I'm working with local notification. But while I set time for notification, its also consider second.
This is the code where I set time.
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"HH:mm"];
[tfTime setText:[NSString stringWithFormat:#"%#",[df stringFromDate:datePicker.date]]];
selectedDateTime = [datePicker date];
I want notification on rounded time, without second.
UILocalNotification *notification = [[UILocalNotification alloc] init];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc]init];
//[dateFormat setDateFormat:#"dd-MM-yyyy"];
//NSDate *notificationDate = [dateFormat dateFromString:strRemindMeBefore];
notification.fireDate = selectedDateTime;
notification.alertBody = tvMessage.text;
notification.timeZone = [NSTimeZone defaultTimeZone];
notification.soundName = UILocalNotificationDefaultSoundName;
notification.applicationIconBadgeNumber = 1;
[[UIApplication sharedApplication] scheduleLocalNotification:notification];
A convenient method to "round" a date to minutes or other units is the rangeOfUnit:…
method of NSCalendar.
NSDate *selectedDateTime = [datePicker date];
NSDate *roundedDate;
NSCalendar *cal = [NSCalendar currentCalendar];
[cal rangeOfUnit:NSCalendarUnitMinute startDate:&roundedDate interval:NULL forDate:selectedDateTime];
// …
notification.fireDate = roundedDate;
What you can do is use the NSDateComponents as follows and set the seconds to 00, which might help... the following is a sample code where you can set all the components manually!
Hope this helps
NSDateComponents *comps = [[[NSDateComponents alloc] init] autorelease];
[comps setDay:1];
[comps setMonth:1];
[comps setYear:2013];
[comps setHour:10];
[comps setMinute:10];
/// You can set this component as 00
[comps setSecond:00];
localNotif.fireDate = [[NSCalendar currentCalendar] dateFromComponents:comps];
Related
I basically want to convert a particular date (x) to the previous day date(x - 1 day) and also to the next day date (x + 1 day). I am using the following code for this :
NSDate *datePlusOneDay = [currentDate dateByAddingTimeInterval:(60 * 60 * 24)];
However I have my date (x) in NSString format, and I need to convert the NSString(myDateString) to NSDate(myDate) before applying the above code.
I have a NSString containing date in format MM-dd-yyyy.
For converting I am using the following code , but I am getting absurd values.
NSLog(#"myDateString=%#",myDateString);//output:myDateString=10-25-2012//all correct
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"MM-dd-yyyy"];
NSDate *myDate=[formatter dateFromString:myDateString];
NSLog(#"myDate=%#",myDate);//output:myDate=2012-10-24 18:30:00 +0000 // I only want the date to be shown // and why has the format changed
NSDate *datePlusOneDay = [currentDate dateByAddingTimeInterval:(60 * 60 * 24)];
NSLog(#"datePlusOneDay=%#",datePlusOneDay);//output:datePlusOneDay=2012-10-25 18:30:00 +0000// I only want the date to come , not time // and why has the format changed
Later again I need to convert the NSDate to NSString
NSString *curentString=[formatter stringFromDate:datePlusOneDay];
NSLog(#"curentString=%#",curentString); //output:curentString=10-26-2012
Similarly I also want to get the previous date.
Please help guys !! and ho ho MERRY CHRISTMAS !!
Do as: componets.day = 1 to obtain the next, -1 for the previous day.
NSDate *date = [NSDate date]; // your date from the server will go here.
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [[NSDateComponents alloc] init];
components.day = 1;
NSDate *newDate = [calendar dateByAddingComponents:components toDate:date options:0];
NSLog(#"newDate -> %#",newDate);
The below code should get you the previous date:
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *offsetComponents = [[NSDateComponents alloc] init];
[offsetComponents setDay:-1]; // replace "-1" with "1" to get the datePlusOneDay
NSDate *dateMinusOneDay = [gregorian dateByAddingComponents:offsetComponents toDate:myDate options:0];
Merry Xmas :)
NSCalendar *cal = [NSCalendar currentCalendar];
NSDateComponents *components = [cal components:( NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit ) fromDate:[[NSDate alloc] init]];
[components setHour:-[components hour]];
[components setMinute:-[components minute]];
[components setSecond:-[components second]];
NSDate *today = [cal dateByAddingComponents:components toDate:[[NSDate alloc] init] options:0]; //This variable should now be pointing at a date object that is the start of today (midnight);
[components setHour:-24];
[components setMinute:0];
[components setSecond:0];
NSDate *yesterday = [cal dateByAddingComponents:components toDate: today options:0];
Try this simple solution for previous date:-
NSDate *datePlusOneDay = [[NSDate date] dateByAddingTimeInterval:-(60 * 60 * 24)];
NSLog(#"datePlusOneDay=%#",datePlusOneDay);
Swift 5 Solution
let calendar = Calendar.current
calendar.date(byAdding: .day, value: -2, to: Date())
function for previousDay
-(void)previousDay
{
NSDate *today = [NSDate date];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"dd/MM/yyyy"];
dateString = [dateFormat stringFromDate:today];
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *comps = [NSDateComponents new];
comps.day =-1;
NSDate *sevenDays = [calendar dateByAddingComponents:comps toDate:[NSDate date] options:0];
[dateFormat setDateFormat:#"dd/MM/yyyy"];
EndingDate = [dateFormat stringFromDate:sevenDays];
}
function for next day
-(void)nextDay
{
NSDate *today = [NSDate date];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"dd/MM/yyyy"];
dateString = [dateFormat stringFromDate:today];
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *comps = [NSDateComponents new];
comps.day =1;
NSDate *sevenDays = [calendar dateByAddingComponents:comps toDate:[NSDate date] options:0];
[dateFormat setDateFormat:#"dd/MM/yyyy"];
EndingDate = [dateFormat stringFromDate:sevenDays];
}
I want to fire a notification before 2 days from targeted date.Currently I am using below code to fire notification but there how to fire notification exactly before 2 days from targeted date.
NSString *frstdate = [[calenderarray objectAtIndex:k] objectForKey:#"date"];
NSLog(#"frstdate..%#",frstdate);
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd"];
NSDate *date = [dateFormat dateFromString:frstdate];
NSLog(#"date..%#",date);
NSDate *dateToFire = [[[NSDate alloc] initWithTimeInterval:-24*60*60 sinceDate:date]autorelease];
NSLog(#"dateToFire..%#",dateToFire);
UILocalNotification *localNotif = [[UILocalNotification alloc] init];
if (localNotif == nil)
return;
localNotif.fireDate = itemDate;
localNotif.alertAction = #"View";
localNotif.soundName = UILocalNotificationDefaultSoundName;
localNotif.applicationIconBadgeNumber = 1;
localNotif.userInfo = [NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:#"Get Food"], #"foodItem", nil] ;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotif];
[localNotif release];
Thanks in advance.
You should use NSCalendar and NSDateComponents to do the maths - something like:
NSCalendar* calendar = [NSCalendar currentCalendar];
NSDateComponents* twoDaysAgo = [[NSDateComponents alloc] init];
twoDaysAgo.day = -2;
NSDate* dateToFire = [calendar dateByAddingComponents:twoDaysAgo toDate:date options:0];
You can do arithmetic with calendar dates (year/month/day/hour... representation in a given timezone) via the NSCalendar class. Although in most cases, "24*60*60" seconds will be one day -- users probably won't notice the difference.
I am try to remove time from date how to do this i try this code it not working proper where i am wrong
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDate *todaysDate = [NSDate date];
//NSDateComponents *dateComponents = [[NSDateComponents alloc] init];
NSDateComponents*dateComponents = [gregorian components:NSDayCalendarUnit fromDate:todaysDate];
[dateComponents setDay:1];
app.selectionData.fromDateSelected = [gregorian dateByAddingComponents:dateComponents toDate:todaysDate options:0];
//[dateComponents release];
[gregorian release];
Are you trying to do this?
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
int comps = NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit;
NSDateComponents *dateComponents = [gregorian components:comps fromDate:[NSDate date]];
[dateComponents setDay:[dateComponents day] + 1];
app.selectionData.fromDateSelected = [gregorian dateFromComponents:dateComponents];
[gregorian release];
To only get the date, you can use NSDateFormatter
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterMediumStyle];
[dateFormatter setTimeStyle:NSDateFormatterNoStyle];
NSString* currentDate = [dateFormatter stringFromDate:[NSDate date]];
[dateFormatter release];
You can also supply your own format for the date.
For ex:
[dateFormattter setDateFormat:#"yyyy-mm-dd"];
You can refer to UTS #35 and Date Formatting Guide for more options on formatting.
Try this out. This works for me
NSDate *todaysDate = [NSDate date];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd"];
NSString *stringDate = [dateFormat stringFromDate:todaysDate];
NSLog(#"stringDate: %#",stringDate);
[dateFormat release];
EDIT:
NSDate *today = [NSDate date];
NSTimeInterval secondsPerDay = 24 * 60 * 60;
NSDate *date = [today addTimeInterval:secondsPerDay];
//Change NSDate *date = [tomorrow addTimeInterval:-secondsPerDay]; for yesterday
NSDate *tomorrow = date;
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd"];
NSString *stringDate = [dateFormat stringFromDate:tomorrow];
NSLog(#"stringDate: %#",stringDate);
[dateFormat release];
Hope this helps you.
i have a "DateTimeArray" this array contain
DateTimeArray[index 0] = 20.05.2011 12:12:50
DateTimeArray[index 1]= 20.05.2011 12:13:20
DateTimeArray[index 2]= 20.05.2011 12:20:10
all the value are in string,and i want to convert this string into NSDate and only want to access time not date
and then this time values will be stored in array and this newly array will be used for drawing line chart
i hope some one know this issue
thank you very much
Code as follows,
for(int index=0;index<[DateTimeArray count];index++)
{
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"HH:mm:ss"];
NSString *timeString=[[[DateTimeArray objectAtIndex:index]componentsSeparatedByString:#" "]objectAtIndex:1];
NSDate *time=[df dateFromString:timeString];
[timeArray addObject:time];
[df release];
}
Try this
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"HH:mm:ss"];
NSDate *formattedDate = [df dateFromString:[DateTimeArray objectAtIndex:requiredIndex]];
[df release];
Best and cleaner approach:
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"dd.MM.yyyy HH:mm:ss"];
for(int i=0; i < [DateTimeArray count]; ++i)
{
NSString *string = [DateTimeArray objectAtIndex:i];
NSDate *date = [df dateFromString:string];
[timeArray addObject:time];
}
[df release]; // ALWAYS release unused objects
Then to just access hours, and not days, you should select the required components of each NSDate* instance:
// Get the Gregorian calendar
NSCalendar *cal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
// Get the date
NSDate* date = [timeArray objectAtIndex:my_index];
// Get the hours, minutes, seconds
NSDateComponents* hour = [cal components:NSHourCalendarUnit fromDate:date];
NSDateComponents* minute = [cal components:NSMinuteCalendarUnit fromDate:date];
NSDateComponents* second = [cal components:NSSecondCalendarUnit fromDate:date];
NSMutableArray *nsdateArray = [NSMutableArray arrayWithCapacity:[DateTimeArray count]];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"dd.MM.yyyy HH:mm:ss"];
for(NSString *currentString in DateTimeArray){
NSDate *date = [dateFormat dateFromString:currentString];
[nsdateArray addObject:date];
}
[dateFormat release];
NSLog(#"ArrayWithDate:%#",[nsdateArray description]);
Heres the complete set of code.. Hope it helps..
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"HH:mm:ss"];
int i=0;//start for{} loop
NSString *currDate = [formatter dateFromString:[DateTimeArray objectAtIndex:i]];
[formatter release];
Happy iCoding...
NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];
[timeFormat setDateFormat:#"HH:mm:ss"]
NSString *theTime = [timeFormat dateFromString:date];
or
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *components = [calendar components:(kCFCalendarUnitHour | kCFCalendarUnitMinute) fromDate:date];
NSInteger hour = [components hour];
NSInteger minute = [components minute];
I'm using the code provided below to display time and date. can anyone help me with atuomatically changing the time by seconds and the date by the day?
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];
You can use NSTimer, specifically scheduledTimerWithTimeInterval:target:selector:userInfo:repeats:. You can use 1 as a time interval.
Use the NSDateComponents class. For example, to add one day and one second to a date:
NSDate *startDate = [NSDate date];
unsigned unitFlags = NSDayCalendarUnit | NSSecondCalendarUnit;
NSCalendar *curr = [NSCalendar currentCalendar];
NSDateComponents *oneDay = [[NSDateComponents alloc] init];
oneDay.day = 1;
oneDay.second = 1;
NSDate* adjustedDate = [curr dateByAddingComponents:oneDay
toDate:startDate
options:0];
Date and Time programming guide