Changing The Date Values of NSUserDefaults standardUserDefaults from a Dictionary Response - objective-c

Question

My method receives a Dictionary named responseDict which contains keys, such as id, status, name, phoneNumber, date etc. in
responseDict[#"data"][#"value"][n]
(n for number)
If our code uses NSUserDefaults to access data:
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
How can I change the date MySQL attribute 2017-05-12 10:00:00 to Dec 5, 2017 10 AM?
I tried the following, but it does not seem to change the defaults in the UILabel.
[defaults setInteger:[dictionary[#"id"] integerValue] forKey:#"ID"];
[defaults setObject:dictionary[#"status"] forKey:kNSUDoctorStatus];
[defaults setInteger:[dictionary[#"dur"] integerValue] forKey:#"duration"];
[defaults setObject:[NSString stringWithFormat:#"%# some",dictionary[#"date"]] forKey:#"date"];
[defaults synchronize];
Edit:
UILabel
The UILabel seems to have been added to the view by:
UILabel *vb = (UILabel *)[self.view viewWithTag:personMessageViewTag];
which was defined by:
#define personMessageViewTag 3001
Doctor Class
There is also a PersonDetailView class initialized:
PersonDetailView *personOnTheView;
And called in a method:
personOnTheView = [PersonDetailView sharedInstance];
personOnTheView.delegate = self;
[personOnTheView updateValues];
[self.view addSubview:personOnTheView];
Method:
Here is the code for [personOnTheView updateValues]
-(void)updateValues{
NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
NSString *strImageUrl = [NSString stringWithFormat:#"%#%#",baseUrlForXXHDPIImage,[ud objectForKey:kOnGoingBookingPersonProfileImageKey]];
_doctorName.text = [ud objectForKey:kOnGoingBookingPersonNameKey];
NSString *at = [NSString stringWithFormat:#"%#",flStrForObj([Helper getLocalDate:[ud objectForKey:kOnGoingBookingPersonBookingDate]])];
_appoinmentTime.text = at;
float rating = [[ud objectForKey:kOnGoingBookingPersonRatingKey] floatValue];
_starRatingView.value = rating;
[_profilepic sd_setImageWithURL:[NSURL URLWithString:[Helper removeWhiteSpaceFromURL:strImageUrl]]
placeholderImage:[UIImage imageNamed:#"doctor_image_thumbnail"]
completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL){
}];
}
Problem:
Everytime I change or modify:
[defaults setObject:dictionary[kPNPayloadAppoinmentTimeKey] forKey:kOnGoingBookingPersonBookingDate];
To:
[defaults setObject:[NSString stringWithFormat:#"%# some",dictionary[#"date"]] forKey:#"date"];
or just as simple as:
[defaults setObject:#"Something here" forKey:#"date"];
It displays blank.
Additional Information Edit:
[Helper getLocalDate] code:
+(NSString *)getLocalDate:(NSString *)gmtdate {
NSString *dateStr = gmtdate;
NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc] init];
[dateFormatter1 setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
NSDate *destinationDate = [dateFormatter1 dateFromString:dateStr];
NSDateFormatter *dateFormatters = [[NSDateFormatter alloc] init];
[dateFormatters setDateFormat:#"MMM d, yyyy HH a"];
dateStr = [dateFormatters stringFromDate: destinationDate];
// NSLog(#"DateString : %#", dateStr);
return dateStr;
}

Answer 1

With the help of this method you can get the date in local format if you having time zone in date string
-(NSDate*)convertDateToLocal:(NSString *)strDate
{
NSDateFormatter *localFormat = [[NSDateFormatter alloc] init];
[localFormat setDateFormat:#"yyyy-MM-dd HH:mm:ss z"];
NSDate *localDate = [localFormat dateFromString:strDate];
return localDate;
}
Here are two public method for date conversion if you don't have time zone
1) Date from string,
+ (NSDate *)dateFromString:(NSString *)strSource inFormat:(NSString *)strTargetFormat
{
NSDateFormatter *dtfFormatter = [[NSDateFormatter alloc] init];
[dtfFormatter setDateFormat:strTargetFormat];
return [dtfFormatter dateFromString:strSource];
}
2) String from date,
+ (NSString *)stringFromDate:(NSDate *)dtSourceDate inFormat:(NSString *)strTargetFormat
{
NSDateFormatter *dtfFormatter = [[NSDateFormatter alloc] init];
[dtfFormatter setDateFormat:strTargetFormat];
if (dtSourceDate != nil)
return [dtfFormatter stringFromDate:dtSourceDate];
else
return #"";
}
Hope this helps.