I need to get the weekday of the first day of the month. For example, for the current month September 2013 the first day falls on Sunday.
At first, get the first day of current month (for example):
NSDate *today = [NSDate date];
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [gregorian components:(NSEraCalendarUnit | NSYearCalendarUnit | NSMonthCalendarUnit) fromDate:today];
components.day = 1;
NSDate *firstDayOfMonth = [gregorian dateFromComponents:components];
Then use NSDateFormatter to print it as a weekday:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"EEEE"];
NSLog(#"%#", [dateFormatter stringFromDate:firstDayOfMonth]);
P.S. also take a look at Date Format Patterns
Here is the solution to getting the weekday name of the first day in the current month
NSDateComponents *weekdayComps = [[NSDateComponents alloc] init];
weekdayComps = [calendar.currentCalendar components:calendar.unitFlags fromDate:calendar.today];
weekdayComps.day = 1;
NSDateFormatter *weekDayFormatter = [[NSDateFormatter alloc]init];
[weekDayFormatter setDateFormat:#"EEEE"];
NSString *firstweekday = [weekDayFormatter stringFromDate:[calendar.currentCalendar dateFromComponents:weekdayComps]];
NSLog(#"FIRST WEEKDAY: %#", firstweekday);
For the weekday index, use this
NSDate *weekDate = [calendar.currentCalendar dateFromComponents:weekdayComps];
NSDateComponents *components = [calendar.currentCalendar components: NSWeekdayCalendarUnit fromDate: weekDate];
NSUInteger weekdayIndex = [components weekday];
NSLog(#"WEEKDAY INDEX %i", weekdayIndex);
You can also increment or decrement the month if needed.
Depending on the output you need you may use NSDateFormatter (as it was already said) or you may use NSDateComponents class. NSDateFormatter will give you a string representation, NSDateComponents will give you integer values. Method weekday may do what you want.
NSDateComponents *components = ...;
NSInteger val = [components weekday];
For Swift 4.2
First:
extension Calendar {
func startOfMonth(_ date: Date) -> Date {
return self.date(from: self.dateComponents([.year, .month], from: date))!
}
}
Second:
self.firstWeekDay = calendar.component(.weekday, from: calendar.startOfMonth(Date()))
Related
How can I get month calendar start and end date?
From the screenshot, I need to get 1 aug 2017 and 31 aug 2017 in fscalender?
when i scroll then this method call but everytime get current date
- (void)calendarCurrentPageDidChange:(FSCalendar *)calendar;
{
}
thanks!
You can use these two NSDate category methods for your need:
- (NSDate *)startDateOfMonth {
NSCalendar *current = [NSCalendar currentCalendar];
NSDate *startOfDay = [current startOfDayForDate:self];
NSDateComponents *components = [current components:(NSCalendarUnitMonth | NSCalendarUnitYear) fromDate:startOfDay];
NSDate *startOfMonth = [current dateFromComponents:components];
return startOfMonth;
}
- (NSDate *)endDateOfMonth {
NSCalendar *current = [NSCalendar currentCalendar];
NSDateComponents *components = [[NSDateComponents alloc] init];
components.month = 1;
components.day = -1;
NSDate *endOfMonth = [current dateByAddingComponents:components toDate:[self startDateOfMonth] options:NSCalendarSearchBackwards];
return endOfMonth;
}
You need to convert the date from your FSCalendar to NSDate:
- (void)calendarCurrentPageDidChange:(FSCalendar *)calendar {
NSDate *date = ... //Conversion goes here
NSDate *startDateOfMonth = [date startDateOfMonth];
NSDate *endDateOfMonth = [date endDateOfMonth];
// convert back if you need to
}
The FSCalendar property currentPage returns the start date of currently showing page - this is the first day of the month or week depending on whether you are showing a month or week.
Then use NSCalendar methods to find the last day of the month or week that starts with currentPage. There are a number of ways to do this; e.g. add an NSDateComponents value or use one of the "next" methods such as nextDateAfterDate:matchingUnit:value:options:.
HTH
Get First date
- (void)calendarCurrentPageDidChange:(FSCalendar *)calendar;
{
NSLog(#"did change to page %#",[self.dateFormatter stringFromDate:calendar.currentPage]);
}
-(void)calendarCurrentPageDidChange:(FSCalendar *)calendar{
[self.calendar selectDate:[self.calendar.currentPage fs_firstDayOfMonth]];
[self.calendar selectDate:[self.calendar.currentPage fs_lastDayOfMonth]];
}
You get First and Last date of Current Month by yourself. No need to get it from FSCalendar. For this see below code.
NDDate *currentDate = //Pass date which you get
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSDateComponents *comp = [gregorian components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay ) fromDate:currentDate];
[comp setMonth:[comp month]];
[comp setDay:1];
NSDate *firstDayDate = [gregorian dateFromComponents:comp];
[comp setMonth:[comp month]+1];
[comp setDay:0];
NSDate *lastDayDate = [gregorian dateFromComponents:comp];
NSLog(#"First : %#, Last : %#",firstDayDate,lastDayDate);
This way you are getting First and Last Date.
I am trying to get the days of a week in reference to their date.
Ex.: 14th October is a Wednesday.
I am creating a collection view cell and displaying the date as follows.
In the 14th cell it would display Wednesday, but how to get the next day as Thursday, then Friday...and so on.
I have got todays date and which day it is as follows,
day = [components day];
week = [components month];
year = [components year];
weekday = [components weekday];
NSString *string = [NSString stringWithFormat:#"%ld.%ld.%ld", (long)day, (long)week, (long)year];
NSLog(#"%#",string);
NSDate *todayDate = [NSDate date]; // get today date
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"EEEE"];
NSString *convertedDateString = [dateFormatter stringFromDate:todayDate];// here convert date in
NSLog(#"Today formatted date is %#",convertedDateString);
And i have found this method online, which returns the days in string when you pass the integer, but i am having trouble in this too, not understanding which integer to pass every time so I get different strings.
static inline NSString *stringFromWeekday(int weekday){
static NSString *strings[] = {
#"Sunday",
#"Monday",
#"Tuesday",
#"Wednesday",
#"Thursday",
#"Friday",
#"Saturday",
};
return strings[weekday];
}
You already got everything in place. You should be getting the correct day name in the convertedDateString string. You just have to add 24 hours to your todayDate object and use the dateformatter again to get the next day.
NSDate *todayDate = [NSDate date]; // get today date
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"EEEE"];
NSString *convertedDateString = [dateFormatter stringFromDate:todayDate];// here convert date in
You can get the next day like this.
NSDateComponents *dateComponents = [[NSCalendar currentCalendar] components:(NSDayCalendarUnit | NSMonthCalenderUnit | NSYearCalenderUnit | NSWeekdayCalendarUnit) fromDate:today];
[dateComponents setDay:dateComponents.day+1];
NSDate *nextDay = [dateComponents date];
// Get the day by following same approach in the top
You will get days in a week from today using below code.
NSDate *today = [NSDate date];
NSCalendar *gregorian = [[NSCalendar alloc]
initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *weekdayComponents =
[gregorian components:(NSDayCalendarUnit | NSWeekdayCalendarUnit) fromDate:today];
NSInteger day = [weekdayComponents day];
NSInteger weekday = [weekdayComponents weekday];
I'm using NSDateFormatter to format NSDate variables like this:
NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = #"dd/MM";
I want to provide an unique format only for the first day of year(setDateFormat:#"dd/MM/yyyy").
Is it possible?
Thanks in advance.
You can use something like this to format your date,
NSDate *dateInAction = [NSDate date]; //Your date here
NSDateComponents *components = [[NSCalendar currentCalendar] components:NSCalendarUnitDay | NSCalendarUnitMonth fromDate:dateInAction];
NSInteger day = [components day];
NSInteger month = [components month];
if (day==1 && month==1) {
// Set formatter for first day of year
}else{
// all other days
}
How can I have the title of UITableview with date?
I know I can edit the title using:
self.title=#"meals for ..";
I want to add the date for one week. How can I do that?
You can get a date like this:
NSDate *theDateToday = [NSDate date];
And format it like this:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"EEE MMM dd"];
NSString *theDateAsAString = [dateFormatter stringFromDate:theDateToday];
Combine that with what you have like this:
self.title = [NSString stringWithFormat:#"meals for %#", theDateAsAString];
As for finding the days of the week, you could try adapting this answer.
- (NSString *)getWeekStartDateAsString:(NSDate *)date {
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [gregorian components:NSWeekdayCalendarUnit | NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:today];
int dayofweek = [[[NSCalendar currentCalendar] components:NSWeekdayCalendarUnit fromDate:today] weekday];// this will give you current day of week
[components setDay:([components day] - ((dayofweek) - 2))];// for beginning of the week.
NSDate *beginningOfWeek = [gregorian dateFromComponents:components];
NSDateFormatter *dateFormat_first = [[NSDateFormatter alloc] init];
[dateFormat_first setDateFormat:#"yyyy-MM-dd"];
dateString2Prev = [dateFormat stringFromDate:beginningOfWeek];
weekstartPrev = [[dateFormat_first dateFromString:dateString2Prev] retain];
return weekstartPrev;
}
- (NSString *)getWeekEndDateAsString:(NSDate *)date {
NSCalendar *gregorianEnd = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *componentsEnd = [gregorianEnd components:NSWeekdayCalendarUnit | NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:today];
int Enddayofweek = [[[NSCalendar currentCalendar] components:NSWeekdayCalendarUnit fromDate:today] weekday];// this will give you current day of week
[componentsEnd setDay:([componentsEnd day]+(7-Enddayofweek)+1)];// for end day of the week
NSDate *EndOfWeek = [gregorianEnd dateFromComponents:componentsEnd];
NSDateFormatter *dateFormat_End = [[NSDateFormatter alloc] init];
[dateFormat_End setDateFormat:#"yyyy-MM-dd"];
dateEndPrev = [dateFormat stringFromDate:EndOfWeek];
weekEndPrev = [[dateFormat_End dateFromString:dateEndPrev] retain];
return weekEndPrev;
}
You end result might look like this:
self.title = [NSString stringWithFormat:#"meals for %#-%#", [self getWeekStartDateAsString:theDateToday], [self getWeekEndDateAsString:theDateToday]];
A rarely known NSCalendar method will be the best option IMO
rangeOfUnit:startDate:interval:forDate:. It gives you the start and the duration (interval) for a certain time unit. With it it is easy to find the start of the week in the used calendar and add the range-1 to get the latest second in that week.
With the also rarely seen localizedStringFromDate:dateStyle:timeStyle: Available in OS X v10.6, iOS 4.0 it is easy to create a localized representation of the dates.
NSCalendar *cal = [NSCalendar currentCalendar];
NSDate *now = [NSDate date];
NSDate *startOfTheWeek;
NSDate *endOfWeek;
NSTimeInterval interval;
[cal rangeOfUnit:NSWeekCalendarUnit
startDate:&startOfTheWeek
interval:&interval
forDate:now];
//startOfWeek is 2013-06-02 22:00:00 +0000 now (note: it is GMT with timezone support for my timezone Europe/Berlin/DST)
endOfWeek = [startOfTheWeek dateByAddingTimeInterval:interval-1];
// 2013-06-09 21:59:59 +0000
NSString *text = [NSDateFormatter localizedStringFromDate:startOfTheWeek
dateStyle:NSDateFormatterShortStyle
timeStyle:NSDateFormatterNoStyle];
text = [text stringByAppendingString:#" to "];
text = [text stringByAppendingFormat:#"%#", [NSDateFormatter localizedStringFromDate:endOfWeek
dateStyle:NSDateFormatterShortStyle
timeStyle:NSDateFormatterNoStyle]];
self.title=text;
results in 03.06.13 to 09.06.13 for my german locale, where Monday is start of the week.
Scenario:
I have an expense tracking iOS Application and I am storing expenses from a expense detail view controller into a table view (with fetched results controller) that shows the list of expenses along with the category and amount and date. I do have a date attribute in my entity "Money" which is a parent entity for either an expense or an income.
Question:
What I want is to basically categorize my expenses for a given week, a month, or year and display it as the section header title for example : (Oct 1- Oct 7, 2012) and it shows expenses amount and related stuff according to that particular week. Two buttons are provided in that view, if I would press the right button, it will increment the week by a week (Oct 1- Oct 7, 2012 now shows Oct8 - Oct 15, 2012) and similarly the left button would decrement the week by a week.
How would I accomplish that? I am trying the following code - doesn't work.
- (void)weekCalculation
{
NSDate *today = [NSDate date]; // present date (current date)
NSCalendar* calendar = [NSCalendar currentCalendar];
NSDateComponents* comps = [calendar components:NSYearForWeekOfYearCalendarUnit |NSYearCalendarUnit|NSMonthCalendarUnit|NSWeekCalendarUnit|NSWeekdayCalendarUnit fromDate:today];
[comps setWeekday:1]; // 1: Sunday
firstDateOfTheWeek = [[calendar dateFromComponents:comps] retain];
[comps setWeekday:7]; // 7: Saturday
lastDateOfTheWeek = [[calendar dateFromComponents:comps] retain];
NSLog(#" first date of week =%#", firstDateOfTheWeek);
NSLog(#" last date of week =%#", lastDateOfTheWeek);
firstDateOfWeek = [dateFormatter stringFromDate:firstDateOfTheWeek];
lastDateOfWeek = [dateFormatter stringFromDate:lastDateOfTheWeek];
}
Code for incrementing date -
- (IBAction)showNextDates:(id)sender
{
int addDaysCount = 7;
NSDateComponents *dateComponents = [[[NSDateComponents alloc] init] autorelease];
[dateComponents setDay:addDaysCount];
NSDate *newDate1 = [[NSCalendar currentCalendar]
dateByAddingComponents:dateComponents
toDate:firstDateOfTheWeek options:0];
NSDate *newDate2 = [[NSCalendar currentCalendar]
dateByAddingComponents:dateComponents
toDate:lastDateOfTheWeek options:0];
NSLog(#" new dates =%# %#", newDate1, newDate2);
}
Suppose the week shows like this (Nov4, 2012 - Nov10, 2012) and I press the increment button, I see in the console, date changes to Nov11,2012 and Nov.17, 2012 which is right but if I press the increment button again, it shows the same date again (Nov 11, 2012 and Nov.17, 2012).
Please help me out here.
Declare currentDate as an #property in your class. And try this.
#property(nonatomic, retain) NSDate *currentDate;
Initially set
self.currentDate = [NSDate date];
before calling this method.
- (void)weekCalculation
{
NSCalendar* calendar = [NSCalendar currentCalendar];
NSDateComponents* comps = [calendar components:NSYearForWeekOfYearCalendarUnit |NSYearCalendarUnit|NSMonthCalendarUnit|NSWeekCalendarUnit|NSWeekdayCalendarUnit fromDate:self.currentDate];
[comps setWeekday:1]; // 1: Sunday
firstDateOfTheWeek = [[calendar dateFromComponents:comps] retain];
[comps setWeekday:7]; // 7: Saturday
lastDateOfTheWeek = [[calendar dateFromComponents:comps] retain];
NSLog(#" first date of week =%#", firstDateOfTheWeek);
NSLog(#" last date of week =%#", lastDateOfTheWeek);
firstDateOfWeek = [dateFormatter stringFromDate:firstDateOfTheWeek];
lastDateOfWeek = [dateFormatter stringFromDate:lastDateOfTheWeek];
}
Once the view is loaded self.currentDate value should be updated from showNextDates. Make sure it is not getting reset anywhere else.
- (IBAction)showNextDates:(id)sender
{
int addDaysCount = 7;
NSDateComponents *dateComponents = [[[NSDateComponents alloc] init] autorelease];
[dateComponents setDay:addDaysCount];
NSDate *newDate1 = [[NSCalendar currentCalendar]
dateByAddingComponents:dateComponents
toDate:firstDateOfTheWeek options:0];
NSDate *newDate2 = [[NSCalendar currentCalendar]
dateByAddingComponents:dateComponents
toDate:lastDateOfTheWeek options:0];
NSLog(#" new dates =%# %#", newDate1, newDate2);
self.currentDate = newDate1;
}
I had needed similar thing in one of my old projects and achieved it via the code below. It sets this weeks date to an NSDate variable and adds/removes 7 days from day component in each button click. Here is the code:
NSCalendar *calendar = [NSCalendar currentCalendar];
[calendar setTimeZone:[NSTimeZone timeZoneWithAbbreviation:#"GMT"]];
NSDate *date = [NSDate date];
NSDateComponents *components = [calendar components:(NSYearCalendarUnit|NSWeekdayCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit) fromDate:date ];
//
[components setDay:([components day] - ([components weekday] )+2)];
self.currentDate = [calendar dateFromComponents:components];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.dateFormat = #"dd.MM.yyyy HH:mm:ss";
self.datelabel.text = [formatter stringFromDate:self.currentDate];
The code above calculates this week start and sets it to currentDate variable. I Have two UIButtons with UIActions named prevClick and nextClick which calls the method that sets the next or previous weekstart:
- (IBAction)prevClick:(id)sender {
[self addRemoveWeek:NO];
}
-(void)addRemoveWeek:(BOOL)add{
NSCalendar *calendar = [NSCalendar currentCalendar];
[calendar setTimeZone:[NSTimeZone timeZoneWithAbbreviation:#"GMT"]];
NSDateComponents *components = [calendar components:(NSYearCalendarUnit|NSWeekdayCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit) fromDate:self.currentDate ];
components.day = add?components.day+7:components.day-7;
self.currentDate = [calendar dateFromComponents:components];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.dateFormat = #"dd.MM.yyyy HH:mm:ss";
self.datelabel.text = [formatter stringFromDate:self.currentDate];
}
- (IBAction)nextClk:(id)sender {
[self addRemoveWeek: YES];
}