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众所周知目前影院选座是不允许随便选的，我们不可以任性的挑三拣四，最后留下N个单独的座位，目的就是要留下至少2个连着的座位；
另外有些影院的座位摆放并不是规则的，有些座位被过道或者特殊座位分割开，产生了不同的分区，这里就实现检测有没有座位变成了孤座，
孤座的含义简单说就是两个小情侣不能挨着坐了~
但是也存在特殊情况，及因为分区的缘故，某一排连着的座位只有2个，或者只有3个，这时候还是可以允许人家买其中之一，或者之二的~
好，条件说完之后，开始介绍数据结构，正常情况下，影院的每一个座位数据会包含坐标，座位号，如x，y，row，column。
其中，影厅中的面积会以单个座位的大小被分割成M*N的坐标系，即过道也有它的坐标；而row和column才是真正的座位；
啰嗦了半天，下面上代码：
入口函数是verifySelectedSeatsWithSeatsDic，
1. 参数seatsDic是一个字典，注意该字典过滤掉了非座位的数据！（字典是本项目所需，你可以直接用一个array，方法中我也是获取了array；注意座位数据的顺序一定是有序的，这样才能获取到一个座位的左右座位）
2. 每个座位的数据我封装成了一个WCSeatButton，并提供了isSeatAvailable方法判断该座位是否可以被购买（未被售出）
3. 函数getNearBySeatsInSameRowForSeat负责获取没有被过道等非座位隔开的所有座位
4. 函数(BOOL)isSeat:(WCSeatButton *)s1 nearBySeatWithoutRoad:(WCSeatButton *)s2判断两个座位是否被过道隔开
-(BOOL)verifySelectedSeatsWithSeatsDic:(NSDictionary *)seatsDic { NSArray *seatBtns = [seatsDic allValues]; if ([seatBtns count] > 0) { for (WCSeatButton *btn in seatBtns) { //查看可选座位是否落单 if([btn isSeatAvailable]){ int idx = btn.seatIndex; WCSeatButton *preBtn = [seatsDic objectForKey:[NSString stringWithFormat:@"%i", idx - 1]]; WCSeatButton *nextBtn = [seatsDic objectForKey:[NSString stringWithFormat:@"%i", idx + 1]]; //检验是否存在相邻座位 and 可用 BOOL isPreOK = preBtn != nil && [preBtn.serviceSeat.row isEqualToString:btn.serviceSeat.row] && [preBtn isSeatAvailable]; BOOL isNextOK = nextBtn != nil && [nextBtn.serviceSeat.row isEqualToString:btn.serviceSeat.row]&& [nextBtn isSeatAvailable] ; //再判断同一分区 if (isPreOK) { isPreOK = ABS([btn.serviceSeat.yCoord intValue] - [preBtn.serviceSeat.yCoord intValue]) == 1; } if (isNextOK) { isNextOK = ABS([btn.serviceSeat.yCoord intValue] - [nextBtn.serviceSeat.yCoord intValue]) == 1; } if (!isPreOK && !isNextOK) { NSArray *nearBySeats = [self getNearBySeatsInSameRowForSeat:btn withSeatsDic:seatsDic]; //例外 两个座位只选一个 if ([nearBySeats count] == 2) { continue; } //例外 3个座位中2个连续被选，剩下单个座位 if ([nearBySeats count] == 3) { int idx = [nearBySeats indexOfObject:btn]; //空座位如果在两边说明中间的座位已经被选，则只要还有一个被选就可以 if (idx == 0 && ![nearBySeats[2] isSeatAvailable]) { continue; }else if(idx == 2 && ![nearBySeats[0] isSeatAvailable]) { continue; } } //只限制当前用户选择的座位，防止其他渠道产生孤座导致当前用户不能选座 for (WC630ServiceSeat *s in self.orderItem.seats) { if((preBtn && [[[preBtn serviceSeat] cineSeatId] isEqualToString:s.cineSeatId]) || (nextBtn && [[[nextBtn serviceSeat] cineSeatId] isEqualToString:s.cineSeatId]) ) { return NO; } } } } } } return YES; } -(NSArray *)getNearBySeatsInSameRowForSeat:(WCSeatButton *)seat withSeatsDic:(NSDictionary *)seatsDic{ NSMutableArray *result = [NSMutableArray array]; [result addObject:seat]; int idx = seat.seatIndex - 1; //left WCSeatButton *tmp= [seatsDic objectForKey:[NSString stringWithFormat:@"%i", idx]]; while([self isSeat:tmp nearBySeatWithoutRoad:seat]){ [result insertObject:tmp atIndex:0]; idx--; tmp = [seatsDic objectForKey:[NSString stringWithFormat:@"%i", idx]]; } idx = seat.seatIndex + 1; //right tmp= [seatsDic objectForKey:[NSString stringWithFormat:@"%i", idx]]; while([self isSeat:tmp nearBySeatWithoutRoad:seat]){ [result addObject:tmp]; idx++; tmp = [seatsDic objectForKey:[NSString stringWithFormat:@"%i", idx]]; } return result; } -(BOOL)isSeat:(WCSeatButton *)s1 nearBySeatWithoutRoad:(WCSeatButton *)s2{ return s1 != nil && [s1.serviceSeat.row isEqualToString:s2.serviceSeat.row] && ABS([s1.serviceSeat.yCoord intValue] - [s2.serviceSeat.yCoord intValue]) == ABS([s1.serviceSeat.column intValue] - [s2.serviceSeat.column intValue]) ; }
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原文地址：http://www.cnblogs.com/v-jing/p/4180129.html
