NSDatePicker returns default date even when date is set programatically

Question

I have a datePicker instance which is linked to the IBOutlet.

@interface SomeClass() {

    __weak IBOutlet UIDatePicker *datePicker;
}

Now in my awakeFromNib method I am setting the minimumDate, maximumDate and date property

- (void)awakeFromNib {

    [datePicker setMinimumDate:[[NSDate date] dateByAddingTimeInterval:60*10]];
    [datePicker setMaximumDate:[[NSDate date] dateByAddingTimeInterval:60*60*24*10]];
    [datePicker setDate:datePicker.minimumDate];

    NSLog(@"%@", datePicker.date);
    //Logs Correct Value
}

When I log datePicker.date after setting it in awakeFromNib method, it gives correct value. Till now so good.

Now when I try to get the date value after the view is initialized, for ex, on a button click event, it gives me the default value which is current date value.

- (IBAction)aButtonTouchUpInsideEvent:(UIButton *)button {
    NSLog(@"%@", datePicker.date);
    //Logs [NSDate date] value
}

I want to know why it is not giving me the value which I set in awakeFromNib method. I tried searching for this issue but no luck.

@SarrY and whats the delegate? As per the Apple documentation and UIKit Framework, there is no delegate for UIDatePicker. — Burhanuddin Sunelwala, Mar 18 '15 at 12:23
@Sanandrea because it is an UIView and not an UIViewController — Burhanuddin Sunelwala, Mar 18 '15 at 12:23
Is this view utilised in one of your ViewControllers? Why don't you try to set the datePicker property in viewDidLoad of a ViewController? — Sanandrea, Mar 18 '15 at 12:37
What happens if you add `[datePicker addTarget:self action:@selector(datePickerDidChangeDate:) forControlEvents:UIControlEventValueChanged];` and trace value changes? — Azat, Mar 18 '15 at 12:40
Yes I tried this, but it doesn't get called when you set it programatically. — Burhanuddin Sunelwala, Mar 18 '15 at 12:46
@BurhanuddinSunelwala so maybe you getting some another, possible new instance somewhere? Could you log how many times you create that view? — Azat, Mar 18 '15 at 13:26
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/73251/discussion-between-azat-and-burhanuddin-sunelwala). — Azat, Mar 18 '15 at 13:37

score 2 · Accepted Answer · answered Mar 18 '15 at 14:14

2

You value is overridden at some time by system. You can move your code to -willMoveToSuperview:

answered Mar 18 '15 at 14:14

Azat

6,745
5
31
48

score 0 · Answer 2 · answered Mar 18 '15 at 12:23

0

Try this

    NSString *dateStr = @"Tue, 25 May 2010 12:53:58 +0000";
    // Convert string to date object
    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
    [dateFormat setDateFormat:@"EE, d LLLL yyyy HH:mm:ss Z"];
    NSDate *date = [dateFormat dateFromString:dateStr];
    [myPicker setDate:date];

then try to get the date time from picker may be there is some issue with setting time

answered Mar 18 '15 at 12:23

Daniyal Ahmed

3
1

As I have mentioned in the question, it gives correct time while setting it in awakeFromNib method. – Burhanuddin Sunelwala Mar 18 '15 at 12:25

NSDatePicker returns default date even when date is set programatically

2 Answers2