ios - 从字典数组中获取字典值的范围

Question

在我的响应JSON中，我需要从字典数组中解析一系列值。
这是我的回应，

“List”: [
      {
         "event_desc": "On"
      },
      {
         "event_desc": “Go”
      },
      {
         "event_desc": “Start”
      },
      {
         "event_desc": "Off”
      },
      {
         "event_desc": “Rework”
      },
      {
         "event_desc": "On"
      },
      {
         "event_desc": “Start”
      },
      {
         "event_desc": "Off”
      },
      {
         "event_desc": “Swipe”
      },
      {
         "event_desc": "On"
      },
      {
         "event_desc": “Work”
      },
      {
         "event_desc": “Repair”
      },
      {
         "event_desc": “Off”
      },
      {
         "event_desc": "On"
      }
]

在这里，我想按“开”和“关”的范围来分隔值
那是

list1=[ {event_desc:On},{event_desc:Go},{event_desc:Start},{event_desc:Off}]
list2=[{event_desc:On},{event_desc:Start},{event_desc:Off}]
list3= [{event_desc:On},{event_desc:Work},{event_desc:Repair},{event_desc:Off}]

帮帮我，谢谢

Answer 1

你可以做类似的事情，

NSArray *yourArr;   // posted in question
NSMutableArray *resultArr = [[NSMutableArray alloc]init];
NSMutableArray *tempArr = [[NSMutableArray alloc]init];
BOOL flag = NO;
for (int i = 0; i < yourArr.count; i++) {
    NSDictionary *dic = [yourArr objectAtIndex:i];
    if ([[dic objectForKey:@"event_desc"] isEqualToString:@"On"]) {
        flag = YES;
    }
    if (flag) {
        [tempArr addObject:dic];
    }
    if ([[dic objectForKey:@"event_desc"] isEqualToString:@"Off"]) {
        flag = NO;
        [resultArr addObject:[tempArr mutableCopy]];
        [tempArr removeAllObjects];
    }
}
NSLog(@"your result array : %@",resultArr);