微信小程序五子棋游戏的棋盘，重置，对弈实现方法【附demo源码下载】

drawLine(arr){
 arr.forEach(current => {
  this.ctx.setFillStyle(this.lineColor);
  this.ctx.beginPath();
  this.ctx.lineWidth = 1;
  this.ctx.moveTo(current[0].x, current[0].y);
  for (var i = 1; i < current.length; i++) {
  this.ctx.lineTo(current[i].x, current[i].y);
  }
  this.ctx.stroke();
  this.ctx.closePath();
  this.ctx.draw(true);
 });
 }
 drawChessboard(){
 // 每个格子的宽高
 var everyLen = this.everyLen;
 // 标记坐标的个数
 var count = 0;
 // 从纵向保存坐标
 var arrY = [];
 // 双循环计算每个坐标的横纵坐标
 for(var i = 0;i <= this.type; i++){
  var arr = [],arr0 = [];
  for(var j = 0;j <= this.type; j++){
  count++;
  arr.push({
   y: this.margin + i * everyLen,
   x: this.margin + j * everyLen,
   pointX: j,
   pointY: i,
   index: count
  });
  arr0.push({
   x: this.margin + i * everyLen,
   y: this.margin + j * everyLen
  })
  }
  // 清空canvas
  this.ctx.clearRect(0, 0, this.width, this.height);
  // 保存横线坐标和竖线坐标
  this.everyPoint.push(arr);
  arrY.push(arr0);
 }
 // 绘制横向线
 this.drawLine(this.everyPoint);
 // 绘制竖向线
 this.drawLine(arrY);
 }

// 获取当前点击位置的坐标
 getPosition(e){
 return {
  x: e.touches[0].x,
  y: e.touches[0].y
 };
 }
 // 将当前坐标和棋盘坐标数组对比，找到精确坐标
 checkPoint(arr,po){
 for (var i = 0; i < this.everyPoint.length; i++){
  for (var j = 0; j < this.everyPoint[i].length; j++){
  if (Math.abs(this.everyPoint[i][j].x - po.x) < this.everyLen/2 && Math.abs(this.everyPoint[i][j].y - po.y) < this.everyLen/2){
   // 将棋盘精确坐标保存到当前持棋方数组
   arr.push(this.everyPoint[i][j]);
   // 同时删除棋盘坐标数组的该值，表示当前位置已经存在棋子
   this.everyPoint[i].splice(j,1);
   break;
  }
  }
 }
 }
 // 绘制当前坐标棋子
 drawCle(opts,color){
 this.ctx.setFillStyle(color);
 this.ctx.beginPath();
 this.ctx.arc(opts.x, opts.y, this.r, 0, Math.PI * 2, true);
 this.ctx.closePath();
 this.ctx.fill();
 this.ctx.draw(true);
 }
 drawLastPoint(type){
 // 判断是黑方持棋还是白方持棋，进行绘制棋子
 if(type == 'AI'){
  this.AIPoint.forEach((current, index) => {
  this.drawCle(current, '#000000');
  });
 }else{
  this.myPoint.forEach((current, index) => {
  this.drawCle(current, '#ffffff');
  });
 }
 }
 this.page.changeTouchStart = function (e) {
  // 判断游戏是否开始
  if (self.START_GAME){
  // 获取当前坐标
  var newPo = self.getPosition(e);
  // 获取棋盘精确坐标
  if (!self.boolAI && self.boolMy) {
   self.checkPoint(self.myPoint, newPo);
  } else if (self.boolAI && !self.boolMy) {
   self.checkPoint(self.AIPoint, newPo);
  }
  }
 }
 this.page.changeTouchEnd = function (e) {
  if (self.START_GAME) {
  // 绘制棋子
  if (!self.boolAI && self.boolMy) {
   self.boolAI = !self.boolAI;
   self.boolMy = !self.boolMy;
   self.drawLastPoint('PO');
   // 判断白棋是否五子胜利
   if (self.myPoint.length >= 5 && self.checkWinner(self.myPoint)){
   wx.showToast({title: '白棋胜利！'});
   self.START_GAME = false;
   }
  } else if (self.boolAI && !self.boolMy) {
   self.boolAI = !self.boolAI;
   self.boolMy = !self.boolMy;
   self.drawLastPoint('AI');
   // 判断黑棋是否五子胜利
   if(self.AIPoint.length >= 5 && self.checkWinner(self.AIPoint)){
   wx.showToast({ title: '黑棋胜利！' });
   self.START_GAME = false;
   }
  }
  }
 }

checkTransverse(arr,po){//横向检查
 var len = arr.length - 1;
 var count = 1;
 // 东
 for(var i = 1; i < this.CHESS_LEN ; i++){
  for (var j = 0; j < len; j++){
  if(arr[j].pointX == po.pointX - i && arr[j].pointY == po.pointY){
   count++;
  }
  }
 }
 if (count == this.CHESS_LEN) { return true;}
 // 西
 for (var i = 1; i < this.CHESS_LEN; i++) {
  for (var j = 0; j < len; j++) {
  if (arr[j].pointX == po.pointX + i && arr[j].pointY == po.pointY) {
   count++;
  }
  }
 }
 if (count == this.CHESS_LEN) { return true; }
 }
 checkPortrait(arr,po){//纵向检查
 var len = arr.length - 1;
 var count = 1;
 // 南
 for (var i = 1; i < this.CHESS_LEN; i++) {
  for (var j = 0; j < len; j++) {
  if (arr[j].pointX == po.pointX && arr[j].pointY == po.pointY - i) {
   count++;
  }
  }
 }
 if (count == this.CHESS_LEN) { return true; }
 // 北
 for (var i = 1; i < this.CHESS_LEN; i++) {
  for (var j = 0; j < len; j++) {
  if (arr[j].pointX == po.pointX && arr[j].pointY == po.pointY + i) {
   count++;
  }
  }
 }
 if (count == this.CHESS_LEN) { return true; }
 }
 checkNortheast(arr,po){//45度
 var len = arr.length - 1;
 var count = 1;
 // 西南
 for (var i = 1; i < this.CHESS_LEN; i++) {
  for (var j = 0; j < len; j++) {
  if (arr[j].pointX == po.pointX - i && arr[j].pointY == po.pointY - i) {
   count++;
  }
  }
 }
 if (count == this.CHESS_LEN) { return true; }
 // 东北
 for (var i = 1; i < this.CHESS_LEN; i++) {
  for (var j = 0; j < len; j++) {
  if (arr[j].pointX == po.pointX + i && arr[j].pointY == po.pointY + i) {
   count++;
  }
  }
 }
 if (count == this.CHESS_LEN) { return true; }
 }
 checkNorthwest(arr,po){//135度
 var len = arr.length - 1;
 var count = 1;
 // 西北
 for (var i = 1; i < this.CHESS_LEN; i++) {
  for (var j = 0; j < len; j++) {
  if (arr[j].pointX == po.pointX - i && arr[j].pointY == po.pointY + i) {
   count++;
  }
  }
 }
 if (count == this.CHESS_LEN) { return true; }
 // 东南
 for (var i = 1; i < this.CHESS_LEN; i++) {
  for (var j = 0; j < len; j++) {
  if (arr[j].pointX == po.pointX + i && arr[j].pointY == po.pointY - i) {
   count++;
  }
  }
 }
 if (count == this.CHESS_LEN) { return true; }
 }
 checkWinner(arr){
 var currentPo = arr[arr.length - 1];
 var win1 = this.checkTransverse(arr, currentPo);
 var win2 = this.checkPortrait(arr, currentPo);
 var win3 = this.checkNortheast(arr, currentPo);
 var win4 = this.checkNorthwest(arr, currentPo);
 if (win1 || win2 || win3 || win4){
  return true;
 }else{
  return false;
 }
 }

resetChessBoard(){
 this.page.setData({ isHide: false });
 this.init();
}
this.page.changeReset = function(e){
 self.resetChessBoard();
}