Fatal error. Array index out of range in indexpath - swift - ios

Question

My following code is part of a search controller. It works without a problem but after 8-10 searches, I encounter fatal error (Thread 1 : EXC_BAD_INSTRUCTION) on following line :
let movie = filteredMovies[indexPath.item]
Could you please advise the way of solving this kind of problems.
extension searchResults: UITableViewDataSource, UITableViewDelegate {
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("searchCell", forIndexPath: indexPath) as! searchResultCell
let movie = filteredMovies[indexPath.item]
cell.searchLabel.text = movie.title
let fileUrl = NSURL(string: movie.thumb)!
if let data = NSData(contentsOfURL: fileUrl)
{
cell.searchImage.contentMode = UIViewContentMode.ScaleAspectFit
cell.searchImage.image = UIImage(data: data)
// to make images rounded
cell.searchImage.backgroundColor = UIColor.clearColor()
cell.searchImage.layer.cornerRadius = 15.0
cell.searchImage.clipsToBounds = true
cell.backgroundColor = UIColor.clearColor()
}
return cell
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return filteredMovies.count
}
}

Answer 1

You can check if indexPath.item is within the bounds of the array filteredMovies:
if (indexPath.item >= 0 || indexPath.item < movie.count) {
// now you can safely use filteredMovies[indexPath.item]
} else {
// print something so you can investigate
}
And if you wonder why indexPath.item might be out of the bounds of filteredMovies, it's other programming logic you have to investigate (maybe you remove some elements in filteredMovies after the tableView is loaded).
After all, always checking the bounds is a good thing when you have doubt or want to make sure it will never cause crash (fault tolerance concept).