- (NSString*)WeekdayStringFromDateString:(NSString *)dateString {
NSDateFormatter *dateFormatter = [[NSDateFormatteralloc] init];
[dateFormatter setDateFormat: @"yyyy-MM-dd"];
NSDate *Date= [dateFormatter dateFromString:dateString];
NSArray *weekdays = [NSArrayarrayWithObjects: [NSNullnull], @"星期日", @"星期一", @"星期二", @"星期三", @"星期四", @"星期五", @"星期六", nil];
NSCalendar *calendar = [[NSCalendaralloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSTimeZone *timeZone = [[NSTimeZonealloc] initWithName:@"Asia/Shanghai"];
[calendar setTimeZone: timeZone];
NSCalendarUnit calendarUnit = NSWeekdayCalendarUnit;
NSDateComponents *theComponents = [calendar components:calendarUnit fromDate:Date];
return [weekdays objectAtIndex:theComponents.weekday];
}
二.
- (NSString*)getWeekDayWithYear:(NSString*)year month:(NSString*)month day:(NSString*)day
{
NSInteger yearInt = [year integerValue];
NSInteger monthInt = [month integerValue];
NSInteger dayInt = [day integerValue];
int c = 20;//世纪
int y = (int)yearInt -1;//年
int d = (int)dayInt;
int m = (int)monthInt;
int w =(y+(y/4)+(c/4)-2*c+(26*(m+1)/10)+d-1)%7;
NSString *weekDay = @"";
switch (w) {
case0: weekDay = @"星期日"; break;
case1: weekDay = @"星期一"; break;
case2: weekDay = @"星期二"; break;
case3: weekDay = @"星期三"; break;
case4: weekDay = @"星期四"; break;
case5: weekDay = @"星期五"; break;
case6: weekDay = @"星期六"; break;
default:break;
}
return weekDay;
}
根据日期字符串转化为星期几的函数
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