IOS游戏开发之五子棋OC版

先上效果图

- 功能展示

- 初高级棋盘切换效果

实现思路及主要代码详解

1.绘制棋盘

利用quartz2d绘制棋盘.代码如下

- (void)drawbackground:(cgsize)size{
     
    self.gridwidth = (size.width - 2 * kboardspace) / self.gridcount;
     
    //1.开启图像上下文
    uigraphicsbeginimagecontext(size);
    //2.获取上下文
    cgcontextref ctx = uigraphicsgetcurrentcontext();
     
    cgcontextsetlinewidth(ctx, 0.8f);
    //3.1 画16条竖线
    for (int i = 0; i <= self.gridcount; i ++) {
      cgcontextmovetopoint(ctx, kboardspace + i * self.gridwidth , kboardspace);
      cgcontextaddlinetopoint(ctx, kboardspace + i * self.gridwidth , kboardspace + self.gridcount * self.gridwidth);
    }
    //3.1 画16条横线
    for (int i = 0; i <= self.gridcount; i ++) {
      cgcontextmovetopoint(ctx, kboardspace, kboardspace + i * self.gridwidth );
      cgcontextaddlinetopoint(ctx, kboardspace + self.gridcount * self.gridwidth , kboardspace + i * self.gridwidth);
    }
    cgcontextstrokepath(ctx);
     
    //4.获取生成的图片
    uiimage *image=uigraphicsgetimagefromcurrentimagecontext();
    //5.显示生成的图片到imageview
    uiimageview * imageview = [[uiimageview alloc]initwithimage:image];
    [self addsubview:imageview];
    uigraphicsendimagecontext();
}

2.点击棋盘落子

     1）根据落子位置求出该棋子的行号与列号.

     2）判断落子位置是否已经有棋子,有则不能下.如果没有,将棋子保存在字典中,以列号和行号组合起来的字符串为key值.

代码如下：

//点击棋盘,下棋
  - (void)tapboard:(uitapgesturerecognizer *)tap{
   
    cgpoint point = [tap locationinview:tap.view];
    //计算下子的列号行号
    nsinteger col = (point.x - kboardspace + 0.5 * self.gridwidth) / self.gridwidth;
    nsinteger row = (point.y - kboardspace + 0.5 * self.gridwidth) / self.gridwidth;
    nsstring * key = [nsstring stringwithformat:@"%ld-%ld",col,row];
    if (![self.chessmandict.allkeys containsobject:key]) {
      uiview * chessman = [self chessman];
      chessman.center = cgpointmake(kboardspace + col * self.gridwidth, kboardspace + row * self.gridwidth);
      [self addsubview:chessman];
      [self.chessmandict setvalue:chessman forkey:key];
      self.lastkey = key;
      //检查游戏结果
      [self checkresult:col androw:row andcolor:self.isblack];
      self.isblack = !self.isblack;
    }
  }

3.检测游戏结果

每落一个棋子就要多游戏结果进行一次检查,判断四个方向上是否有大于等于5个同色的棋子连成一线,有则提示游戏输赢结果,无则游戏继续.算法为,从当前棋子位置向前遍历,直到遇到与自己不同色的棋子,累加同色棋子的个数,再往后遍历,直到遇到与自己不同色的棋子,累加同色棋子的个数.得到该方向相连同色棋子的总个数

代码如下

//判断是否大于等于五个同色相连
  - (bool)checkresult:(nsinteger)col androw:(nsinteger)row andcolor:(bool)isblack anddirection:(gmkdirection)direction{
   
    if (self.samechessmanarray.count >= 5) {
      return yes;
    }
    uicolor * currentchessmancolor = [self.chessmandict[[nsstring stringwithformat:@"%ld-%ld",col,row]] backgroundcolor];
    [self.samechessmanarray addobject:self.chessmandict[self.lastkey]];
    switch (direction) {
      //水平方向检查结果
      case gmkhorizontal:{
        //向前遍历
        for (nsinteger i = col - 1; i > 0; i --) {
          nsstring * key = [nsstring stringwithformat:@"%ld-%ld",i,row];
          if (![self.chessmandict.allkeys containsobject:key] || [self.chessmandict[key] backgroundcolor] != currentchessmancolor) break;
          [self.samechessmanarray addobject:self.chessmandict[key]];
        }
        //向后遍历
        for (nsinteger i = col + 1; i < kgridcount; i ++) {
          nsstring * key = [nsstring stringwithformat:@"%ld-%ld",i,row];
          if (![self.chessmandict.allkeys containsobject:key] || [self.chessmandict[key] backgroundcolor] != currentchessmancolor) break;
          [self.samechessmanarray addobject:self.chessmandict[key]];
        }
        if (self.samechessmanarray.count >= 5) {
          [self alertresult];
          return yes;
        }
        [self.samechessmanarray removeallobjects];
         
      }
        break;
      case gmkvertical:{
        //向前遍历
        for (nsinteger i = row - 1; i > 0; i --) {
          nsstring * key = [nsstring stringwithformat:@"%ld-%ld",col,i];
          if (![self.chessmandict.allkeys containsobject:key] || [self.chessmandict[key] backgroundcolor] != currentchessmancolor) break;
          [self.samechessmanarray addobject:self.chessmandict[key]];
        }
        //向后遍历
        for (nsinteger i = row + 1; i < kgridcount; i ++) {
          nsstring * key = [nsstring stringwithformat:@"%ld-%ld",col,i];
          if (![self.chessmandict.allkeys containsobject:key] || [self.chessmandict[key] backgroundcolor] != currentchessmancolor) break;
          [self.samechessmanarray addobject:self.chessmandict[key]];
        }
        if (self.samechessmanarray.count >= 5) {
          [self alertresult];
          return yes;
        }
        [self.samechessmanarray removeallobjects];
         
      }
        break;
      case gmkobliquedown:{
         
        //向前遍历
        nsinteger j = col - 1;
        for (nsinteger i = row - 1; i >= 0; i--,j--) {
          nsstring * key = [nsstring stringwithformat:@"%ld-%ld",j,i];
          if (![self.chessmandict.allkeys containsobject:key] || [self.chessmandict[key] backgroundcolor] != currentchessmancolor || j < 0) break;
          [self.samechessmanarray addobject:self.chessmandict[key]];
        }
        //向后遍历
        j = col + 1;
        for (nsinteger i = row + 1 ; i < kgridcount; i++,j++) {
          nsstring * key = [nsstring stringwithformat:@"%ld-%ld",j,i];
          if (![self.chessmandict.allkeys containsobject:key] || [self.chessmandict[key] backgroundcolor] != currentchessmancolor || j > kgridcount) break;
          [self.samechessmanarray addobject:self.chessmandict[key]];
        }
        if (self.samechessmanarray.count >= 5) {
          [self alertresult];
          return yes;
        }
        [self.samechessmanarray removeallobjects];
         
       
      }
        break;
      case gmkobliqueup:{
        //向前遍历
        nsinteger j = col + 1;
        for (nsinteger i = row - 1; i >= 0; i--,j++) {
          nsstring * key = [nsstring stringwithformat:@"%ld-%ld",j,i];
          if (![self.chessmandict.allkeys containsobject:key] || [self.chessmandict[key] backgroundcolor] != currentchessmancolor || j > kgridcount) break;
          [self.samechessmanarray addobject:self.chessmandict[key]];
        }
        //向后遍历
        j = col - 1;
        for (nsinteger i = row + 1 ; i < kgridcount; i++,j--) {
          nsstring * key = [nsstring stringwithformat:@"%ld-%ld",j,i];
          if (![self.chessmandict.allkeys containsobject:key] || [self.chessmandict[key] backgroundcolor] != currentchessmancolor || j < 0) break;
          [self.samechessmanarray addobject:self.chessmandict[key]];
        }
        if (self.samechessmanarray.count >= 5) {
          [self alertresult];
          return yes;
        }
        [self.samechessmanarray removeallobjects];
         
      }
        break;
    }
    return no;
  }

对外提供,重新开始,悔棋,切换初高级棋盘的三个接口

重新开始

- (void)newgame{
     
    self.isover = no;
    self.lastkey = nil;
    [self.samechessmanarray removeallobjects];
    self.userinteractionenabled = yes;
    [self.chessmandict removeallobjects];
    for (uiview * view in self.subviews) {
      if ([view iskindofclass:[uiimageview class]]) {
        continue;
      }
      [view removefromsuperview];
    }
    self.isblack = no;
  }

悔棋

//撤回至上一步棋
  - (void)backonestep:(uibutton *)sender{
   
    if(self.isover) return;
     
    if (self.lastkey == nil) {
      sender.enabled = no;
      cgfloat width = screen_width * 0.4 * screen_width_ratio;
      uiview * tip = [[uiview alloc]initwithframe:cgrectmake(0, 0, width, 0.6 * width)];
      tip.backgroundcolor = [uicolor colorwithwhite:1 alpha:0.8];
      tip.layer.cornerradius = 8.0f;
      [self addsubview:tip];
      tip.center = cgpointmake(self.width * 0.5, self.height * 0.5);
      uilabel * label = [[uilabel alloc]init];
      label.text = self.chessmandict.count > 0 ? @"只能悔一步棋!!!" : @"请先落子!!!";
      label.font = [uifont systemfontofsize:15];
      [label sizetofit];
      label.center = cgpointmake(tip.width * 0.5, tip.height * 0.5);
      [tip addsubview:label];
       
      self.userinteractionenabled = no;
      dispatch_after(dispatch_time(dispatch_time_now, (int64_t)(2.0 * nsec_per_sec)), dispatch_get_main_queue(), ^{
        self.userinteractionenabled = yes;
        sender.enabled = yes;
        [tip removefromsuperview];
         
      });
      return;
    }
    [self.chessmandict removeobjectforkey:self.lastkey];
    [self.subviews.lastobject removefromsuperview];
    self.isblack = !self.isblack;
    self.lastkey = nil;
  }

切换初高级键盘

//改变键盘级别
  - (void)changeboardlevel{
     
    for (uiview * view in self.subviews) {
      [view removefromsuperview];
    }
    [self newgame];
    self.ishighlevel = !self.ishighlevel;
    [self drawbackground:self.bounds.size];
  }

demo中的一个小技巧

用字典存放棋子,以棋子的列号和行号组合起来的字符串为key值,value值为棋子view.这样处理,在判断某行某列是否有棋子就非常简单了。

总结

以上就是ios游戏开发之五子棋oc版的全部内容，希望本文对大家开发ios有所帮助，如果本文有不足之处,欢迎大家提供建议和指点！