Set UITableViewCell selected before presenting - swift

Question

I have a UITableViewCell that I want to show as selected when the UIViewController is presented. vc.tableView.selectRow:atIndexPath is nice in theory but it bypasses the calls for willSelect and didSelect on the cell.
The cell has an exposed UIImageView that setSelected toggles, which is what I'm trying to show on the initial load.
Any help here would be appreciated. Thanks!

Answer 1

I'll give you an example of how change background color of your cells and select a initial one, so you can follow and put the code that you need:
In your UIViewController subclass, implement these methods, so you can put your logic for selected and deselected states:
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let selectedCell = tableView.cellForRow(at: indexPath)!
selectedCell.backgroundColor = UIColor.purple
}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
let deselectedCell = tableView.cellForRow(at: indexPath)!
deselectedCell.backgroundColor = UIColor.clear
}
In your custom UITableViewCell subclass you have to override the isSelected property, this is the key to avoid the method tableView.selectRow:atIndexPath bypassing didSelect:
class CustomTableViewCell: UITableViewCell {
override var isSelected: Bool {
didSet {
print(isSelected.description)
self.selectionStyle = .none
if isSelected{
self.backgroundColor = UIColor.purple
} else {
self.backgroundColor = UIColor.clear
}
}
}
}
Last, back to your UIViewController subclass, you can call selectRow:atIndexPath in your viewDidLoad method, for instance:
override func viewDidLoad(){
super.viewDidLoad()
tableView.selectRow(at: IndexPath(row: 0, section: 0) , animated: true, scrollPosition: UITableViewScrollPosition.none)
}