Date Picker & To find Today, YesterDay, Days ago, weeks ago,months ago,years ago from given Date...

Date Picker & To find Today, YesterDay, Days ago, weeks ago,months ago,years ago from given Date...

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

- (NSString *)relativeDateStringForDate:(NSDate *)date;

@end

#import "ViewController.h"

@interface ViewController ()

{

    

    __weak IBOutlet UILabel *lblValue;

    __weak IBOutlet UIDatePicker *datePicker;

}

@end

@implementation ViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

    

    

//    NSString *dateString = @"2016-04-27T18:30:00Z";

//    

//    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

//    [formatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZ"];

//    NSDate *theDate = [formatter dateFromString:dateString];

//    NSLog(@"The Date: %@", theDate);

    

}

- (IBAction)btnClicked:(id)sender

{

  lblValue.text = [self relativeDateStringForDate:datePicker.date];

}

- (NSString *)relativeDateStringForDate:(NSDate *)date

{

    

    NSCalendarUnit units = NSCalendarUnitDay | NSCalendarUnitWeekOfYear |

    NSCalendarUnitMonth | NSCalendarUnitYear;

    NSCalendar *cal = [NSCalendar currentCalendar];

    NSDateComponents *components1 = [cal components:(NSCalendarUnitEra|NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay) fromDate:[NSDate date]];

    NSDate *today = [cal dateFromComponents:components1];

    

    components1 = [cal components:(NSCalendarUnitEra|NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay) fromDate:date];

    NSDate *thatdate = [cal dateFromComponents:components1];

    

    // if `date` is before "now" (i.e. in the past) then the components will be positive

    NSDateComponents *components = [[NSCalendar currentCalendar] components:units

                                                                   fromDate:thatdate

                                                                     toDate:today

                                                                    options:0];

    

    if (components.year > 0)

    {

        return [NSString stringWithFormat:@"%ld years ago", (long)components.year];

    }

    else if (components.month > 0)

    {

        return [NSString stringWithFormat:@"%ld months ago", (long)components.month];

    }

    else if (components.weekOfYear > 0)

    {

        return [NSString stringWithFormat:@"%ld weeks ago", (long)components.weekOfYear];

    }

    else if (components.day > 0)

    {

        if (components.day > 1)

        {

            return  [NSString stringWithFormat:@"%ld days ago", (long)components.day];

        }

        else

        {

            return @"Yesterday";

        }

    }

    else

    {

        return @"Today";

    }

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

}

@end