iOS 刚刚，几分钟前，几小时前，几天前，几月前，几年前

- (NSString *)compareCurrentTime:(NSDate*) compareDate
{
    NSTimeInterval  timeInterval = [compareDate timeIntervalSinceNow];
    timeInterval = -timeInterval;
    int temp = ;
    NSString *result;
    if (timeInterval < ) {
        result = @"刚刚";
    }
    else if((temp = timeInterval/) <){
        result = [NSString stringWithFormat:@"%d分钟前",temp];
    }
    else if((temp = temp/) <){
        result = [NSString stringWithFormat:@"%d小时前",temp];
    }
    else if((temp = temp/) <){
        result = [NSString stringWithFormat:@"%d天前",temp];
    }
    else if((temp = temp/) <){
        result = [NSString stringWithFormat:@"%d月前",temp];
    }
    else{
        temp = temp/;
        result = [NSString stringWithFormat:@"%d年前",temp];
    }
    return  result;
}

另类写法

//-------------------------------------------------------------------------------------------------------------------------------------------------
NSString* TimeElapsed(NSTimeInterval seconds)
//-------------------------------------------------------------------------------------------------------------------------------------------------
{
    NSString *elapsed;
    if (seconds < )
    {
        elapsed = @"Just now";
    }
    else if (seconds <  * )
    {
        int minutes = (int) (seconds / );
        elapsed = [NSString stringWithFormat:@"%d %@", minutes, (minutes > ) ? @"mins" : @"min"];
    }
    else if (seconds <  *  * )
    {
        int hours = (int) (seconds / ( * ));
        elapsed = [NSString stringWithFormat:@"%d %@", hours, (hours > ) ? @"hours" : @"hour"];
    }
    else
    {
        int days = (int) (seconds / ( *  * ));
        elapsed = [NSString stringWithFormat:@"%d %@", days, (days > ) ? @"days" : @"day"];
    }
    return elapsed;
}