IOS 数字日期转化为字符串

+ (NSString *)dateIntToDateStr:(NSInteger)dateInt
{
    int year = dateInt / 10000;
    int month = dateInt % 10000 / 100;
    int day = dateInt % 100;
    NSString *date = [NSString stringWithFormat:@"%d-%d-%d", year, month, day];
    NSLog(@"date is %@",date);
    return date;
}

输入：20130129
输出：2013-1-29