In my initial view there is a blank textField (with an invisible button over it) that segues to a TableView when you click it. I want to send the text data from my TableViewCell selection to the blank textField in the original view.
I've made a View2.swift file, which is a replica of my original View. I was trying to edit the source code in there to push the textData by sending the .text from the indexPath of the TableView.
This video shows how to send data from a first view to a second view, but I'm trying to send data from my second view (TableView) back to my first view (View).
Here is my code:
ViewController.swift
import UIKit
class ViewController: UITableViewController {
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
var DestViewController : View2 = segue.destinationViewController as! View2
DestViewController.formulaSelectionText = ViewController.
}
}
View2.swift:
import Foundation
import UIKit
class View2: UIViewController {
override func viewDidLoad(){
formulaSelection.text = indexPathForCell(Cell: UITableView)
}
}
I assume it would be best to just update the value in the initial view. I'm thinking with a UITextFieldDelegate?
It is easy to pass back UITableViewCell Selected value back to a controller. Simply on selection of a cell, update the textfield's value in previous controller and pop the controller/dismiss it if you are using navigation controller / modal controller.
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
//get last controller in hierarchy
let viewControllers: [UIViewController] = self.navigationController!.viewControllers as [UIViewController];
var prevController : PrevViewController = viewControllers[viewControllers.count - 1] as PrevViewController;
prevController.textfield.text = dataSource[indexPath.row]; //update textfield here
self.navigationController!.popViewControllerAnimated(true);
}
Hope it helps!
Related
I have been searching through many posts on SO but couldn't find an answer to this one.
I have a Table view listing various items. Each cell in the table view has a button that swaps an image around when clicked on, effectively working as an "on" or "off" button to show a user which items in the list they have selected. I have a variable inside my custom Cell Prototype class which stores a value of true or false which is updated every time the button is clicked on.
There is a "Done" button in the Table View that when tapped on calls an unwind Segue to go back to the first View Controller.
When the user taps on the Enter Table View button (on the first View Controller) to display the Table the buttons all go back to their default state, am guessing because each time the segue to the Table View Screen happens it creates a new instance of the Table to be displayed.
What I'm trying to achieve is that the state of the button (either on or off) is retained when going back into the Table screen. I've tried for a while sending an Integer value back from the TableCell Class (using a delegate) to the first View controller and then passing that value back into the Table View controller when the forward segue is called in order to have a "retained from the previous state value" that can be compared against when the cells are created to indicate if a button had been clicked or not. Couldn't get it to work though to save the state of the buttons. The list of Items in the Table will also change depending on what a user adds.
Some Screen shots and the code are below. The code hasn't got the delegate i was trying included (as it didn't work) but if its needed I will edit the post to include it. Any help would be hugely appreciated. Many Thanks!!
Code I have so far is:
//Main View Controller//
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
//segue to the Table View Screen
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "EnterTableView" {
let newTableView = segue.destination as! TableViewController
}
}
// Unwind Segue Called on Exit From Table View
#IBAction func unwindToMainViewController (_segue:UIStoryboardSegue) {
}
}
// Table View Controller //
class TableViewController: UITableViewController {
var dataArray = ["A", "B", "C", "D"]
override func viewDidLoad() {
super.viewDidLoad()
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
//create one section for table
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
//create number of rows based on the number of items in the dataArray set above
return dataArray.count
}
// an array that will contain all the cells
var cellArray = [UITableViewCell] ()
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
//create a new cell based on the cell class "TableViewCell"
let cell = tableView.dequeueReusableCell(withIdentifier: "TableViewCell", for: indexPath) as? TableViewCell
// variable to contain a single element from the dataArray - updates every time a new cell is created
let dataArrayForCells = dataArray [indexPath.row]
//set cell label text to show the value from the dataArrayForCells
cell!.label.text = dataArrayForCells
cellArray.append(cell!)
return cell!
}
// Table Cell Class//
class TableViewCell: UITableViewCell {
#IBOutlet weak var label: UILabel! // label to hold display some text
#IBOutlet weak var buttonImage: UIImageView! //image for button
var buttonClicked = true //variable to contain weather the has been clicked
//if button is tapped on run the below
#IBAction func aButton(_ sender: Any) {
//if button is clicked is true, swap image to red ("on") button, set buttonClicked value to false
if buttonClicked {
buttonImage.image = #imageLiteral(resourceName: "Rec Button Red")
buttonClicked = false
}
// if buttonClicked value is false swap image to grey ("off") button set buttonClicked value back to true
else {
buttonImage.image = #imageLiteral(resourceName: "Rec Button Grey")
buttonClicked = true
}
}
I have a TableSectionHeader xib file with a button in it (and some other stuff). This xib file is used as the custom header of a UItableview inside my PostViewController.
I want to be able to click on that button to show the detail about the cell. However, as the button is INSIDE the xib file, the IBAction is inside the TableSectionHeader.Swift (which inherits from UITableViewHeaderFooterView). This means that I can not segue or instantiate a VC.
How could I go from this button that is inside the xib file to another VC?
You need to get an outlet of your button into your xib class not an action , and when you create and return the header in your view controller , you will have a reference of your button before you return the header, then addTarget to your button and tag with selector to the method that is going to handle going to your next view controller .
In your xib class drag and connect the button :
class YearSectionHeader : UITableViewHeaderFooterView {
#IBOutlet car button :UIButton!
}
In your view controller table view header method (example) don't forget to change the class to and identifier to the correct one your using:
func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let header : YearSectionHeader = tableView.dequeueReusableHeaderFooterViewWithIdentifier("TableHeader") as! YearSectionHeader
header.button.addTarget(self, action: #selector(self.handlingMethodName(_:)), forControlEvents: UIControlEvents.TouchUpInside)
header.button.tag = section
return header
}
sender.tag is your section number, you can perform the segue here :
func handlingMethodName(sender:UIButton){
print(sender.tag)
}
Just piggybacking off of Aaoli's answer here - this code works. I couldn't believe it. You need to connect the IBAction to the XIB file, and also have the exact same IBAction line but without the connection in the View Controller.
XIB File (connect to the cell, but do not add any code:
#IBAction func completePressed(_ sender: UIButton) {
}
View Controller:
#IBAction func completePressed(_ sender: UIButton) {
print("holler")
}
Now, in your View controller where your table view is, put the following code:
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let header : TestCell = itemTableView.dequeueReusableCell(withIdentifier: "testCell") as! TestCell
header.compLabel.addTarget(self, action: #selector(self.completePressed(_:)), for: UIControl.Event.touchUpInside)
header.compLabel.tag = section
return header
}
The fact that this works is amazing, and i have no idea why
I have a button inside a cell (PFQueryTableViewController) that is hidden and I want to unhide it when the user performs a certain segue that I call programatically.
When the user taps the cell it segues to a view controller which displays the contents of the cell full screen... I want the button to unhide in this cell when the segue is called so when the user goes back to the table of cells they can see it on the cell they just tapped.
How can I do this?
Edit after questions:
inside cellRowForIndexPath I have the following for the button
cell.myButton.tag = indexPath.row
cell.myButton.addTarget(self, action: "pressed:", forControlEvents: UIControlEvents.TouchUpInside)
cell.myButton.hidden = true
And the segue itself carries information from the cell (stored in Parse backend) across to FullPostViewController from AllPostsTableViewController. The code for that is this (would I call the unhide in here somewhere?):
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
self.performSegueWithIdentifier("showFullPost", sender: self)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "showFullPost" {
let indexPath = self.tableView.indexPathForSelectedRow
let fullPostVC = segue.destinationViewController as! FullPostViewController
let object = self.objectAtIndexPath(indexPath)
fullPostVC.post = object?.objectForKey("postContent") as? String
let likeCount = object!.objectForKey("likedBy")!.count
fullPostVC.likesCounted = String(likeCount)
self.tableView.deselectRowAtIndexPath(indexPath!, animated: true)
}
}
(Answer thoroughly edited after thorough edit of question)
One possible solution follows below.
Since you mention table cells (each containing a button; I'll assume UIButton), I assume you populate your table view cells with UITableViewCell objects; some fancy subclass to the latter. In this class:
If you haven't already, create an #IBOutlet from your button as a property in this class.
Overload the method setSelected(...) to un-hide your button in case the UITableViewCell is selected (which will precede the segue)
Hence, in your UITableViewCell subclass, you should be able to do something along the lines:
// ...TableViewCell.swift
Import UIKit
// ...
class ...TableViewCell: UITableViewCell {
// Properties
#IBOutlet weak var button: UIButton!
// button contained in UITableViewCell
// ...
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// If table cell is selected (after which segue will follow),
// un-hide button.
if (selected) {
button.hidden = false
}
}
}
Hopefully this will achieve your goal.
I have tableview and I created the custom xib uiview as "detailview" for it. I want to show this detailview at the center of scrolled area when tapped to tableview cell. I can show this view but cannot centralized it. when I set value to frame manually, subview will be at center (approximately) but when I tap the cell which is at the bottom, the subview is appearing at the top of page and also it is moving when i scroll the tableview.
Please help me to show this view at the center of the scrolled area and be fixed
Here is my codes;
Detail View :
class TopTenDetailView: UIView {
var screenWidth:CGFloat = UIScreen.mainScreen().bounds.width*0.08
var screenHeight :CGFloat = UIScreen.mainScreen().bounds.height*0.08
class func instanceFromNib() -> UIView {
return UINib(nibName: "TopTenDetail", bundle: nil).instantiateWithOwner(nil, options: nil)[0] as! UIView
}
override func awakeFromNib() {
super.awakeFromNib()
self.layer.cornerRadius=10
let testFrame : CGRect = CGRectMake(screenWidth,screenHeight,320,480)
self.frame = testFrame
self.userInteractionEnabled=true
}
#IBAction func close(sender: UIButton) {
self.hidden=true
}
}
And TableViewController's method ;
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
var detailView = TopTenDetailView.instanceFromNib
self.view.addSubview(detailView())
}
The way this is setup has many problems and i would be surprised if it actually ever works as intended.
A much better, simpler setup uses a OverFullScreen presentation style and it goes like this:
Create a separate UIViewController for your detail view, let's call it DetailViewController use Interface Builder. Make sure to set the background color to CLEAR
Wire up a segue from the "base" UIViewController that holds your UITableView to DetailViewController and give the segue a name. Let's call it 'detailSegue' , basically drag from one view controller to the other. Make sure that you are not dragging from the view but from the yellow icon at the top of the view controller. You are done in Interface Builder.
Ok, now for the code:
// MARK : - UITableViewDelegate
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
self.performSegueWithIdentifier("detailSegue", sender: self)
}
// MARK: - segues
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if let vc = segue.destinationViewController as? UIViewController{
vc.modalPresentationStyle = .OverFullScreen
}
}
The OverFullScreen presentation style uses a proper UIViewController modal segue but leaves the presenting UIViewController visible under the presented one.
You can then just layout whatever you want on DetailViewController using Interface Builder and autolayout without having to do hacky match calculations on the layout at runtime.
Hope it helps!
I'm trying to pass the selected index number of a listView selection from one ViewController to another but am running into an issue with the tableView didSelectRowAtIndexPath delegate runs slightly later than the prepareForSegue function.
Basically, in didSelectRowAtIndexPath, I seta variable, which is then picked up in the prepareForSegue. The issue is that prepareForSegue seems to run the second that the cell is selected and before the didSelectRowAtIndexPath function is called so my variable is not passed.
My main bits of code are:
tableView didSelectRowAtIndexPath delegate, which sets 'selectedResult'...
func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!) {
selectedResult = indexPath.item
txtNameSearch.resignFirstResponder() //get rid of keyboard when table touched.
println("saved result")
//tableView.deselectRowAtIndexPath(indexPath, animated: false)
//var tappedItem: ToDoItem = self.toDoItems.objectAtIndex(indexPath.row) as ToDoItem
//tappedItem.completed = !tappedItem.completed
//tableView.reloadData()
}
prepareForSegue function which sends the variable as 'toPass' to the other ViewController ('detailViewController'):
override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!){
if (segue.identifier == "detailSeque") {
println("preparing")
var svc = segue!.destinationViewController as detailViewController
svc.toPass = selectedResult
//println(tableView.indexPathsForSelectedRows().
//svc.toPass = tableView.indexPathForSelectedRow()
}
}
Thanks in advance
If you have an outlet to your tableView in your ViewController, you can just call indexPathForSelectedRow in prepareForSegue.
If your ViewController is a subclass of UITableViewController, then you can do:
let row = self.tableView.indexPathForSelectedRow().row
println("row \(row) was selected")
If your ViewController is not a subclass of UITableViewController, set up an IBOutlet to the UITableView in your view controller:
#IBOutlet var tableView: UITableView!
and wire that up in Interface Builder and call it from prepareForSegue as show above.
Instead of triggering your segue directly from a storyboard action, why don't you try programmatically calling performSegueWithIdentifier in your didSelectRowAtIndexPath method, after selectedResult is set?