Obj-c - 按日期/时间对数组中的字典进行排序？

Question

我正在尝试按照预定日期中的日期/时间将人（字典）放入我的数组中。这是我正在使用的代码，但它似乎不起作用。人们只是按照相同的顺序返回（而不是按日期/时间重新排序）。

我当前的代码：

ViewController.m

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"MMM dd, yyyy hh:mm"];

    self.sortedByTime = [self.dailySchedule sortedArrayUsingComparator:^NSComparisonResult(NSDictionary *obj1, NSDictionary *obj2)
    {
        NSDate *date1 = [dateFormatter dateFromString:obj1[@"scheduleddate"]];
        NSDate *date2 = [dateFormatter dateFromString:obj2[@"scheduleddate"]];
        return [date1 compare:date2];
    }];
    NSLog(@"Sorted Array : %@", self.sortedByTime);
    }

包含在我的数组中，我有：

{
        "first name" = Michael;
        "last name" = Levy;
        scheduleddate = "Feb 14, 2021 05:00 PM";
      
    },
        {

        "first name" = Cali;
        "last name" = Wright;
        scheduleddate = "Feb 14, 2021 10:00 AM";
  
    },
        {
         "first name" = Janine;
        "last name" = Lohr;
         scheduleddate = "Feb 14, 2021 01:00 PM";
   
    }

我想要达到的目标：

 {
            "first name" = Cali;
            "last name" = Wright;
            scheduleddate = "Feb 14, 2021 10:00 AM";
      
        },
 {
             "first name" = Janine;
            "last name" = Lohr;
             scheduleddate = "Feb 14, 2021 01:00 PM";
       
        },

 {
            "first name" = Michael;
            "last name" = Levy;
            scheduleddate = "Feb 14, 2021 05:00 PM";
          
        }