NSString to NSDate return null value - ios

Question

Here i am getting current time and check whether its in am/pm format. If its not like that, i convert 24 hour time format into 12 hour time format and add AM/PM manually.
This is my code:
- (NSString *) getCurrentTime {
NSDate *today = [NSDate date];
NSDateFormatter *timeFormatter = [[NSDateFormatter alloc] init];
[timeFormatter setDateFormat:#"hh:mm:ss a"];
NSString *currentTime = [timeFormatter stringFromDate:today];
currentTime = [self checkTimeFormat:currentTime];
return currentTime;
}
And
- (NSString *) checkTimeFormat:(NSString *) currentTime
{
NSArray *timeArray = [currentTime componentsSeparatedByString:#":"];
int intHour = [[timeArray objectAtIndex:0] intValue];
NSString *lastVal = [timeArray objectAtIndex:2];
if ([lastVal rangeOfString:#"M"].location == NSNotFound) {
if (intHour < 12)
lastVal = [NSString stringWithFormat:#"%# AM", [timeArray objectAtIndex:2]];
else
lastVal = [NSString stringWithFormat:#"%# PM", [timeArray objectAtIndex:2]];
}
if (intHour > 12)
intHour = intHour - 12;
currentTime = [NSString stringWithFormat:#"%d:%#:%#", intHour, [timeArray objectAtIndex:1], lastVal];
NSLog(#"Current Time ==>> %#", currentTime);
return currentTime;
}
Conversion of NSString into NSDate code below:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"hh:mm:ss a"];
NSDate *testDate = [dateFormatter dateFromString:getCurrentTime];
NSLog(#"testDate => %#", testDate);
If the Time is in 12 hour format (am/pm), testDate value is getting correctly.
If the Time is in 24 hour format, testDate value is null
What is the issue?
Thanks in Advance.

Answer 1

You can try:
NSDate *today = [NSDate date];
NSDateFormatter *timeFormatter = [[NSDateFormatter alloc] init];
[timeFormatter setDateFormat:#"HH:mm:ss"];
NSString *currentTime24 = [timeFormatter stringFromDate:today];
[timeFormatter setDateFormat:#"hh:mm:ss a];
NSDate *currentTime12 = [timeFormatter dateWithString:currentTime24];
NSString *currentTime = [timeFormatter stringWithDate:currentTime12];