How to parse an ISO-8601 duration in Objective C?

Question

I\'m looking for an easy way to parse a string that contains an ISO-8601 duration in Objective C. The result should be something usable like a NSTimeI

Answer 1

Quick and dirty implementation

    - (NSInteger)integerFromYoutubeDurationString:(NSString*)duration{

    if(duration == nil){
        return 0;
    }

    NSString *startConst = @"PT";
    NSString *hoursConst = @"H";
    NSString *minutesConst = @"M";
    NSString *secondsConst = @"S";
    NSString *hours = nil;
    NSString *minutes = nil;
    NSString *seconds = nil;
    NSInteger totalSeconds = 0;

    NSString *clean = [duration componentsSeparatedByString:startConst][1];

    if([clean containsString:hoursConst]){
        hours = [clean componentsSeparatedByString:hoursConst][0];
        clean = [clean componentsSeparatedByString:hoursConst][1];
        totalSeconds = [hours integerValue]*3600;
    }
    if([clean containsString:minutesConst]){
        minutes = [clean componentsSeparatedByString:minutesConst][0];
        clean = [clean componentsSeparatedByString:minutesConst][1];
        totalSeconds = totalSeconds + [minutes integerValue]*60;
    }
    if([clean containsString:secondsConst]){
        seconds = [clean componentsSeparatedByString:secondsConst][0];
        totalSeconds = totalSeconds + [seconds integerValue];
    }

    return totalSeconds;
}