Cocoa Date Picker formatting - cocoa

This prints the selected datePicker's date to a textField like this:
February 9, 2012 ...
NSDate *theDate = [calendar dateValue];
if (theDate)
{
NSDateFormatter *formatter = [[[NSDateFormatter alloc] init] autorelease];
NSString *formattedDateString;
[formatter setDateStyle:NSDateFormatterLongStyle];
[formatter setTimeStyle:NSDateFormatterNoStyle];
formattedDateString = [formatter stringFromDate:theDate];
[dateString setStringValue: formattedDateString];
}
}
How do I format the printed string to look like this?
2012-02-09
I tried adding a dateFormatter to the textField and customizing how it should display a date. Doesn't work.
Thanks for the help.


You can do it like this:
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy-MM-dd"];
NSDate *theDate = [calendar dateValue];
NSString *formatedDateString = [formatter stringFromDate:theDate];
[formatter release];

Related

Convert a string to NSDate

I have a string date with this format:
NSString *dateStr = #"2014-04-11T16:46:58Z"
I need to transform this to NSDate.
I have tried this:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-ddTHH:mm:ssZ"];
also changed the second line to
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
but when I do
NSDate *date = [dateFormatter dateFromString:dateStr];
I obtain nil. Any clues?

Try this:
[dateFormatter setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss'Z'"];
It worked for me ;)

Disable a particular date in UIDatePicker

I was trying to set up a uidatepicker for booking some events in the calendar.
I need to disable (hide) some particular dates in my UIDatePicker, for instance days when I'm out of town or on vacation.
Can you help me with this one?
Thanx a lot in advance.
Here is some code:
- (void)viewDidLoad
{
NSLocale *locale = [[NSLocale alloc] initWithLocaleIdentifier:#"IT"];
[self.datePicker setLocale:locale];
NSString *min = #"20132015";
NSString *max = #"22132015";
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"ddMMyyyy HH:mm"];
NSDate *datemin = [dateFormat dateFromString:min];
NSDate *datemax = [dateFormat dateFromString:max];
[self.view addSubview:datePicker];
datePicker.minuteInterval = 15;
datePicker.maximumDate = datemax;
datePicker.minimumDate = [NSDate date];
[datePicker addTarget:self action:#selector(disableDate) forControlEvents:UIControlEventValueChanged];
[datePicker addTarget:self
action:#selector(LabelChange:)
forControlEvents:UIControlEventValueChanged];
[super viewDidLoad];
// Do any additional setup after loading the view.
}
-(void)disableDate{
NSDate *pickedDate = datePicker.date; // Get current Date
NSDate *disabledDate = [?????;
if([pickedDate compare:disabledDate] == NSOrderedSame)
{
[datePicker setDate:disabledDate animated:YES];
}
}
-(void)getDisableDate
{
?????
}
- (void)LabelChange:(id)sender{
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"dd.MM.yyyy HH:mm"];
NSLocale *locale = [[NSLocale alloc] initWithLocaleIdentifier:#"IT"];
[self.datePicker setLocale:locale];
labelDate.text = [NSString stringWithFormat:#"%#",
[df stringFromDate:datePicker.date]];
NSLog(#"date:%#", datePicker.date);
}

UIDatePicker doesn't support ranges of dates. What I would do instead is to change the date whenever a bad date is selected, by using setDate:animated: to the nearest date that is selectable. Also, to show a message somewhere explaining why the selected date was changed.
Either that, or, write your own custom UIDatePicker using UIPickerView. Not too hard, I've done it before. The worst part is dealing with wrapping values (eg: 31 -> 1). Does involve more work, though.

Best solution is create custom UIDatePicker using UIPickerView it's too easy and in future you can do changes easily.
Check the link.

Date Time Display Issue

I have the following code:
NSString *dateString = #"01-02-2010 12:00:00 AM";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"dd-MM-yyyy h:m:s a"];
NSDate *dateFromString = [[NSDate alloc] init];
dateFromString = [dateFormatter dateFromString:dateString];
[dateFormatter release];
When I set the above date in a DateTimePopup it shows "02/01/2010".
But when I use the same to add data to a GridView it shows
Full Date with Time and Zone.
I need to display only Date ie "02/01/2010"
kindly help

You need to set the date format for display:
NSString *dateString = #"01-02-2010 12:00:00 AM";
NSDateFormatter *inputDateFormatter = [NSDateFormatter new];
[inputDateFormatter setDateFormat:#"dd-MM-yyyy h:m:s a"];
NSDate *dateFromString = [inputDateFormatter dateFromString:dateString];
NSDateFormatter *displayDateFormatter = [NSDateFormatter new];
[displayDateFormatter setDateFormat:#"MM/dd/yyyy"];
NSString *displayDateString = [displayDateFormatter stringFromDate:dateFromString];
NSLog(#"displayDateString: %#", displayDateString);
NSLog output
displayDateString: 02/01/2010
Note: In the OP code the line
NSDate *dateFromString = [[NSDate alloc] init];
is unnecessary, on the very next line dateFromString is over written.

Xcode show current time using image

I make a simple clock in xcode.
For now i use a font to display hour and minutes, they are in two separate label.
How can i do for display image for time, if i don't want use a font but one image for every number?
For time i use this:
[oreLabel setFont:[UIFont fontWithName:#"Digital-7Mono" size:250]];
NSDate *today = [[NSDate alloc] init];
dateFormatter = [[NSDateFormatter alloc] init];
[self.dateFormatter setDateFormat:#"11"];
NSString *currentTime = [self.dateFormatter stringFromDate: today];
self.oreLabel.text = currentTime;
pollingTimer = [NSTimer scheduledTimerWithTimeInterval:kPollingInterval
target:self
selector:#selector(pollTime)
userInfo:nil
repeats:YES];
[today release];
Thanks for help

I think the NSDateComponents object might be helpful to you. Maybe something like this:
NSDate *today = [NSDate date];
NSCalendar *calendar = [[NSCalendar alloc]
initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [calendar components:(NSHourCalendarUnit
| NSMinuteCalendarUnit)
fromDate:today];
NSInteger hour = [components hour];
UIImage *hourImage = [UIImage imageNamed:
[NSString stringWithFormat:#"hour%d", hour]];

Formatting NSDate into particular styles for both year, month, day, and hour, minute, seconds

I basically need to get current date and time separately, formatted as:
2009-04-26
11:06:54
The code below, from another question on the same topic, generates
now: |2009-06-01 23:18:23 +0100|
dateString: |Jun 01, 2009 23:18|
parsed: |2009-06-01 23:18:00 +0100|
This is almost what I'm looking for, but I want to separate the day and time.
NSDateFormatter *format = [[NSDateFormatter alloc] init];
[format setDateFormat:#"MMM dd, yyyy HH:mm"];
NSDate *now = [[NSDate alloc] init];
NSString *dateString = [format stringFromDate:now];
NSDateFormatter *inFormat = [[NSDateFormatter alloc] init];
[inFormat setDateFormat:#"MMM dd, yyyy"];
NSDate *parsed = [inFormat dateFromString:dateString];
NSLog(#"\n"
"now: |%#| \n"
"dateString: |%#| \n"
"parsed: |%#|", now, dateString, parsed);

this is what i used:
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd"];
NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];
[timeFormat setDateFormat:#"HH:mm:ss"];
NSDate *now = [[NSDate alloc] init];
NSString *theDate = [dateFormat stringFromDate:now];
NSString *theTime = [timeFormat stringFromDate:now];
NSLog(#"\n"
"theDate: |%#| \n"
"theTime: |%#| \n"
, theDate, theTime);
[dateFormat release];
[timeFormat release];
[now release];

iPhone format strings are in Unicode format. Behind the link is a table explaining what all the letters above mean so you can build your own.
And of course don't forget to release your date formatters when you're done with them. The above code leaks format, now, and inFormat.

NSDateFormatter *dateformat = [[NSDateFormatter alloc] init];
[dateformat setDateFormat:#"Your Date Format"];
set the format to return is....
yyyy-MM-dd return 2015-12-17 date
yyyy-MMM-dd return 2015-Dec-17 date
yy-MM-dd return 15-12-17 date
dd-MM-yy return 17-12-15 date
dd-MM-yyyy return 17-12-2015 date
yyyy-MMM-dd HH:mm:ss return 2015-Dec-17 08:07:13 date and time
yyyy-MMM-dd HH:mm return 2015-Dec-17 08:07 date and time
For more Details Data and Time Format for Click Now.
Thank you.....

you can use this method just pass your date to it
-(NSString *)getDateFromString:(NSString *)string
{
NSString * dateString = [NSString stringWithFormat: #"%#",string];
NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"your current date format"];
NSDate* myDate = [dateFormatter dateFromString:dateString];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"your desired format"];
NSString *stringFromDate = [formatter stringFromDate:myDate];
NSLog(#"%#", stringFromDate);
return stringFromDate;
}

nothing new but still want to share my method:
+(NSString*) getDateStringFromSrcFormat:(NSString *) srcFormat destFormat:(NSString *)
destFormat scrString:(NSString *) srcString
{
NSString *dateString = srcString;
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
//[dateFormatter setDateFormat:#"MM-dd-yyyy"];
[dateFormatter setDateFormat:srcFormat];
NSDate *date = [dateFormatter dateFromString:dateString];
// Convert date object into desired format
//[dateFormatter setDateFormat:#"yyyy-MM-dd"];
[dateFormatter setDateFormat:destFormat];
NSString *newDateString = [dateFormatter stringFromDate:date];
return newDateString;
}

For swift
var dateString:String = "2014-05-20";
var dateFmt = NSDateFormatter()
// the format you want
dateFmt.dateFormat = "yyyy-MM-dd"
var date1:NSDate = dateFmt.dateFromString(dateString)!;

Swift 3
extension Date {
func toString(template: String) -> String {
let formatter = DateFormatter()
formatter.dateFormat = DateFormatter.dateFormat(fromTemplate: template, options: 0, locale: NSLocale.current)
return formatter.string(from: self)
}
}
Usage
let now = Date()
let nowStr0 = now.toString(template: "EEEEdMMM") // Tuesday, May 9
let nowStr1 = now.toString(template: "yyyy-MM-dd") // 2017-05-09
let nowStr2 = now.toString(template: "HH:mm:ss") // 17:47:09
Play with template to match your needs. Examples and doc here to help you build the template you need.
Note
You may want to cache your DateFormatter if you plan to use it in TableView for instance.
To give an idea, looping over 1000 dates took me 0.5 sec using the above toString(template: String) function, compared to 0.05 sec using myFormatter.string(from: Date).

NSDate *date = [NSDate date];
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"yyyy-MM-dd"]
NSString *dateString = [df stringFromDate:date];
[df setDateFormat:#"hh:mm:ss"];
NSString *hoursString = [df stringFromDate:date];
Thats it, you got it all you want.

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