- (NSString *)minutesAgo {
NSDateFormatter *fmt = [[NSDateFormatter alloc] init];
fmt.dateFormat = @"yyyy-MM-dd HH:mm:ss";
NSDate *createdDate = [fmt dateFromString:self];
// 判断发送时间 和 现在时间 的差距
if (createdDate.isToday) { // 今天
if (createdDate.deltaWithNow.hour >= 1) {
fmt.dateFormat = @"HH:mm";
return [fmt stringFromDate:createdDate];
} else if (createdDate.deltaWithNow.minute >= 1) {
return [NSString stringWithFormat:@"%ld分钟前", (long)createdDate.deltaWithNow.minute];
} else {
return @"刚刚";
}
} else if (createdDate.isYesterday) { // 昨天
fmt.dateFormat = @"昨天 HH:mm";
return [fmt stringFromDate:createdDate];
} else if (createdDate.isThisYear) { // 今年(至少是前天)
fmt.dateFormat = @"MM-dd HH:mm";
return [fmt stringFromDate:createdDate];
} else {// 非今年
fmt.dateFormat = @"yyyy-MM-dd HH:mm";
return [fmt stringFromDate:createdDate];
}
}
#pragma mark Comparing Dates
- (BOOL) isEqualToDateIgnoringTime: (NSDate *) aDate
{
NSDateComponents *components1 = [CURRENT_CALENDAR components:DATE_COMPONENTS fromDate:self];
NSDateComponents *components2 = [CURRENT_CALENDAR components:DATE_COMPONENTS fromDate:aDate];
return ((components1.year == components2.year) &&
(components1.month == components2.month) &&
(components1.day == components2.day));
}
- (BOOL) isToday
{
return [self isEqualToDateIgnoringTime:[NSDate date]];
}
- (BOOL) isYesterday
{
return [self isEqualToDateIgnoringTime:[NSDate dateYesterday]];
}
/**
* 获得与当前时间的差距
*/
- (NSDateComponents *)deltaWithNow {
NSCalendar *calendar = [NSCalendar currentCalendar];
int unit = NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
return [calendar components:unit fromDate:self toDate:[NSDate date] options:0];
}
/**
* 是否为今年
*/
- (BOOL)isThisYear {
NSCalendar *calendar = [NSCalendar currentCalendar];
int unit = NSCalendarUnitYear;
// 获得当前时间的年月日
NSDateComponents *nowCmps = [calendar components:unit fromDate:[NSDate date]];
// 获得self的年月日
NSDateComponents *selfCmps = [calendar components:unit fromDate:self];
return nowCmps.year == selfCmps.year;
}
