Variable is nil after assigning value in viewWillAppear

Question

I am new in the async/await in swift and I am trying to assign the job global variable in MyViewController a value using an async function which is then called in the ViewWillAppear. Inside the async function, I get a value for job but when I try to pass that to a cell property in func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell I get nil. Can anyone know why this is happening and how to solve it?

class MyViewController: UIViewController {
  private var job: Job!

  override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    
    Task { [weak self] in
      await self?.getJob()
    }
  }
  

   private func getJob() async {
    job = await viewModel.getJob(byID: "xxxxxxx") // will return a Job Object
    // more code...
    print(job) // it's ok 
  }

  func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 
    
    print(job) // it is nil!!!
  }
}

Answer 1

In this scenario, tableView loads before job data fetch. So you should add tableView.reloadData() after fetch the job data to reload the tableView with new fetched data.

private func getJob() async {
    job = await viewModel.getJob(byID: "xxxxxxx") // will return a Job Object
    // more code...
    tableView.reloadData()
}