[英]How to get days in a week from today in objective c
我想参考一周的日期。 例如:10月14日是星期三。 我正在创建一个收集视图单元格,并按如下所示显示日期。
在第14个单元格中,它将显示星期三,但如何将第二天显示为星期四,然后显示星期五……等等。
我有今天的日期,如下所示。
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);
而且我在网上找到了此方法,当您传递整数时,该方法返回字符串中的天数,但是我也遇到了麻烦,无法每次都知道要传递哪个整数,所以我得到了不同的字符串。
static inline NSString *stringFromWeekday(int weekday){
static NSString *strings[] = {
@"Sunday",
@"Monday",
@"Tuesday",
@"Wednesday",
@"Thursday",
@"Friday",
@"Saturday",
};
return strings[weekday];
}
您已经准备就绪。 你应该在得到正确的日名称convertedDateString
字符串。 您只需将24小时添加到todayDate
对象中,然后再次使用dateformatter
获取第二天。
NSDate *todayDate = [NSDate date]; // get today date
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"EEEE"];
NSString *convertedDateString = [dateFormatter stringFromDate:todayDate];// here convert date in
你可以这样得到第二天。
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
使用下面的代码,您将从今天开始在一周之内得到几天。
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];
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