Question

我正在制作一个我需要创建每周日历的应用。为此，我将需要当周的日期和日期（Sun Sep30，Mon Oct 1，Tue Oct2等）。有人可以指导我如何实现这个目标吗？

问候
的Pankaj

Answer 1

这是一个简单的函数，它提取本周所有日期的日期，从本周日开始到周六，

func formattedDaysInThisWeek() -> [String] {
    // create calendar
    let calendar = NSCalendar(identifier: NSCalendarIdentifierGregorian)!

    // today's date
    let today = NSDate()
    let todayComponent = calendar.components([.Day, .Month, .Year], fromDate: today)

    // range of dates in this week
    let thisWeekDateRange = calendar.rangeOfUnit(.Day, inUnit:.WeekOfMonth, forDate:today)

    // date interval from today to beginning of week
    let dayInterval = thisWeekDateRange.location - todayComponent.day

    // date for beginning day of this week, ie. this week's Sunday's date
    let beginningOfWeek = calendar.dateByAddingUnit(.Day, value: dayInterval, toDate: today, options: .MatchNextTime)

    var formattedDays: [String] = []

    for i in 0 ..< thisWeekDateRange.length {
        let date = calendar.dateByAddingUnit(.Day, value: i, toDate: beginningOfWeek!, options: .MatchNextTime)!
        formattedDays.append(formatDate(date))
    }

    return formattedDays
}

func formatDate(date: NSDate) -> String {
    let format = "EEE MMMdd"
    let formatter = NSDateFormatter()
    formatter.dateFormat = format
    return formatter.stringFromDate(date)
}

如果你调用方法 formattedDaysInThisWeek（），输出就像这样，

["Sun Oct11", "Mon Oct12", "Tue Oct13", "Wed Oct14", "Thu Oct15", "Fri Oct16", "Sat Oct17"]

Answer 2

你这周需要它吗？如果是这样，这里有一些您应该可以使用的代码：

- (NSString *)stringOfDatesOfThisWeek {
    NSArray *datesOfThisWeek = [self dateOfTheWeek:[NSDate date]];

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"EEE MMM d"];

    NSMutableString *dateStringForThisWeek = [[NSMutableString alloc] initWithString:[formatter stringFromDate:[datesOfThisWeek firstObject]]];
    for (int i = 1; i < datesOfThisWeek.count; i++) {
        [dateString appendFormat:@", %@", [formatter stringFromDate:[datesOfThisWeek objectAtIndex:i]]];
    }
}

- (NSArray *)datesOfTheWeek:(NSDate *)todaysDate {
    NSCalendar *calendar = [NSCalendar currentCalendar];
    NSInteger weekNumber =  [[calendar components: NSWeekCalendarUnit fromDate:todaysDate] week];

    NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

    NSDateComponents *comp = [gregorian components:NSYearCalendarUnit fromDate:todaysDate];
    [comp setWeek:weekNumber];  //Week number.

    NSMutableArray *dates = [NSMutableArray new];
    for (int i = 0; i < 7; i++) {
        [comp setWeekday:1]; //First day of the week. Change it to 7 to get the last date of the week
        NSDate *resultDate = [gregorian dateFromComponents:comp];
        [dates addObject:resultDate];
    }

    return dates;
}

在没有Xcode的情况下输入所有内容后，我意识到这个问题是关于Swift的。我要离开它，万一有人想要一个Objective-C答案而且偶然发现了这个问题。

Answer 3

如果我理解正确，要获得预期的日期格式，您可以使用以下格式化程序NSDateFormatter：

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; dateFormatter.dateFormat:@"EEEE, MMM d"; NSLog(@"%@", [dateFormatter stringFromDate:[NSDate date]]);

您还可以设置日期格式化程序的区域设置，以使用指定语言获取工作日：

[dateFormatter setLocale:[NSLocale localeWithLocaleIdentifier:@"en_GB"]];

有关详细信息，请参阅Data Formatting Guide

Answer 4

更新了目标 - c代码@fennelouski：

- (NSString *)stringOfDatesOfThisWeek {
NSArray *datesOfThisWeek = [self datesOfTheWeek:[NSDate date]];

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"EEE MMM d"];

NSMutableString *dateStringForThisWeek = [[NSMutableString alloc] initWithString:[formatter stringFromDate:[datesOfThisWeek firstObject]]];
for (int i = 1; i < datesOfThisWeek.count; i++) {
    [dateStringForThisWeek appendFormat:@", %@", [formatter stringFromDate:[datesOfThisWeek objectAtIndex:i]]];
}
return dateStringForThisWeek;
}

- (NSArray *) datesOfTheWeek:(NSDate *)todaysDate {
    NSCalendar *calendar = [NSCalendar currentCalendar];
    NSInteger weekNumber =  [[calendar components: NSCalendarUnitWeekOfMonth fromDate:todaysDate] weekOfMonth];

    NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];

    NSDateComponents *comp = [gregorian components:NSCalendarUnitYear fromDate:todaysDate];
    [comp setWeekOfMonth:weekNumber];  //Week number.

    NSMutableArray *dates = [NSMutableArray new];
    for (int i = 0; i < 7; i++) {
        [comp setWeekday:1]; //First day of the week. Change it to 7 to get the last date of the week
        NSDate *resultDate = [gregorian dateFromComponents:comp];
        [dates addObject:resultDate];
    }

    return dates;
}

获得一周的工作日和日期

4 个答案: