NSDate *dates = [self.datePickerView date];
NSTimeInterval interval = 20 * 60;
NSDate *detea = [NSDate dateWithTimeInterval:interval sinceDate:dates];
NSDateFormatter? *dateformatter=[[NSDateFormatter alloc] init];
[dateformatter setDateFormat:@"yyyyMMddHHmm"];
NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"BeiJing"];
[dateformatter setTimeZone:timeZone];
NSString *? locationString=[dateformatter stringFromDate:detea];
return locationString;
