隔离前如何在Main View Controller中加载Ta​​ble View

Question

Working on Swift 3 Xcode 9.1

I have two view controllers (one MainView and one Table View)

Problem: The Table View loads data from an API and displays it, however it take too long. I'm trying to have the load occur on the Main Controller.

I tried creating a custom method How to instantiate and load a view controller before segueing to it using swift

However the Table View has too many functions and I'm not sure how to call it.

Table View Code:

public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return array.count
}
public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    return cell
}

func loadData(){
 //loads data 
 DispatchQueue.main.sync(execute:{
    self.tableView.reloadData()
}

Question: Is creating a custom method the best way or is there another way? Please note I'm trying to do all this is the Main View Controller so the data can load once I segue to the Table View.

Answer 1

Try putting the API call in the ViewDidAppear Method of the Table View Controller Class. That way the app will segue to the View Controller then call the data. The app will appear faster but take the same amount of time. This way you can also manage timeouts and default data for the ViewDidLoad.

Answer 2

Thank you all for your help!

I actually incorporated FryAnEgg's comment and created a Global Variable in my Main VC to load in the API.

Main VC:

var Global X  

class Main VC: UIViewController {
   loadDataFunc(){
      GlobalX.append(data)
     }
 }

TableView:

public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
  return GlobalX.count //calling Global Variable
  }
public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
  return cell
  }

I then called the Global Variable in the Table View Controller and it worked !

Thanks again everyone

Answer 3

To load tablview in main view before segueing you can use NSNotificationCenter. It is call in ViewDidLoad so it will reload data.