This is my first application for iOS.
So I have a UIVIewController
with a UITableView
where I have integrated a UISearchBar
and a UISearchController
in order to filter TableCells to display
override func viewDidLoad() {
menuBar.delegate = self
table.dataSource = self
table.delegate = self
let nib = UINib(nibName: "ItemCellTableViewCell", bundle: nil)
table.registerNib(nib, forCellReuseIdentifier: "Cell")
let searchButton = UIBarButtonItem(barButtonSystemItem: .Search, target: self, action: "search:")
menuBar.topItem?.leftBarButtonItem = searchButton
self.resultSearchController = ({
let controller = UISearchController(searchResultsController: nil)
controller.searchResultsUpdater = self
controller.dimsBackgroundDuringPresentation = false
return controller
})()
self.table.reloadData()
}
I am using also a modal segue in order to open the element's ViewController
where I will display details of the element.
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
self.index = indexPath.row
self.performSegueWithIdentifier("ItemDetailFromHome", sender: self)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if (segue.identifier == "ItemDetailFromHome") {
let settingsVC = segue.destinationViewController as! ItemDetailViewController
settingsVC.parent = self
if self.isSearching == true && self.searchText != nil && self.searchText != "" {
settingsVC.item = self.filteredItems[self.index!]
} else {
settingsVC.item = self.items[self.index!]
}
}
}
That works fine until I try to display the ItemDetailViewController
for a filtered element (through the UISearchController
).
I have the following message :
Warning: Attempt to present <ItemDetailViewController: *> on <HomeViewController: *> which is already presenting (null)
At every time I am going to the ItemDetailViewController.viewDidLoad()
function but after that when the search is activated I have the previous error.
Any idea ? I have tried to use the following async dispatch but without success
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
self.index = indexPath.row
dispatch_async(dispatch_get_main_queue(), { () -> Void in
self.performSegueWithIdentifier("ItemDetailFromHome", sender: self)
})
}
I have found out a solution.
I have add the following code in HomeViewController.viewDidLoad
and that works !
definesPresentationContext = true
In my case, I found my code to present the new viewController (a UIAlertController
) was being called twice.
Check this before messing about with definesPresentationContext
.
In my case, I tried too early to show the new UIViewController before closing the previous one. The problem was solved through a call with a slight delay:
DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
self.callMethod()
}
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