Getting autocomplete to work in swift

Question

I am trying to implement autocompletion, but can\'t find an example that works in Swift. Below, I\'m tring to convert Ray Wenderlich\'s autocompletion tutorial and example c

Answer 1

Here's a way to add multiple tags based on "#" being typed in like twitter.

Variable typedSubstring is the global substring.

  func textField(textField: UITextField!, shouldChangeCharactersInRange range: NSRange, replacementString string: String!) -> Bool {

autocompleteTableView!.hidden = false
var changedText = (self.textField.text as NSString).stringByReplacingCharactersInRange(range, withString: string)
var items = changedText.componentsSeparatedByString("#")

if (items.count > 0) {
  typedSubstring  = "#" + items.lastObject as NSString

  self.searchAutocompleteEntriesWithSubstring(typedSubstring)
}

return true

}

Improved on DrWhat's solution so that when you select a cell, it appends it correctly after where the user has already typed in.

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) 
let selectedCell : UITableViewCell = tableView.cellForRowAtIndexPath(indexPath)!

let selectedText = selectedCell.textLabel?.text as String!

// Remove what has been typed already
let trimmedString = selectedText.stringByReplacingOccurrencesOfString(typedSubstring, withString: "", options: NSStringCompareOptions.LiteralSearch, range: nil)

var currentTextField = textField.text

// then append to what has been typed
textField.text = currentTextField + trimmedString