Passing Data to a tableViewController depending on button that was pressed - iphone

Question

i'm a beginner in swift, but I do have a decent background in HTML,CSS, and some Java. I made this account to literally just ask this question, so i'll get straight to the point.
I really enjoy swift, but i've literally spent a f*cking week writing this same code over and over again, reviewing countless tutorials, books, guides, etc. To no avail; and i'm not going to lie, i'm getting reaaaaally tired of seeing 10+ errors stack up in my compiler as I keep trying to figure this out.
I have a ViewController, and I have a TableViewController - the ViewController being my home screen. On said viewController, I have two buttons, one is for BuildingItems, the other is BuildingBlocks. Both of which are segues.
on my TableViewController, I have buildBlocks and buildItems, both of which have their arrays defined.
What i'm trying to do, is depending on the button the user chose, I want that to then be the data that's used to populate my tableview. I can populate the tableview specifically by using the normal cell.textLabel?.text = arrayNameHere[indexPath.row] but obviously that doesn't solve my problem.
I hope that you're able to help me out here. I apologize for the crappy grammar and formatting, i've literally spent 4-5 hours a day this passed week trying to get this to work, and i've ended up just getting angry and deleting my entire project three different times. I'll include the code below. Again, excuse the formatting. I dont know why I can't seem to figure out swift, I keep trying every variation of delegate to try and pass something over that will let it work, but nothing is working.
ViewController:
#IBAction func BuildItems (_sender: Any) {
}
#IBAction func BuildBlocks (_sender: Any) {
}
In TableViewController:
let buildItems = ["these are all my", "arrays for this"]
let buildBlocks = ["same thing here","just saving time"]
class TableViewController: UITableViewController {
var myIndex = 0
override func tableView(_ tableView: UITableView, numberOfRowsInSection: Int) -> Int {
return buildItems.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell" for: indexPath)
cell.textLabel?.text = buildItems[indexPath.row]
return cell
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
myIndex = indexPath.row
}
}

Answer 1

You only need 1 segue: from the ViewController to the TableViewController.
In your ViewController make a variable for which button is pressed:
var category = ""
Change the value when a button is pressed, then segue:
#IBAction func BuildItems (_sender: Any) {
category = "BuildItems"
self.performSegue(withIdentifier: "segue", sender: self)
}
#IBAction func BuildBlocks (_sender: Any) {
category = "BuildBlocks"
self.performSegue(withIdentifier: "segue", sender: self)
}
Then in prepare:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "segue" {
let vc = segue.destination as! TableViewController
// Assuming you created a variable called sentCategory in the TableViewController
vc.sentCategory = category
}
}
In your TableViewController create an empty array:
let data = [String]()
In viewDidLoad:
if sentCategory == "BuildItems" {
data = buildItems
} else {
data = buildBlocks
}
Populate your TableView with the data variable.
A couple comments:
Keep everything in your class scope, unless you have a good reason not to.
You don't need delegates in this scenario. Pass data with a prepare function as shown above.

Answer 2

Create bool var in your tableView controller maybe and helpArray
var dataArray:[String] = []
var isBuildItem:Bool = false
In your first controller implement prepareForSegue method like this:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let vc = segue.destination as? TableViewController {
//set true or false it depends of which button you click
vc.isBuildItem = //true or false
}
}
Then in viewDidLoad in your TableViewController check bool variable
if(isBuildItem:Bool){
dataArray = buildItems
}
else{
dataArray = buildBlocks
}
In all your tableView delegate methods change buildItems array with dataArray

Answer 3

in your ViewController:
import UIKit
var segueName = ""
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
segueName = segue.identifier!
print(segueName)
}
}
TableViewController:
import UIKit
class TableViewController: UITableViewController
{
let animals = ["Cat","Dog","Mouse"]
let colors = ["White","Blue","Red"]
var arrayResult = [""]
override func viewDidLoad()
{
super.viewDidLoad()
if segueName == "seguebuttonA"
{
arrayResult = animals
}
else if segueName == "seguebuttonB"
{
arrayResult = colors
}
}
override func didReceiveMemoryWarning()
{
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int
{
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
// #warning Incomplete implementation, return the number of rows
return arrayResult.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCell(withIdentifier: "cellTest", for: indexPath) as! TableViewCell
// Configure the cell...
cell.titleLabel.text = arrayResult[indexPath.row]
return cell
}
}
Add segue name:
The complete example is in the link below, I hope I have helped, if you have any questions let me know.
https://github.com/cwilliams26/viewSegueTabelview/tree/master