How to sort date @"dd/MM/yyyy hh:mm a" with respect to date and time in decreasing order

Question

how to sort this Array contains date and time, i need to sort for same dates ,if i have same dates multiple entries i need to sort it in decreasing order based on the time and it will be shown in dressing order all the entries.

    data= {
     {
            dateAndTime = "04/03/2017 09:52 PM";
            deviceImage = "";
            dialOrReceive = 0;
            number = "+918839752179";
            profilePhoto = "";
        },
            {
            dateAndTime = "02/03/2017 06:54 PM";
            deviceImage = "";
            deviceImage = "";
            dialOrReceive = 0;
            number = "+918839752179";
            profilePhoto = "";
        },
            {
            dateAndTime = "04/03/2017 05:36 PM";
            deviceImage = "";
            dialOrReceive = 0;
            number = "+918839752179";
            profilePhoto = "";
        },
            {
            dateAndTime = "03/03/2017 04:48 PM";
            deviceImage = "";
            dialOrReceive = 0;
            number = "+918839752179";
            profilePhoto = "";
        }, {
            dateAndTime = "03/03/2017 06:48 PM";
            deviceImage = "";
            dialOrReceive = 0;
            number = "+918839752179";
            profilePhoto = "";
        },{
            dateAndTime = "02/03/2017 09:36 PM";
            deviceImage = "";
            dialOrReceive = 0;
            number = "+918839752179";
            profilePhoto = "";
        },
}

Answer 1

Try this

- (void)sortDict {

    NSDictionary *dict = @{
                           @"data" : @[@{
                                           @"dateAndTime" : @"04/03/2017 09:52 PM",
                                           @"deviceImage" : @"",
                                           @"dialOrReceive" : @0,
                                           @"number" : @"+918839752179",
                                           @"profilePhoto" : @""
                                           },
                                       @{
                                           @"dateAndTime" : @"02/03/2017 06:54 PM",
                                           @"deviceImage" : @"",
                                           @"dialOrReceive" : @0,
                                           @"number" : @"+918839752179",
                                           @"profilePhoto" : @""
                                           },
                                       @{
                                           @"dateAndTime" : @"04/03/2017 05:36 PM",
                                           @"deviceImage" : @"",
                                           @"dialOrReceive" : @0,
                                           @"number" : @"+918839752179",
                                           @"profilePhoto" : @""
                                           },
                                       @{
                                           @"dateAndTime" : @"03/03/2017 04:48 PM",
                                           @"deviceImage" : @"",
                                           @"dialOrReceive" : @0,
                                           @"number" : @"+918839752179",
                                           @"profilePhoto" : @""
                                           },
                                       @{
                                           @"dateAndTime" : @"03/03/2017 06:48 PM",
                                           @"deviceImage" : @"",
                                           @"dialOrReceive" : @0,
                                           @"number" : @"+918839752179",
                                           @"profilePhoto" : @""
                                           },
                                       @{
                                           @"dateAndTime" : @"02/03/2017 09:36 PM",
                                           @"deviceImage" : @"",
                                           @"dialOrReceive" : @0,
                                           @"number" : @"+918839752179",
                                           @"profilePhoto" : @""
                                           },
                                       @{
                                           @"dateAndTime" : @"02/03/2017 07:36 AM",
                                           @"deviceImage" : @"",
                                           @"dialOrReceive" : @0,
                                           @"number" : @"+918839752179",
                                           @"profilePhoto" : @""
                                           }
                                       ]
                            };

    NSDateFormatter *formatter = [NSDateFormatter new];
    formatter.dateFormat = @"dd/MM/yyyy hh:mm a";

    NSArray *arr = [dict objectForKey:@"data"];

    arr = [arr sortedArrayUsingComparator:^NSComparisonResult(id  _Nonnull obj1, id  _Nonnull obj2) {

        NSDate *date1 = [formatter dateFromString:[obj1 objectForKey:@"dateAndTime"]];
        NSDate *date2 = [formatter dateFromString:[obj2 objectForKey:@"dateAndTime"]];

        return [date2 compare:date1];
    }];

    NSLog(@"%@", arr);
}