objc convert unix date

Question

Hi guys, I got a small problem . I have this date format from .net json output:

Date(1280471989140);

when I try to convert using

+ (NSDate*)dateFromUnixDate:(double)unixdate {
    NSTimeInterval unixDate = unixdate;
    return [NSDate dateWithTimeIntervalSince1970:unixDate];}

but I got the wrong date back,why?

thanks

Answer 1

I just did some checking, JSON Date format is in milliseconds since 1970, not seconds. To make this work you want to change your function to

+ (NSDate*)dateFromUnixDate:(double)unixdate 
{
    NSTimeInterval unixDate = unixdate / 1000.0;
    return [NSDate dateWithTimeIntervalSince1970:unixDate];
}

or without a category method this can work as well

int main(int argc, char *argv[]) 
{
    uint64_t jsonDate = 1280471989140UL;
 NSTimeInterval unixDate = (double)jsonDate / 1000.0;
 NSDate *date = [NSDate dateWithTimeIntervalSince1970:unixDate];
 NSLog(@"%@",date);
}