XNA游戏：软键盘弹窗输入

在XNA中如果我们需要输入文字，那么我们就需要使用到软键盘了，在XNA中使用软键盘要用到Guide.BeginShowKeyboardInput方法，由于游戏的Update是会不断地执行的，所以要由Guide.IsVisible来检查弹出输入框是否已经显示出来了。

Guide.BeginShowKeyboardInput方法的参数
PlayerIndex 玩家的编号，手机是PlayerIndex.One
Title 输入窗口的标题
Description 输入窗口的描述
DefaultText 默认的文字
Callback 回调的方法
State 使用者想要传送的物件

Guide.BeginShowMessageBox时弹出一个窗口没有软键盘输入，这个方法的参数分�e是
Title 窗口的标题
Text 窗口的文字
Buttons 按钮
FoucsButton 预设的按钮
Icon 图标
Callback 回调的方法
State 使用者想要传送的物件

 

示例

 

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.Input.Touch;
using Microsoft.Xna.Framework.Media;

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

        SpriteFont spriteFont;

        string sipTitle = "This is the title.";
        string sipDescription = "This is the description that goes beneath the title.";
        string sipResult = "You type stuff here.";

        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
            TargetElapsedTime = TimeSpan.FromTicks(333333);
        }

        protected override void Initialize()
        {
            base.Initialize();
        }

        protected override void LoadContent()
        {
            spriteBatch = new SpriteBatch(GraphicsDevice);
            spriteFont = Content.Load<SpriteFont>("SpriteFont1");
        }

        protected override void UnloadContent()
        {
        }
        /// <summary>
        /// 输入完成回调方法
        /// </summary>
        /// <param name="result"></param>
        void keyboardCallback(IAsyncResult result)
        {
            string retval = Guide.EndShowKeyboardInput(result);

            if (retval != null)
            {
                sipResult = retval;
            }
        }

        protected override void Update(GameTime gameTime)
        {
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();
            // Display the SIP
            TouchCollection touchCollection = TouchPanel.GetState();

            foreach (TouchLocation touch in touchCollection)
            {
                if (touch.State == TouchLocationState.Pressed)
                    if (!Guide.IsVisible)
                        //弹出软键盘输入框
                        Guide.BeginShowKeyboardInput(PlayerIndex.One, sipTitle, sipDescription,
                            sipResult, keyboardCallback, new object());
            }

            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.CornflowerBlue);

            //绘制界面的文字
            spriteBatch.Begin();
            spriteBatch.DrawString(spriteFont, sipResult, new Vector2 { X = 50, Y = 200 }, Color.Black);
            spriteBatch.End();

            base.Draw(gameTime);
        }
    }
}