我认为在设置fireDate时发生问题，您可以尝试以下方法:

I think problem happen when you set fireDate, you can try this:

NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [[NSDateComponents alloc] init];
[components setDay:day];
[components setMonth:month];
[components setYear:year];
[components setMinute:minutes];
[components setHour:hour];
NSDate *date = [calendar dateFromComponents:components];
localNotif.fireDate = date;