常用的时间转换

#pragma mark - 将某个时间戳转化成 时间

+(NSString *)timestampSwitchTime:(NSString *)timestamp andFormatter:(NSString *)format{

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

    [formatter setDateStyle:NSDateFormatterMediumStyle];

    [formatter setTimeStyle:NSDateFormatterShortStyle];

    [formatter setDateFormat:format]; // （@"YYYY-MM-dd hh:mm:ss"）----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制

       NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];

    [formatter setTimeZone:timeZone];

    NSDate *confromTimesp;

    if (timestamp.length== 13) {

       confromTimesp = [NSDate dateWithTimeIntervalSince1970:[timestamp integerValue]/1000];

    }else{

        confromTimesp = [NSDate dateWithTimeIntervalSince1970:[timestamp integerValue]];

    }

    NSString *confromTimespStr = [formatter stringFromDate:confromTimesp];

   return confromTimespStr;

}

#pragma mark - 将某个时间转化成 时间戳

+(NSInteger)timeSwitchTimestamp:(NSString *)formatTime andFormatter:(NSString *)format{

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

    [formatter setDateStyle:NSDateFormatterMediumStyle];

    [formatter setTimeStyle:NSDateFormatterShortStyle];

    [formatter setDateFormat:format]; //(@"YYYY-MM-dd hh:mm:ss") ----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制

    NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];

    [formatter setTimeZone:timeZone];

    NSDate* date = [formatter dateFromString:formatTime]; //------------将字符串按formatter转成nsdate

    //时间转时间戳的方法:

    NSInteger timeSp = [[NSNumber numberWithDouble:[date timeIntervalSince1970]] integerValue];

    NSLog(@"将某个时间转化成 时间戳&&&&&&&timeSp:%ld",(long)timeSp); //时间戳的值

    return timeSp;

}

#pragma mark - 获取当前时间的 时间戳

+(NSInteger)getNowTimestamp{

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

    [formatter setDateStyle:NSDateFormatterMediumStyle];

    [formatter setTimeStyle:NSDateFormatterShortStyle];

    [formatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"]; // ----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制

    //设置时区,这个对于时间的处理有时很重要

    NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];

    [formatter setTimeZone:timeZone];

    NSDate *datenow = [NSDate date];//现在时间

    //时间转时间戳的方法:

    NSInteger timeSp = [[NSNumber numberWithDouble:[datenow timeIntervalSince1970]] integerValue];

    return timeSp;

}

常用的时间转换

原文：https://www.cnblogs.com/yangqinoak/p/10383207.html