NSDate 时区转换问题

一：

  NSDateFormatter *dateFormater = [[NSDateFormatter alloc]init];
    [dateFormater setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSTimeZone* localzone = [NSTimeZone localTimeZone];
    NSTimeZone* GTMzone = [NSTimeZone timeZoneForSecondsFromGMT:];
    [dateFormater setTimeZone:GTMzone];
    [dateFormater setTimeZone:localzone];

    NSString *aStrDate = [[NSString alloc]initWithString:[dateFormater stringFromDate:[NSDate date]]];
    NSString *sendText = [NSString stringWithFormat:@"app测试发送：%@", aStrDate];
    NSLog(@"the send --> %@",sendText);

二：

1. NSTimeZone* localzone = [NSTimeZone localTimeZone];
2. NSTimeZone* GTMzone = [NSTimeZone timeZoneForSecondsFromGMT:0];
3. NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
4. [dateFormatter setDateFormat:GLOBAL_TIMEFORMAT];
5. [dateFormatter setTimeZone:GTMzone];
6. NSDate *bdate = [dateFormatter dateFromString:GLOBAL_TIMEBASE];
7. NSDate *day = [NSDate dateWithTimeInterval:(3600 + [localzone secondsFromGMT]) sinceDate:bdate];
8. NSString *text = [dateFormatter stringFromDate:day];