使用 NSDateFormatter 从 VBO 文件解析 date/timestamp

Question

我正在尝试找出这种时间戳格式，但我觉得它很奇怪。

有该格式的时间戳：184930.60 解释是："This is UTC time since midnight in the form HH:MM:SS.SS."

它看起来像秒数（根据文件的变化，对于 20Hz GPS 模块），但是将这些秒转换为 51h，而这不可能是午夜后的 51h。

知道如何将其转换为 nsdate 吗？

关于文件格式的详细信息：https://racelogic.support/01VBOX_Automotive/01General_Information/Knowledge_Base/VBO_file_format

Answer 1

这是工作示例：

-(NSDate *)getDateFromDecimalTime:(double)decimalTime{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"HHmmss.SS"];
    [formatter setTimeZone:[NSTimeZone timeZoneWithName:@"UTC"]];

    NSDate *date = [formatter dateFromString:[NSString stringWithFormat:@"%f", decimalTime]];


    //gather current calendar
    NSCalendar *calendar = [NSCalendar currentCalendar];

    //gather date components from date
    NSDateComponents *dateComponents = [calendar components:(NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond) fromDate:date];

    // Get current year/day/month
    NSDate *now = [NSDate date];
    // Specify which units we would like to use
    unsigned units = NSCalendarUnitYear | NSCalendarUnitMonth |  NSCalendarUnitDay;
    NSCalendar *calendar2 = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    NSDateComponents *components = [calendar2 components:units fromDate:now];

    //set date components
    [dateComponents setDay:[components day]];
    [dateComponents setMonth:[components month]];
    [dateComponents setYear:[components year]];

    //save date relative from date
    NSDate *completeDate = [calendar dateFromComponents:dateComponents];

    return completeDate;
}

使用 NSDateFormatter 从 VBO 文件解析 date/timestamp

Parsing date/timestamp from VBO file with NSDateFormatter

objective-c

vbo

nsdate

nsdateformatter

vbox