Question

I’m really struggling to convert this timestamp to a nice formatted date string.

Here’s the timestamp: “1316625985”

And here’s the function I’ve made:

-(NSString*)timestamp2date:(NSString*)timestamp{
    NSString * timeStampString =timestamp;
    //[timeStampString stringByAppendingString:@"000"];   //convert to ms
    NSTimeInterval _interval=[timeStampString doubleValue];
    NSDate *date = [NSDate dateWithTimeIntervalSince1970:_interval];
    NSDateFormatter *_formatter=[[NSDateFormatter alloc]init];
    [_formatter setDateFormat:@"dd/MM/yy"];
    return [_formatter stringFromDate:date];
}

Trouble is, it keeps returning dates in 1972! (31/7/72) This is wrong, since it’s a September 2011 date…

Can anyone suggest any solution?

Many thanks in advance,

Answer 1

Did you check that the string (timestampString) and the double value (_interval) are the same, and that the doubleValue does really takes all the characters of your string into account?

Maybe the interpretation of the string into double crops the value?

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Are you also sure that the timestamp you are interpretting is really a UNIX timestamp, meaning it counts the number of seconds elapsed since 01/01/1970 (and not days since 01/01/1970?… or not seconds but since another date?)

(Maybe give an example of the value of the timestamp you are trying to interpret)