从iOS sdk中获取日期

Question

在我的应用程序,希望得到日(即Sunday,Monday等)之日起.

我的代码如下:

NSDate *currentDate = [NSDate date];
    NSCalendar *calendar = [NSCalendar currentCalendar];

    //ask for current week
    NSDateComponents *comps = [[NSDateComponents alloc] init];
    comps=[calendar components:NSWeekCalendarUnit|NSYearCalendarUnit fromDate:currentDate];
    //create date on week start
    NSDate* weekstart=[calendar dateFromComponents:comps];

    //add 7 days
    NSMutableArray* week=[NSMutableArray arrayWithCapacity:7];
    for (int i=1; i<=7; i++) {
        NSDateComponents *compsToAdd = [[NSDateComponents alloc] init];
        compsToAdd.day=i;
        NSDate *nextDate = [calendar dateByAddingComponents:compsToAdd toDate:weekstart options:0];
        NSLog(@"%@",nextDate);  // date is 2013-06-30 18:30:00 +0000



        NSDateFormatter *myFormatter = [[NSDateFormatter alloc] init];
        [myFormatter setDateFormat:@"EEEE"]; // day, like "Saturday"
        //[myFormatter setDateFormat:@"c"]; // day number, like 7 for saturday

        NSString *dayOfWeek = [myFormatter stringFromDate:nextDate];

问题

        NSLog(@"Today is: %@", dayOfWeek);  // Prints Mondays instead of Sunday
    }

我怎么解决这个问题？

Answer 1

试试这个 :

    NSCalendar* calender = [NSCalendar currentCalendar];
    NSDateComponents* component = [calender components:NSWeekdayCalendarUnit fromDate:[NSDate date]];
    return [component weekday]; // 1 for Sunday, 2 for Monday, and so on...

从NSDate还可以看到这一天的名字？ 这个https://discussions.apple.com/thread/1700102?start=0&tstart=0

编辑

试试这个

NSString * time = @"2013-06-30T11:00:26+0100";

NSDateFormatter *df = [[[NSDateFormatter alloc] init] autorelease];
[df setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZ"];
NSDate *date1 = [df dateFromString:time];
long lgTime = (long)[date1 timeIntervalSince1970];
NSLog(@"%ld", lgTime);


NSCalendar* calender = [NSCalendar currentCalendar];
NSDateComponents* component = [calender components:NSWeekdayCalendarUnit fromDate:date1];

NSLog(@"date=%@ === %@",[NSDate date],date1);
NSLog(@"day= %d",[component weekday]); ///it return 1

Answer 2

 NSCalendar* calender = [NSCalendar currentCalendar];

 NSDateComponents* component = [calender components:NSWeekdayCalendarUnit fromDate:[NSDate date]];

int weekDay = [component weekday];

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
NSString *weekdayString = [[formatter weekdaySymbols] objectAtIndex:weekDay - 1];

NSLog(@"Day ::: %@", weekdayString);

Answer 3

NSDateFormatter* theDateFormatter = [[NSDateFormatter alloc] init];
[theDateFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];
[theDateFormatter setDateFormat:@"EEEE"];
NSString *weekDay =  [theDateFormatter stringFromDate:[NSDate date]];