iOS: Delete file in .DocumentDirectory using Swift2

Question

I have a project I'm working on that saves data to a PDF. The code for this is:

// Save PDF Data

let recipeItemName = nameTextField.text

let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0]

pdfData.writeToFile("\(documentsPath)/\(recipeFileName).pdf", atomically: true)

I'm able to view the files in a separate UITableView I have in another ViewController. When the user swipes the UITableViewCell I want it to also delete the item from the .DocumentDirectory. My code for the UITableView delete is:

func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {

    if editingStyle == .Delete {

        // Delete the row from the data source

        savedPDFFiles.removeAtIndex(indexPath.row)

        // Delete actual row

        tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)


        // Deletion code for deleting from .DocumentDirectory here???


    } else if editingStyle == .Insert {

        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view

    }

}

I've tried finding the answer online but can't find anything for Swift 2. Can someone please help?

I've tried working with this but with no luck:

var fileManager:NSFileManager = NSFileManager.defaultManager()
var error:NSErrorPointer = NSErrorPointer()
fileManager.removeItemAtPath(filePath, error: error)

I just want to remove the particular item swiped and not all data in the DocumentDirectory.

Answer 1

removeItemAtPath:error: is the Objective-C version. For swift, you want removeItemAtPath, like this:

    do {
       try NSFileManager.defaultManager().removeItemAtPath(path)
    } catch {}

In swift, this is a pretty common pattern when working with methods that will throw - prefix the call with try and enclose in do-catch. You will be doing less with error pointers then you would in objective-c. Instead, the errors need to be caught or, as in the snippet above, ignored. To catch and handle the error, you could do your delete like this:

    do {
        let fileManager = NSFileManager.defaultManager()
        let documentDirectoryURLs = fileManager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)

        if let filePath = documentDirectoryURLs.first?.URLByAppendingPathComponent("myFile.pdf").path {
            try fileManager.removeItemAtPath(filePath)
        }

    } catch let error as NSError {
        print("ERROR: \(error)")
    }