cocoa touch NSDateFormatter and epoch date

问题

I have a string that is (I think) an epoch date. Here is the example string:

1372620996

Heres part of the code:

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
NSDate *offerDate = [dateFormatter dateFromString:@"1372620996"];

This returns a null date, and I'm pretty sure my problem is because I haven't set a dateStyle on my NSDateFormatter. However, I'm not sure what dateStyle to use for an epoch date.

回答1:

It's actually simpler than that to convert to an NSDate;

NSString *dateStr = @"1372620996";
NSDate *date = [NSDate dateWithTimeIntervalSince1970:[dateStr doubleValue]];
NSLog(@"%@", date);

> 2013-06-30 19:36:36 +0000

来源：https://stackoverflow.com/questions/17394555/cocoa-touch-nsdateformatter-and-epoch-date