I’ve tried to push segue by using UICollectionView (show image form MasterView to DeatilView) but is not working. Xcode also doesn’t show any error message. What’s wrong with my code. I need some advice.
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "showDetail" {
if let indexPath = self.collectionView?.indexPathForCell(sender as! UICollectionViewCell) {
let detailVC = segue.destinationViewController as! DetailMenuViewController
detailVC.picFood = self.collection[indexPath.row]
collection is empty array get data form json
[title = self.nameFood.title], it is working in DetailMenuViewController.swift but not image on code above.
You need to add the UICollecitonViewDelegate
func collectionView(collection: UICollectionView, selectedItemIndex: NSIndexPath)
{
self.performSegueWithIdentifier("showDetail", sender: self)
}
After that add
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "showDetail" {
if let indexPath = self.collectionView?.indexPathForCell(sender as! UICollectionViewCell) {
let detailVC = segue.destinationViewController as! DetailMenuViewController
detailVC.picFood = self.collection[indexPath.row]
}
}
}
Related
I am trying to grab an object from a tableview and pass it to a detail view, something I know how to do in Objective-C but am learning for first time Swift. However, my code is not getting the row from the index path or object.
Here is my code.
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
print("segue")
if segue.identifier == "showDetail"{
if let destinationVC = segue.destination as? detailVC {
)
if let indexPath = self.tableView.indexPathForSelectedRow {
print("row%#",indexPath)//Prints as nil
let thisItem = myItems[indexPath.row]//never gets here
destinationVC.item = thisItem
}
}
}
}
Can anyone see why I am not getting the row or the object? Thanks in advance for any suggestions.
Edit:
I got it to work with following:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "showDetail" {
let indexPath: NSIndexPath = self.tableView.indexPathForSelectedRow! as NSIndexPath
let anItem: myItem = myItems[indexPath.row];
let destVC = segue.destination as? detailVC
destVC?.item = anItem
}
}
Implement UITableViewDelegate method,
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let item = myItems[indexPath.row]
self.performSegue(withIdentifier: "showDetail", sender: item)
}
then implement below,
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "showdetail" {
let detailController = segue.destination as! detailVC
detailController.item = sender as! Your_Item
}
}
Why don't you use these methods to save the value of the selected row or item? and then perform segue?
tableView(_:didDeselectRowAt:)
tableView(_:didSelectRowAt:)
I can list datas in tableview. When I choose a row and trying to pass another view controller with showing specific data related to my pressed cell, It couldn't make it.
I didn't able to store data "selectedMeal" variable in prepareforsegue function, it always return [ ].
I think, my main problem is selecting the cell and sending to this cell to prepare for segue function. Perhaps, it has a problem in DispatchQueue.main.async function.
*When I try to pass to static data, it works great.
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if let cell = tableView.cellForRow(at: indexPath) {
cell.accessoryType = .checkmark;
DispatchQueue.main.async {
self.performSegue(withIdentifier: "gotoOrderDetail", sender: self)
}
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if (segue.identifier == "gotoOrderDetail") {
let DestViewController : OrderDetailListViewController = segue.destination as! OrderDetailListViewController
let selectedMeal = selectedCells.map { (index: Int) -> SavedMeal in
return savedMeal[index]
}
DestViewController.mealarray = selectedMeal
}
}
Try to use this code
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if (segue.identifier == "gotoOrderDetail") {
let DestViewController : OrderDetailListViewController = segue.destination as! OrderDetailListViewController
let path = self.tableView.indexPathForSelectedRow()! // get the selected indexPath
DestViewController.mealarray = savedMeal[path.row]
}
}
Try to use Sender parameter
you can you like this:
self.performSegue(withIdentifier: "gotoOrderDetail", sender: indexPath)
and then in prepare(for segue: sender?)
if (segue.identifier == "gotoOrderDetail") {
let DestViewController : OrderDetailListViewController = segue.destination as! OrderDetailListViewController
let index = sender as! Int
DestViewController.mealarray = savedMeal[index]
}
p/s: you do not need to use dispatch queue in this case
I'm trying to segue and pass data (from UITableView to a UIViewController). My code is
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "IndividualAchievementsSegue" {
let destination = segue.destinationViewController as? IndividualAchievementsViewController
let cell = sender as! UITableViewCell
let selectedRow = AchievementsTable.indexPathForCell(cell)!.row
destination!.viaSegue = achievements[selectedRow]
print(selectedRow)
}
}
but the line let cell = sender as! UITableViewCell is throwing
Could not cast value of type 'ProgramName.AchievementsViewController' to 'UITableViewCell'
I have also tried
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "IndividualAchievementsSegue" {
let destination = segue.destinationViewController as? IndividualAchievementsViewController
let selectedRow = AchievementsTable.indexPathForSelectedRow!.row
destination!.viaSegue = achievements[selectedRow]
print(selectedRow)
}
}
That fails because it finds nil unwrapping the optional during achievements[selectedRow] since that apparently gives me a nil from let selectedRow = AchievementsTable.indexPathForSelectedRow!.row
I think the problem is that your segue is connected with your AchievementsViewController to IndividualAchievementsViewController instead of UITableViewCell to IndividualAchievementsViewController. Check in the storyboard for that and correct the segue with TableCell to IndividualAchievementsViewController.
So the solution was to go into DidSelectrowAtIndexPath and remove DeselectRowAtIndexPath, which was in there twice by accident. Then use the following
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "IndividualAchievementsSegue" {
let destination = segue.destinationViewController as? IndividualAchievementsViewController
let selectedRow = AchievementsTable.indexPathForSelectedRow?.row
destination!.viaSegue = achievements[selectedRow!]
print(selectedRow)
}
}
I am creating a slide menu for ios but I'm having problems
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let DestVC = segue.destinationViewController as ViewController
let indexPath : NSIndexPath = self.tableView.indexPathForSelectedRow()!
DestVC.varView = indexPath.row
}
why doesn't this code work?
You need to make optional cast cause segue.destinationViewController is UIViewController that can't be always casted to its subclass
Try this
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
guard let DestVC = segue.destinationViewController as? ViewController else { return }
let indexPath : NSIndexPath = self.tableView.indexPathForSelectedRow()!
DestVC.varView = indexPath.row
}
I have a school project to make a swift app. I'm very new to swift and trying to pass data through the segue from a tableview to another view.
Here is the project file Download Here.
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "PopularDetails" {
let detailsViewController = segue.destinationViewController as DetailsViewController
let selectedIndexPath = popularTableView.indexPathForSelectedRow()
detailsViewController.shots = shots[selectedIndexPath.row]
}
}
}
.indexPathForSelectedRow() returns an optional. You have to unwrap it, before you can access its properties. Try:
let selectedIndexPath = popularTableView.indexPathForSelectedRow()
detailsViewController.shots = shots[selectedIndexPath!.row]
(see the exclamationmark)
Although #gutenmorgenuhu is correct, it's probably better practice to use:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "PopularDetails" {
if let detailsViewController = segue.destinationViewController as? DetailsViewController {
if let selectedIndexPath = popularTableView.indexPathForSelectedRow() {
detailsViewController.shots = shots[selectedIndexPath.row]
}
}
}
}