firstWeekday 值为1，可以自己设置
weekDay 为 1 时对应的是周日
- (NSString *)getWeekTime
{
NSDate *nowDate = [NSDate date];
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *comp = [calendar components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitWeekday fromDate:nowDate];
// 获取今天是周几
NSInteger weekDay = [comp weekday];
// 获取几天是几号
NSInteger day = [comp day];
NSLog(@"%ld----%ld",(long)weekDay,(long)day);
// 计算当前日期和本周的星期一和星期天相差天数
long firstDiff,lastDiff;
// weekDay = 1; weekDay == 1 == 周日
if (weekDay == 1)
{
firstDiff = -6;
lastDiff = 0;
}
else
{
firstDiff = [calendar firstWeekday] - weekDay + 1;
lastDiff = 8 - weekDay;
}
NSLog(@"firstDiff: %ld lastDiff: %ld",firstDiff,lastDiff);
// 在当前日期(去掉时分秒)基础上加上差的天数
NSDateComponents *baseDayComp = [calendar components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay fromDate:nowDate];
//获取周一日期
[baseDayComp setDay:day + firstDiff];
NSDate *firstDayOfWeek = [calendar dateFromComponents:baseDayComp];
//获取周末日期
[baseDayComp setDay:day + lastDiff];
NSDate *lastDayOfWeek = [calendar dateFromComponents:baseDayComp];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"YYYY年MM月dd日"];
NSString *firstDay = [formatter stringFromDate:firstDayOfWeek];
NSString *lastDay = [formatter stringFromDate:lastDayOfWeek];
NSLog(@"%@=======%@",firstDay,lastDay);
NSString *dateStr = [NSString stringWithFormat:@"%@-%@",firstDay,lastDay];
return dateStr;
}
