iOS NSDate 与 timestamp 转换
2011-09-27
NSDate *now = [NSDate date];
NSTimeInterval interval = [now timeIntervalSince1970];
NSLog(@"%@", now); // Date
NSLog(@"%f", interval); // Date to Timesatmp
NSLog(@"%@", [NSDate dateWithTimeIntervalSince1970:interval]); // Timestamp to Date