
if (gesture.GestureType == Microsoft.Xna.Framework.Input.Touch.GestureType.VerticalDrag)
{
System.Diagnostics.Debug.WriteLine("VerticalDrag");
}
}
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);
}
}
}