iOS 将服务器返回的时间戳转换成特定时区的时间

#pragma mark -  将时间戳转化成某个时间

- (NSString *)getNowTimestamp:(NSNumber *)timerNumber{

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];

[dateFormatter setDateFormat:@"YYYYMMddHHmm"];

/* 设置时区 */

NSTimeZone *systemZone = [NSTimeZone systemTimeZone];

NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:@"Asia/Shanghai"];

[dateFormatter setTimeZone:timeZone];

NSDate *date = [NSDate dateWithTimeIntervalSince1970:[timerNumber longLongValue]];

NSString *dateString = [dateFormatter stringFromDate:date];

//dateString = [dateString substringToIndex:20];

return  dateString;

}

这里我是以亚洲上海时间为转化