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:0];
    [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：

NSTimeZone* localzone = [NSTimeZone localTimeZone];
NSTimeZone* GTMzone = [NSTimeZone timeZoneForSecondsFromGMT:0];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:GLOBAL_TIMEFORMAT];
[dateFormatter setTimeZone:GTMzone];
NSDate *bdate = [dateFormatter dateFromString:GLOBAL_TIMEBASE];
NSDate *day = [NSDate dateWithTimeInterval:(3600 + [localzone secondsFromGMT]) sinceDate:bdate];
NSString *text = [dateFormatter stringFromDate:day];