HMTextView

Regex Reference and Android Version (.kt)

Example

To run the example project, clone the repo, and run pod install from the Example directory first.

Requirements

Installation

Manual

1. Clone this repo
2. Navigate to project folder
3. Copy Source to your project

Using Cocoapods

HMTextView is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'HMTextView'

Usage

1. import HMTextView in which class you want to use.
2. Create a UITextView with class HMTextView
3. Update configuration parameters if necessary.

Code

In your view controller after creating a HMTextView, for example called hmTextView

Protocols

HMTextView Specific
/// Returns all links in the text view
func links(hashtags: [String], mentions: [String])
/// Click event of a link
func clicked(on link: String, type: HMType)
/// When enter a'#' or '@'
func readyToEnter(link_with type: HMType)
/// When stopped entering a link
func stoppedEntering(link_with type: HMType)
/// When character limit reached
func charLimitReached()
/// If character limit will not be reached
func charLimitAvailable()
/// Chars written so far and remained char count
func chars(_ written: Int, _ remained: Int)

Common Methods
/// Same with textViewShouldBeginEditing
func shouldBeginEditing(_ textView: UITextView)
/// Same with textViewDidEndEditing
func didEndEditing(_ textView: UITextView)
/// Same with textViewDidBeginEditing
func didBeginEditing(_ textView: UITextView)
/// Same with textViewDidChangeSelection
func didChangeSelection(_ textView: UITextView)
/// Same with textViewShouldEndEditing
func shouldEndEditing(_ textView: UITextView)
/// Same with textViewDidChange
func didChange(_ textView: UITextView)
/// Same with shouldChangeTextIn
func shouldChangeTextIn(_ textView: UITextView,
                        _ range: NSRange,
                        _ replacementText: String,
                        _ returning: Bool)

Configuration

override func viewDidLoad() {
    super.viewDidLoad()
    
    hmTextViewDelegate = self
    
    hmTextView.textAttributes = [
        NSAttributedString.Key.foregroundColor: UIColor.white,
        NSAttributedString.Key.font: UIFont.systemFont(ofSize: 15)
    ]
    hmTextView.linkAttributes = [
        NSAttributedString.Key.foregroundColor: UIColor.red
    ]
    hmTextView.hashtagFont = UIFont.boldSystemFont(ofSize: 20)
    hmTextView.mentionFont = UIFont.boldSystemFont(ofSize: 12)
}

Configuration Parameters

/// Main regex for detecting hashtag and mention. You Can update this with your own.<br/>
public var regex = "(?<=\\s|^)([@#][\\p{L}\\d]+[._]\\p{L}+|[#@][\\p{L}\\d]*)(?=[']\\p{L}+|[.,;:?!](?:\\s|$)|\\s|$)"

/// Line spacing of the paragraph style.
public var lineSpacing: CGFloat = 0

/// Letter spacing of the paragraph style.
public var kern: CGFloat = 0.0

/// Allow links start with numbers.
public var allowLinksStartWithNumber: Bool = false

/// Set minimum character count for links.
public var minimumLinkCharCount: Int = 3

/// Turn this to false if you don't want to highlight hashtags.
public var detectHashtags: Bool = true

/// Turn this to false if you don't want to highlight mentions.
public var detectMentions: Bool = true

/// Updates the hashtag font.
public var hashtagFont: UIFont = UIFont.boldSystemFont(ofSize: 17)

/// Updates the mention font.
public var mentionFont: UIFont = UIFont.boldSystemFont(ofSize: 17)

/// Update general text attributes.
public var textAttributes = [
    NSAttributedString.Key.foregroundColor: UIColor.black,
    NSAttributedString.Key.font: UIFont.systemFont(ofSize: 17)
]

/// Update link attributes.
public var linkAttributes: [NSAttributedString.Key: Any]! {
    didSet {
        self.linkTextAttributes = self.linkAttributes
    }
}

/// Character count.
public var charCount: Int = -1

Resources Used:

https://www.hackingwithswift.com/articles/108/how-to-use-regular-expressions-in-swift
https://stackoverflow.com/a/48938881
https://stackoverflow.com/a/24144365

Author

gokhanmandaci, gokhanmandaci@gmail.com

License

HMTextView is available under the MIT license. See the LICENSE file for more info.