I have created a program with several screens that display sets of random numbers; it all works perfectly fine while populating the labels.
For one of the screens I need to show two independent results though. I tried this with Label and it didn't look all to well, so I thought about using TableView and now it is quite a challenge to actually push the result data to the rows of the table.
The code looks like this:
class EController: UIViewController {
@IBOutlet var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
tableView.dataSource = self
}
func allTogether(_ SetB:Set<Int>, _ Scope:ClosedRange<Int>) -> (Set<Int>){
func iterateNremove2() -> (Set<Int>, Set<Int>){
var nums = SetB
let scp = Scope
var reslts = Set<Int>()
for _ in scp{
let randNum = nums.randomElement()!
reslts.insert(randNum)
nums.remove(randNum)
}
return (nums, reslts)
}
let go = iterateNremove2()
let res = go.1
return (res)
}
@IBAction func Erand(_ sender: Any) {
let it = allTogether(Set(1...45), 1...10)
let that = allTogether(Set(1...9), 1...3)
let eStrngM = it.map(String.init).joined(separator: ", ")
let eStrngS = that.map(String.init).joined(separator: ", ")
let finRslts = [eStrngM, eStrngS]
}
}
extension EController: UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 2
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) ->UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel?.text = finRslts[indexPath.row]
return cell
}
}
Sorry for such a big bulk, but the problem might be scattered in the code or the whole solution might be faulty (this is what I came up with after I watched the tutorials).
The only error I get is "Cannot find finRslts in scope" when "cell.textLabel?.text" is called.
I tried moving the randomizing function and the button's @IBAction between different classes and the error was always the same. I either miss something small and don't know how to search for it or the whole solution is faulty. Please help.
You have to create finRslts – by the way Swift doesn't have a 8+3 variable name restriction like in Windows 95 – on the top level of the class right after the table view outlet.
var finalResults = [String]()
In Erand replace
let finRslts = [eStrngM, eStrngS]
with
finalResults = [eStrngM, eStrngS]
tableView.reloadData()
And it's good practice to return the number of items in the array in numberOfRowsInSection
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return finalResults.count
}