I am new to xcode and object oriented development (was databasic back in the day...) and am trying to build a string based on whether or not the start date is the same as the end date, so if it is the same just return the start date and if not return the start and end date (i.e. 15/02/2013 - 17/02/2013). My code is as follows but it does not like the 'fulldatestring', is there something wrong with my if statement?
NSString *startDate = [info objectForKey:#"StartDate"];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-mm-dd"];
NSDate *sdate = [dateFormatter dateFromString:startDate];
dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"dd/mm/yyyy"];
NSString *convertedStartDate = [dateFormatter stringFromDate:sdate];
NSString *endDate = [info objectForKey:#"EndDate"];
[dateFormatter setDateFormat:#"yyyy-mm-dd"];
NSDate *edate = [dateFormatter dateFromString:endDate];
dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"dd/mm/yyyy"];
NSString *convertedEndDate = [dateFormatter stringFromDate:edate];
if(convertedStartDate isEqualToString:convertedEndDate) {
NSString *fulldatestring = convertedStartDate;
}
else
NSString *fulldatestring = [convertedStartDate, convertedEndDate ];
{
cell.datesLabel.text = fulldatestring
To compare NSDates, see the NSDate instance methods isEqualToDate: and compare:. You don't need to (and shouldn't) convert them to NSStrings to compare them.
Search the NSString class reference for "append" and you'll see two methods that append one NSString to another.
That should put you in the right direction, but I can post code if you really need it.
There are a couple issues with your Objective-C syntax.
Whenever sending a message to an object such a isEqualToString: to a string it must be in square brackets. as well your braces around the if statement don't match.
if([convertedStartDate isEqualToString:convertedEndDate]) {
NSString *fulldatestring = convertedStartDate;
} else {
NSString *fulldatestring = [NSString stringWithFormat:#"%# - %#", convertedStartDate, convertedEndDate];
}
As well NSString objects are not mutable so you cannot just concat them like you are trying to do you must create a new NSString object.
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.
Hey I'm having problems formatting my date ....
my code it this :
NSString *dateString = news.date;
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.DateFormat =#"yyyy-MM-dd'T'HH:mm:ss";
NSDate *dateFromString = [[NSDate alloc] init];
dateFromString = [dateFormatter dateFromString: dateString];
NSLog(#" %#", dateFromString);
if i look at my dateString it´s 2012-03-06T12:15:45
but when i format it, it comes out 2012-03-06 11:15:45 +0000
how do i remove the +0000 ???
dateFromString is an NSDate instance. So 2012-03-06 11:15:45 +0000 is the correct result you get when you call NSLog(#" %#", dateFromString);. That's simply how the method description of NSDate works.
If you want to change a string of type 2012-03-06T12:15:45 to a string of type 2012-03-06 11:15:45, then you have to create another string fromdateFromString` like the following:
// ...
dateFromString = [dateFormatter dateFromString:dateString];
dateFormatter.dateFormat = #"yyyy-MM-dd HH:mm:ss";
NSString *newDateString = [dateFormatter stringFromDate:dateFromString];
NSLog(#"%#", newDateString);
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];
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.