Fatal error: Array index out of range in swift2 version - ios

Question

Please help with the error I have
on this line:
cell.name.text = names[indexPath.row] //error array index out of range
This is my declaration:
class ViewController: UIViewController,UITableViewDataSource,UITableViewDelegate {
var names = ["Anna","aanal"]
var petnames = ["Anu","aalu"]
#IBOutlet var tableView: UITableView!
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 3
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! CustomCell
cell.name.text = names[indexPath.row] //error array index out of range
cell.petname.text = petnames[indexPath.row]
return cell
}
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.
}
}

Answer 1

Your array only has 2 elements while your numberOfRowsInSection method returns 3. Either change it to 2 or add 3 elements in your array
The ideal way is to change
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return names.count
}
But usually dont work with 2 arrays and create a Entity object having name and petname as elements and then have an array of your entity class to populate tableview

Answer 2

Try this :
I think your are passed petnames in numberOfRowsInSection and names and petnames count are also different so this problem occurs .
Solution
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if names.count == petnames.count{
return petnames.count
}
return 0;
}
OR
You have passed more numberOfRowsInSection then array.count
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 2 or names.count
}

Answer 3

There are 2 values in your arrays names and petnames. However, there are 3 rows in your Table View. So, if the 3rd row of the table view is selected, it will be out of range of the array as there is no 3rd element in the arrays.
The solution is to make your names array and petnames array contain 3 elements:
var names = ["Anna","aanal", "boo"]
var petnames = ["Anu","aalu", "bo"]
or to return 2 rows in your table view:
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 2
}
The best way is to return the count of the arrays (if the count of both arrays are different, return nothing):
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if names.count == petnames.count {
return names.count
}
return 0
}

Answer 4

Just pass the count of array
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return yourArray.count
}

Answer 5

var names = ["Anna","aanal"] // you have 2 elemnts
var petnames = ["Anu","aalu"]
#IBOutlet var tableView: UITableView!
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
//return 3 // you have returned 3 but it should be 2
// it should be
return 2
//or
// return names.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! CustomCell
cell.name.text = names[indexPath.row] //you got error because you are trying to get 3 element from array where as there are only 2 elements
cell.petname.text = petnames[indexPath.row]
return cell
}
It is better if you use your arrayname.count