微信小程式之貪吃蛇遊戲實現方法

本文主要介紹了微信小程式實現的貪吃蛇遊戲,結合實例形式分析了微信小程式實現貪吃蛇遊戲功能的相關界面佈局與代碼邏輯操作技巧,並附帶源碼供讀者下載參考,需要的朋友可以參考下，希望能幫助大家。

本文實例講述了微信小程式實現的貪吃蛇遊戲。分享給大家供大家參考，具體如下：

先來看看運行效果：

具體程式碼如下：

介面佈局pages/snake/snake/snake.wxml:

<!--snake.wxml-->
<view class="control" bindtouchstart="tapStart" bindtouchmove="tapMove" bindtouchend="tapEnd">
<view class="score">
  <view class="title">snake</view>
  <view class="scoredetail">
    <view class="scoredesc">得分</view>
    <view class="scorenumber">{{score}}</view>
  </view>
  <view class="scoredetail">
    <view class="scoredesc">历史最高</view>
    <view class="scorenumber">{{maxscore}}</view>
  </view>
</view>
<view class="ground">
  <view wx:for="{{ground}}" class="rows" wx:for-item="cols">
    <view wx:for="{{cols}}" class="block block_{{item}}" >
    </view>
  </view>
</view>
<modal class="modal" hidden="{{modalHidden}}" no-cancel bindconfirm="modalChange">
 <view> 游戏结束，重新开始吗？ </view>
</modal>
</view>

邏輯功能pages/snake/snake/snake.js:

#

//snake.js
var app = getApp();
Page({
  data:{
    score: 0,//比分
    maxscore: 0,//最高分
    startx: 0,
    starty: 0,
    endx:0,
    endy:0,//以上四个做方向判断来用
    ground:[],//存储操场每个方块
    rows:28,
    cols:22,//操场大小
    snake:[],//存蛇
    food:[],//存食物
    direction:'',//方向
    modalHidden: true,
    timer:''
  } ,
  onLoad:function(){
    var maxscore = wx.getStorageSync('maxscore');
    if(!maxscore) maxscore = 0
    this.setData({
    maxscore:maxscore
    });
    this.initGround(this.data.rows,this.data.cols);//初始化操场
    this.initSnake(3);//初始化蛇
    this.creatFood();//初始化食物
    this.move();//蛇移动
  },
  //计分器
  storeScore:function(){
   if(this.data.maxscore < this.data.score){
   this.setData({
    maxscore:this.data.score
    })
    wx.setStorageSync(&#39;maxscore&#39;, this.data.maxscore)
   }
 },
 //操场
  initGround:function(rows,cols){
    for(var i=0;i<rows;i++){
      var arr=[];
      this.data.ground.push(arr);
      for(var j=0;j<cols;j++){
        this.data.ground[i].push(0);
      }
    }
  },
  //蛇
  initSnake:function(len){
    for(var i=0;i<len;i++){
      this.data.ground[0][i]=1;
      this.data.snake.push([0,i]);
    }
  },
  //移动函数
  move:function(){
    var that=this;
    this.data.timer=setInterval(function(){
      that.changeDirection(that.data.direction);
      that.setData({
        ground:that.data.ground
      });
    },400);
  },
  tapStart: function(event){
    this.setData({
      startx: event.touches[0].pageX,
      starty: event.touches[0].pageY
      })
  },
  tapMove: function(event){
    this.setData({
      endx: event.touches[0].pageX,
      endy: event.touches[0].pageY
      })
  },
  tapEnd: function(event){
    var heng = (this.data.endx) ? (this.data.endx - this.data.startx) : 0;
    var shu = (this.data.endy) ? (this.data.endy - this.data.starty) : 0;
    if(Math.abs(heng) > 5 || Math.abs(shu) > 5){
      var direction = (Math.abs(heng) > Math.abs(shu)) ? this.computeDir(1, heng):this.computeDir(0, shu);
      switch(direction){
      case &#39;left&#39;:
        if(this.data.direction==&#39;right&#39;)return;
        break;
      case &#39;right&#39;:
        if(this.data.direction==&#39;left&#39;)return;
        break;
      case &#39;top&#39;:
        if(this.data.direction==&#39;bottom&#39;)return;
        break;
      case &#39;bottom&#39;:
        if(this.data.direction==&#39;top&#39;)return;
        break;
      default:
    }
    this.setData({
    startx:0,
    starty:0,
    endx:0,
    endy:0,
    direction:direction
    })
  }
  },
  computeDir: function(heng, num){
  if(heng) return (num > 0) ? &#39;right&#39; : &#39;left&#39;;
  return (num > 0) ? &#39;bottom&#39; : &#39;top&#39;;
  },
  creatFood:function(){
    var x=Math.floor(Math.random()*this.data.rows);
    var y=Math.floor(Math.random()*this.data.cols);
    var ground= this.data.ground;
    ground[x][y]=2;
    this.setData({
      ground:ground,
      food:[x,y]
    });
  },
  changeDirection:function(dir){
    switch(dir){
    case &#39;left&#39;:
      return this.changeLeft();
      break;
    case &#39;right&#39;:
      return this.changeRight();
      break;
    case &#39;top&#39;:
      return this.changeTop();
      break;
    case &#39;bottom&#39;:
      return this.changeBottom();
      break;
    default:
    }
  },
  changeLeft:function(){
    var arr=this.data.snake;
    var len=this.data.snake.length;
    var snakeHEAD=arr[len-1][1];
    var snakeTAIL=arr[0];
    var ground=this.data.ground;
    ground[snakeTAIL[0]][snakeTAIL[1]]=0; 
    for(var i=0;i<len-1;i++){
        arr[i]=arr[i+1];  
    };
    var x=arr[len-1][0];
    var y=arr[len-1][1]-1;
    arr[len-1]=[x,y];
      this.checkGame(snakeTAIL);
    for(var i=1;i<len;i++){
      ground[arr[i][0]][arr[i][1]]=1;
    } 
  this.setData({
        ground:ground,
      snake:arr
    });
    return true;
  },
  changeRight:function(){
    var arr=this.data.snake;
    var len=this.data.snake.length;
    var snakeHEAD=arr[len-1][1];
    var snakeTAIL=arr[0];
    var ground=this.data.ground;
    ground[snakeTAIL[0]][snakeTAIL[1]]=0; 
    for(var i=0;i<len-1;i++){
        arr[i]=arr[i+1];  
    };
    var x=arr[len-1][0];
    var y=arr[len-1][1]+1;
    arr[len-1]=[x,y];
    this.checkGame(snakeTAIL);
    for(var i=1;i<len;i++){
      ground[arr[i][0]][arr[i][1]]=1;
    } 
    this.setData({
        ground:ground,
      snake:arr
    });
  //  var y=this.data.snake[0][1];
  //  var x=this.data.snake[0][0];
  //   this.data.ground[x][y]=0;
  //   console.log(this.data.ground[x]);
  //   console.log(this.data.snake);
  //   for(var i=0;i<this.data.snake.length-1;i++){
  //     this.data.snake[i]=this.data.snake[i+1];
  //   }
  //   this.data.snake[this.data.snake.length-1][1]++;
  //   for(var j=1;j<this.data.snake.length;j++){
  //     this.data.ground[this.data.snake[j][0]][this.data.snake[j][1]]=1;
  //   }
    return true;
  },
  changeTop:function(){
    var arr=this.data.snake;
    var len=this.data.snake.length;
    var snakeHEAD=arr[len-1][1];
    var snakeTAIL=arr[0];
    var ground=this.data.ground;
    ground[snakeTAIL[0]][snakeTAIL[1]]=0; 
    for(var i=0;i<len-1;i++){
        arr[i]=arr[i+1];  
    };
    var x=arr[len-1][0]-1;
    var y=arr[len-1][1];
    arr[len-1]=[x,y];
      this.checkGame(snakeTAIL);
    for(var i=1;i<len;i++){
      ground[arr[i][0]][arr[i][1]]=1;
    } 
    this.setData({
      ground:ground,
      snake:arr
    });
    return true;
  },
  changeBottom:function(){
    var arr=this.data.snake;
    var len=this.data.snake.length;
    var snakeHEAD=arr[len-1];
    var snakeTAIL=arr[0];
    var ground=this.data.ground;
    ground[snakeTAIL[0]][snakeTAIL[1]]=0; 
    for(var i=0;i<len-1;i++){
        arr[i]=arr[i+1];  
    };
    var x=arr[len-1][0]+1;
    var y=arr[len-1][1];
    arr[len-1]=[x,y];
    this.checkGame(snakeTAIL);
    for(var i=1;i<len;i++){
      ground[arr[i][0]][arr[i][1]]=1;
    } 
    this.setData({
      ground:ground,
      snake:arr
    });
    return true;
  },
  checkGame:function(snakeTAIL){
    var arr=this.data.snake;
    var len=this.data.snake.length;
    var snakeHEAD=arr[len-1];
    if(snakeHEAD[0]<0||snakeHEAD[0]>=this.data.rows||snakeHEAD[1]>=this.data.cols||snakeHEAD[1]<0){
        clearInterval(this.data.timer);
          this.setData({
          modalHidden: false,
            }) 
    }
    for(var i=0;i<len-1;i++){
      if(arr[i][0]==snakeHEAD[0]&&arr[i][1]==snakeHEAD[1]){
        clearInterval(this.data.timer);
          this.setData({
            modalHidden: false,
          })
      }
    }
    if(snakeHEAD[0]==this.data.food[0]&&snakeHEAD[1]==this.data.food[1]){
      arr.unshift(snakeTAIL);
      this.setData({
        score:this.data.score+10
      });
      this.storeScore();
      this.creatFood();
    }
  },
  modalChange:function(){
  this.setData({
      score: 0,
    ground:[],
    snake:[],
      food:[],
      modalHidden: true,
      direction:&#39;&#39;
  })
  this.onLoad();
  }
});

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