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 = 0;
    NSString *result;
    if (timeInterval < 60) {
        result = @"刚刚";
    }
    else if((temp = timeInterval/60) <60){
        result = [NSString stringWithFormat:@"%d分钟前",temp];
    }
    else if((temp = temp/60) <24){
        result = [NSString stringWithFormat:@"%d小时前",temp];
    }
    else if((temp = temp/24) <30){
        result = [NSString stringWithFormat:@"%d天前",temp];
    }
    else if((temp = temp/30) <12){
        result = [NSString stringWithFormat:@"%d月前",temp];
    }
    else{
        temp = temp/12;
        result = [NSString stringWithFormat:@"%d年前",temp];
    }
    return  result;
}