IOS date returns null - ios

Question

I have date in object "start_time"(2000-12-11T00:00:00+0000), but i need to print date and time separate to textfields. But when i tried with this code i got null value on console
__block NSDictionary *events = [[e.response objectForKey:#"events"] objectAtIndex:0];
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
// NSDate *dates = [events objectForKey:#"start_time"];
// NSDate *localDate = [NSDate date];
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc]init] init];
dateFormatter.dateFormat = #"MMMM dd yyyy";
NSString *dateString = [dateFormatter stringFromDate: [events objectForKey:#"start_time"]];
NSDateFormatter *timeFormatter = [[[NSDateFormatter alloc] init] init];
timeFormatter.dateFormat = #"HH:mm:ss ZZZZ";
NSString *timeString = [timeFormatter stringFromDate: [events objectForKey:#"start_time"]];
NSLog(#"This is time------------------------------: %#",dateString); // null returns
//
This is how i store date into "start_time" by textfields
Blockquote
NSString *datestring = self.date.text;
NSString *timestring = self.time.text;
NSString *combined = [NSString stringWithFormat:#"%# %#", datestring, timestring];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:05.30]];
[dateFormat setDateFormat:#"MM dd yyyy HH:mm a"];
NSDate *date = [dateFormat dateFromString:combined];
NSDictionary *data = #{
#"start_time":[NSString stringWithFormat:#"%#",date]};

Answer 1

I think that became null Because you upcoming date from event that is different format and you are first setting format is different.
dateFormatter.dateFormat = #"MMMM dd yyyy";
that have to:
dateFormatter.dateFormat = #"yyyy-MM-dd'T'HH:mm:ssZ";
You have to set first current date format then you can change it your want date.

Answer 2

Your setting an incorrect format for the date,
Try the below, this will work
//"myDate" variable is an example string, you can change it with "[events objectForKey:#"start_time"]"
NSString *myDate = #"2000-12-11T00:00:00 +0000";
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc]init] init];
dateFormatter.dateFormat = #"yyyy-dd-mm'T'HH:mm:ss Z";
NSDate *myDateObject = [dateFormatter dateFromString:myDate]; //Now you have the date object that return the correct value
//FOR date
[dateFormatter setDateFormat:#"yyyy-dd-mm"];
NSString *OnlyDate = [dateFormatter stringFromDate:myDateObject];
//For Time
[dateFormatter setDateFormat:#"HH:mm:ss Z"];
NSString *OnlyTime = [dateFormatter stringFromDate:myDateObject];
NSLog(#"Date is %# and Time is %#",OnlyDate,OnlyTime);
UPDATE
In your case, if [events objectForKey:#"start_time"] is a NSDATE object then try the following
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc]init] init];
dateFormatter.dateFormat = #"yyyy-dd-mm'T'HH:mm:ss Z";
NSDate *myDateObject = [dateFormatter dateFromString:[events objectForKey:#"start_time"]]; //Now you have the date object that return the correct value
//FOR date
[dateFormatter setDateFormat:#"yyyy-dd-mm"];
NSString *OnlyDate = [dateFormatter stringFromDate:myDateObject];
//For Time
[dateFormatter setDateFormat:#"HH:mm:ss Z"];
NSString *OnlyTime = [dateFormatter stringFromDate:myDateObject];
NSLog(#"Date is %# and Time is %#",OnlyDate,OnlyTime);
Hope this helps.