How to use NSDateTimeFormatter to convert this string to UnixTime?

Here is the time string :

30 MAR 2011 10:14:28

And I would like to convert it to the time in millisecond since 1970. How can I do so? Thank开发者_运维技巧 you.

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The class is NSDateFormatter, not NSDateTimeFormatter. You would first initialize the formatter with the appropriate format, something like this:

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"dd MMM yyyy HH:mm:ss"];

Then use it to parse the date string:

NSDate *date = [formatter dateFromString:string];

Then you can easily get a double representing seconds since 1970 from the date:

NSTimeInterval seconds = [date timeIntervalSince1970];

And then multiply by 1000 to get milliseconds.