iOS：将NSDate转换为当前时区时间

　 NSDate *date = [NSDate date];

    

    NSTimeZone *zone = [NSTimeZone systemTimeZone];

    

    NSInteger interval = [zone secondsFromGMTForDate:date];

    

    NSDate *localeDate = [date  dateByAddingTimeInterval: interval];

    

    NSLog(@"%@", localeDate);