Objective-Cでのタイムスタンプ→日付変換
ちょっとハマったのでメモ。
convert - [iPhone app] Storing a timestamp value and showing it to the UI - Stack Overflow
NSDate *date = [NSDate dateWithTimeIntervalSince1970:(NSTimeInterval)タイムスタンプ];
NSDateFormatter *formatter = [[[NSDateFormatter alloc]init] autorelease];
[formatter setDateFormat:@"yyyy/MM/dd HH:mm:ss"];
NSString *update_date = [formatter stringFromDate:date];
読書の定義