Converting MySQL date field to strings

Question

In my app I am using JSON to retrieve MySQL records.

One of the fields is from date type ( 2014-03-08 ), and I want to show it on a tableView cell but converted to four strings:

1. Day of the week (e.g. Monday).
2. Month (e.g. March).
3. Year (e.g. 2014).
4. Time (e.g. 11:00).

The MySQL fields are:

1. 2014-03-10

2. 2014-03-25

3. 2014-12-01

I am using the following code to do what I need:

  NSString *fecha = [[categorias objectAtIndex:indexPath.row] objectForKey:@"dia"];//fecha is the date from MySQL.


    //convertir fecha


    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yy-mm-dd"];
    NSDate *date = [formatter dateFromString:fecha];



    NSDateFormatter *weekDay = [[NSDateFormatter alloc] init] ;
    [weekDay setDateFormat:@"EEEE"]; //day of the week

    NSDateFormatter *calMonth =[[NSDateFormatter alloc] init] ;
    [calMonth setDateFormat:@"MMMM"];//month in text format(March)

    NSDateFormatter *calYear = [[NSDateFormatter alloc] init];
    [calYear setDateFormat:@"YYYY"];//year

    NSDateFormatter *calDay = [[NSDateFormatter alloc] init];
    [calDay setDateFormat:@"dd"]; //day

    cell.diaLabel.text = [calDay stringFromDate:date] ;//label to show day


    cell.diaSemanaLabel.text = [weekDay stringFromDate:date];//label to show weekDay 

    cell.mesLabel.text = [calMonth stringFromDate:date];//label to show month

    cell.anoLabel.text = [calYear stringFromDate:date];//label to show year

    NSString *hora = [[categorias objectAtIndex:indexPath.row] objectForKey:@"hora"];//hora  is the time field from MySQL

    cell.horaLabel.text = hora; //label to show the time
    //fin convertir fecha

All strings are shown perfectly, except the month string, it always shows 'January'.

Any help is welcome.

Answer 1

Your formatter string for parsing the date should be @"yyyy-MM-dd", not @"yy-mm-dd". The MM is for month. The mm is for minute. If you log the NSDate value (or examine it in the debugger), you can confirm that your current format string is not retrieving the date you think it is.

Answer 2

Try this

NSString *fecha = [[categorias objectAtIndex:indexPath.row] objectForKey:@"dia"];//fecha is the date from MySQL.


    //convertir fecha


    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy-MM-dd"];
    NSDate *date = [formatter dateFromString:fecha];



    NSDateFormatter *weekDay = [[NSDateFormatter alloc] init] ;
    [weekDay setDateFormat:@"EEEE"]; //day of the week

    NSDateFormatter *calMonth =[[NSDateFormatter alloc] init] ;
    [calMonth setDateFormat:@"MMMM"];//month in text format(March)

    NSDateFormatter *calYear = [[NSDateFormatter alloc] init];
    [calYear setDateFormat:@"YYYY"];//year

    NSDateFormatter *calDay = [[NSDateFormatter alloc] init];
    [calDay setDateFormat:@"dd"]; //day

    cell.diaLabel.text = [calDay stringFromDate:date] ;//label to show day


    cell.diaSemanaLabel.text = [weekDay stringFromDate:date];//label to show weekDay 

    cell.mesLabel.text = [calMonth stringFromDate:date];//label to show month

    cell.anoLabel.text = [calYear stringFromDate:date];//label to show year

    NSString *hora = [[categorias objectAtIndex:indexPath.row] objectForKey:@"hora"];//hora  is the time field from MySQL

    cell.horaLabel.text = hora; //label to show the time
    //fin convertir fecha