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I am developing an app of orders and I am new on it. So, I need to check for updates on my database (using Alamofire accessing my C#/Asp.net backend that checks MySQL. Also using Core Data for my SQLite).
I have been searching the best way of doing everything since few weeks ago, but I am not sure everything is on the best way. Also, I am having some issues.

1. To get changes on MySql, I am using timer to check it on background every hour and then notify user. It doesn’t work on background, just foreground. Could anyone help me, please?
The current code that works foreground, on MainViewController:

DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(5)) 
 //get most recent date from orders
 let strdata = self.getMostRecentDtPedido()
 if self.defaults.getDownloadInitialPedido()
 if strdata != "" 
 self.loadOrdersFromLastSyncByApi(strdata)
 
 
 

 var timer = Timer.scheduledTimer(withTimeInterval: 3600.0, repeats: true) 
 timer in
 self.backgroundTaskPerHour(timer: timer)
 
func backgroundTaskPerHour(timer:Timer) 
 DispatchQueue.global(qos: DispatchQoS.background.qosClass).async 
 let strdata = self.getMostRecentDtPedido()

 if self.defaults.getDownloadInicialPedido()
 if strdata != "" 
 self.loadOrdersFromLastSyncByApi(strdata)
 
 
 
 

2. Besides this issue, everytime I enter MainViewController, this task (from the first DispatchQueue) is dispatched again. I would like it to start just on the first time the user open the app and then per hour. What do I need to change? I thought about creating an auxiliar variable that would be set true or false if it has already gone for the first time, but I think it is too much work. I am pretty sure there is a better way of doing this.

3. Ok, after getting the updated order, Alamofire returns for me an entire order with same Id from existing. The problem is that my order has a lot of attributes and relationships with more and more attributes. I would spend a loooot of time and lines of code updating each field like “order.setValue(“(price)”, forKey: “price”)”. Since this order can update any field, it could be a quantity, date, price, status and their relationship entities. I would like, as I do on my android, to just send the entire object and swift update everything for me. I have been searching and I can’t find something like this. What I did? I get the Id, delete the old order with this Id and all its relationships and create the same again. I know this isn’t the best way. Is there another way of updating the entire object?

I don’t have anyone close to me to discuss those questions. I am new on it and I am having a lot of doubts about other functionalities as well. Is anyone available to discuss some of them, please? I just need some tips, I can search more by myself. Any help is welcome. I would be extremely grateful.