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Swift3 support #5

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Swift3 support #5

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191 changes: 95 additions & 96 deletions AutocompleteField/AutocompleteField.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -19,159 +19,160 @@ public enum AutocompleteType {
@IBDesignable public class AutocompleteField: UITextField
{
// MARK: - public properties

// left/right padding
@IBInspectable public var padding : CGFloat = 0

// the color of the suggestion. Matches the default placeholder color
@IBInspectable public var completionColor : UIColor = UIColor(white: 0, alpha: 0.22)

// Array of suggestions
public var suggestions : [String] = [""]
public var suggestions: [String] = [""]

// The current suggestion shown. Can also be used to force a suggestion
public var suggestion : String? {
didSet {
if let val = suggestion {
setLabelContent(val)
setLabelContent(text: val)
}
}
}

// Move the suggestion label up or down. Sometimes there's a small difference, and this can be used to fix it.
public var pixelCorrection : CGFloat = 0

// Update the suggestion when the text is changed using 'field.text'
override public var text : String? {
didSet {
if let text = text {
self.setLabelContent(text)
self.setLabelContent(text: text)
}
}
}

// The type of autocomplete that should be used
public var autocompleteType : AutocompleteType = .Word


// MARK: - private properties

// the suggestion label
private var label = UILabel()


// MARK: - init functions

override public init(frame: CGRect)
{
super.init(frame: frame)

createNotification()
setupLabel()
}

required public init?(coder aDecoder: NSCoder)
{
super.init(coder: aDecoder)

createNotification()
setupLabel()
}

/**
Create an instance of a AutocompleteField.
- parameter
frame: The fields frame
suggestion: Array of autocomplete strings
Create an instance of a AutocompleteField.
- parameter
frame: The fields frame
suggestion: Array of autocomplete strings
*/
public init(frame: CGRect, suggestions: [String])
{
super.init(frame: frame)

self.suggestions = suggestions
createNotification()
setupLabel()
}


// ovverride to set frame of the suggestion label whenever the textfield frame changes.
public override func layoutSubviews()
{
self.label.frame = CGRectMake(self.padding, self.pixelCorrection, self.frame.width - (self.padding * 2), self.frame.height)
self.label.frame = CGRect(x: self.padding, y: self.pixelCorrection, width: self.frame.width - (self.padding * 2), height: self.frame.height)
super.layoutSubviews()
}

// MARK: - public methods
public func currentSuggestion() -> NSString?
{
return self.suggestion
return self.suggestion as NSString?
}


// MARK: - private methods

/**
Create a notification whenever the text of the field changes.
*/
Create a notification whenever the text of the field changes.
*/
private func createNotification()
{
NSNotificationCenter.defaultCenter().addObserver(
NotificationCenter.default.addObserver(
self,
selector: "textChanged:",
name: UITextFieldTextDidChangeNotification,
selector: #selector(textChanged(notification:)),
name: NSNotification.Name.UITextFieldTextDidChange,
object: self)
}

/**
Sets up the suggestion label with the same font styling and alignment as the textfield.
*/
Sets up the suggestion label with the same font styling and alignment as the textfield.
*/
private func setupLabel()
{
setLabelContent()
self.label.lineBreakMode = .ByClipping

self.label.lineBreakMode = .byClipping

// If the textfield has one of the default styles, we need to create some padding
// otherwise there will be a offset in x-led.
switch self.borderStyle
{
case .RoundedRect, .Bezel, .Line:
self.padding = 8
break;
default:
case .roundedRect, .bezel, .line:
self.padding = 8
break;
default:
break;
}

self.addSubview(self.label)
}


/**
Set content of the suggestion label.
- parameter text: Suggestion text
*/
private func setLabelContent(var text : String = "")
Set content of the suggestion label.
- parameter text: Suggestion text
*/
private func setLabelContent( text : String = "")
{
// label string
var text = text
if(text.characters.count < 1) {
label.attributedText = nil
return
}

// only return first word if in word mode
if(self.autocompleteType == .Word)
{
let words = self.text!.componentsSeparatedByString(" ")
let suggestionWords = text.componentsSeparatedByString(" ")
let words = self.text!.components(separatedBy: " ")
let suggestionWords = self.text!.components(separatedBy: " ")
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This line should not have been changed from the original:
let suggestionWords = text.componentsSeparatedByString(" ")

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Oops, ok, it should be:
let suggestionWords = text.components(separatedBy: " ")
what I meant was, should be text, not self.text!

var string : String = ""
for(var i = 0; i < words.count; i++)
for i in 0 ..< words.count
{
string = string.stringByAppendingString(suggestionWords[i]) + " "
string = string.appending(suggestionWords[i]) + " "
}
text = string
}
// create an attributed string instead of the regular one.

// create an attributed string instead of the regular one.
// In this way we can hide the letters in the suggestion that the user has already written.
let attributedString = NSMutableAttributedString(
string: text,
Expand All @@ -183,86 +184,84 @@ public enum AutocompleteType {
NSForegroundColorAttributeName: self.completionColor
]
)

// Hide the letters that are under the fields text.
// If the suggestion is abcdefgh and the user has written abcd
// we want to hide those letters from the suggestion.
if let inputText = self.text
{
attributedString.addAttribute(NSForegroundColorAttributeName,
value: UIColor.clearColor(),
range: NSRange(location:0, length:inputText.characters.count)
value: UIColor.clear,
range: NSRange(location:0, length:inputText.characters.count)
)
}

label.attributedText = attributedString
label.textAlignment = self.textAlignment
}

/**
Scans through the suggestions array and finds a suggestion that
matches the searchTerm.
- parameter searchTerm: What to search for
- returns A string or nil
Scans through the suggestions array and finds a suggestion that
matches the searchTerm.
- parameter searchTerm: What to search for
- returns A string or nil
*/
private func suggestionToShow(searchTerm : String) -> String
{
var returnString = ""
for suggestion in self.suggestions
{
// Search the suggestion array. User lowercase on both to get a match.
for suggestion in self.suggestions {
// Search the suggestion array. User lowercase on both to get a match.
// Also, if the match is exact we move on.
if( (suggestion != searchTerm) &&
suggestion.lowercaseString.hasPrefix(searchTerm.lowercaseString))
{
if suggestion != searchTerm && suggestion.lowercased().hasPrefix(searchTerm.lowercased()) {
var suggestionToReturn = searchTerm
suggestionToReturn = suggestionToReturn + suggestion.substringWithRange(Range<String.Index>(start: suggestion.startIndex.advancedBy(searchTerm.characters.count), end: suggestion.endIndex))

let range = Range<String.Index>(suggestion.index(suggestion.startIndex, offsetBy: searchTerm.characters.count)..<suggestion.endIndex)
suggestionToReturn = suggestionToReturn + suggestion.substring(with: range)
returnString = suggestionToReturn
break
}
}
self.suggestion = returnString
return returnString
}


// MARK: - Events

/**
Triggered whenever the field text changes.
- parameter notification: The NSNotifcation attached to the event
*/
Triggered whenever the field text changes.
- parameter notification: The NSNotifcation attached to the event
*/
func textChanged(notification: NSNotification)
{
if let text = self.text
{
let suggestion = suggestionToShow(text)
setLabelContent(suggestion)
let suggestion = suggestionToShow(searchTerm: text)
setLabelContent(text: suggestion)
}
}

// ovverride to set padding
public override func textRectForBounds(bounds: CGRect) -> CGRect
public override func textRect(forBounds bounds: CGRect) -> CGRect
{
return CGRectMake(bounds.origin.x + self.padding, bounds.origin.y,
bounds.size.width - (self.padding * 2), bounds.size.height);
return CGRect(x: bounds.origin.x + self.padding, y: bounds.origin.y,
width: bounds.size.width - (self.padding * 2), height: bounds.size.height);
}

// ovverride to set padding
public override func editingRectForBounds(bounds: CGRect) -> CGRect
public override func editingRect(forBounds bounds: CGRect) -> CGRect
{
return self.textRectForBounds(bounds)
return self.textRect(forBounds: bounds)
}

// ovverride to set padding on placeholder
public override func placeholderRectForBounds(bounds: CGRect) -> CGRect
public override func placeholderRect(forBounds bounds: CGRect) -> CGRect
{
return self.textRectForBounds(bounds)
return self.textRect(forBounds: bounds)
}

// remove observer on deinit
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
NotificationCenter.default.removeObserver(self)
}
}
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