WeChat mini program version 2048 mini game

var disX = this.touchStartX - this.touchEndX;
    var absdisX = Math.abs(disX);
    var disY = this.touchStartY - this.touchEndY;
    var absdisY = Math.abs(disY);  
    // 确定移动方向 // 0:上, 1:右, 2:下, 3:左 var direction = absdisX > absdisY ? (disX < 0 ? 1 : 3) : (disY < 0 ? 2 : 0);

// 比如棋盘数据如下 var grid = [
    [2, 2, 0, 0],
    [0, 0, 0, 0],
    [0, 8, 4, 0],
    [0, 0, 0, 0]
];

var list = [
    [0, 0, 2, 2],  // 注意是0022不是2200，因为像右滑动所以从右边push入数组
    [0, 0, 0, 0],
    [0, 4, 8, 0],
    [0, 0, 0, 0]
];

formList(dir) {  // 根据传入的滑动方向生成list的四个数组 var list = [[], [], [], []];
    for(var i = 0; i < this.size; i++)
      for(var j = 0; j < this.size; j++) {
        switch(dir) {
          case 0:
            list[i].push(this.board.grid[j][i]);
            break;
          case 1:
            list[i].push(this.board.grid[i][this.size-1-j]);
            break;
          case 2:
            list[i].push(this.board.grid[this.size-1-j][i]);
            break;
          case 3:
            list[i].push(this.board.grid[i][j]);
            break;
        }
      }
    return list;
  }

list2 = [
    [2, 2, 0, 0], 
    [0, 0, 0, 0],
    [4, 8, 0, 0],
    [0, 0, 0, 0]
];

changeItem(item) {  // 将 [0, 2, 0, 2] 改为 [2, 2, 0, 0] var cnt = 0;
    for(var i = 0; i < item.length; i++)
      if(item[i] != 0)
        item[cnt++] = item[i];
    for(var j = cnt; j < item.length; j++) 
      item[j] = 0;
    return item;
  }

list2 = [
    [4, 0, 0, 0], 
    [0, 0, 0, 0],
    [4, 8, 0, 0],
    [0, 0, 0, 0]
];

combine(list) { // 滑动时相同的合并 for(var i = 0; i < list.length; i++)  // 数字靠边
      list[i] = this.changeItem(list[i]);
    for(var i = 0; i < this.size; i++) { 
      for(var j = 1; j < this.size; j++) {
        if(list[i][j-1] == list[i][j] && list[i][j]!=0) {
          list[i][j-1] += list[i][j];
          list[i][j] = 0; 
        }
      }
    }
    for (var i = 0; i < list.length; i++)  // 再次数字靠边，避免0220变成0400的情况发生
      list[i] = this.changeItem(list[i]);
    return list;
  }

move(dir) {
    // 0:上, 1:右, 2:下, 3:左 var curList = this.formList(dir);
    var list = this.combine(curList); 
    var result = [[],[],[],[]];
    for(var i = 0; i < this.size; i++)
      for(var j = 0; j < this.size; j++) {
        switch (dir) {
          case 0:
            result[i][j] = list[j][i];
            break;
          case 1:
            result[i][j] = list[i][this.size-1-j];
            break;
          case 2:
            result[i][j] = list[j][this.size-1-i];
            break;
          case 3:
            result[i][j] = list[i][j];
            break;
        }
      } 
    this.board.grid = result;
    this.setDataRandom();  // 移动一次之后随机用2或4填充两个单元格 return result;
  }

isOver() {  // 游戏是否结束，结束条件：可用格子为空且所有格子上下左右值不等 for (var i = 0; i < this.size; i++) // 左右不等 for (var j = 1; j < this.size; j++) {
      if (this.board.grid[i][j] == this.board.grid[i][j - 1])
        return false;
    }
  for (var j = 0; j < this.size; j++)  // 上下不等 for (var i = 1; i < this.size; i++) {
      if (this.board.grid[i][j] == this.board.grid[i - 1][j])
        return false;
    }
  return true;
}