UITextViewの特定の文字をハイパーリンク化してみた。(Swift 3.0対応)
This post is about how to make hyperlink of words in UITextView.
Purpose
Personal Note
Development Environment
- OS X El Captain 10.11.2
- Xcode Version 8.0
Language
Swift 3.0
Step
1- import UIKit to activate the library to use
import UIKit
2- Declare a parameter of firstRange
var firstRange: NSRange = NSRange()
3- Create main two functions (1. Decorate words / 2. Tap Action)
func setHyperLink(targetText: String){
let text = "Hello Qiita Hello Law Hello Guys"
yourTextView.backgroundColor = UIColor.clear
yourTextView.textAlignment = .left
let nsTex = text as NSString
let linkRange = text.range(of: targetText)
let style = NSMutableParagraphStyle()
style.alignment = NSTextAlignment.left
let attributedString = NSMutableAttributedString(string: text, attributes: [ NSParagraphStyleAttributeName: style ])
let firstStart = text.distance(from: text.startIndex, to: linkRange!.lowerBound)
let firstLength = targetText.characters.count
firstRange = NSMakeRange(firstStart, firstLength)
let boldFontAttribute = [NSFontAttributeName: UIFont.boldSystemFont(ofSize: 13.0)]
/*リンク位置範囲生成*/
// all text colour
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.black, range: NSMakeRange(0, nsTex.length))
// link colour
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.black, range: firstRange)
attributedString.addAttributes(boldFontAttribute, range: firstRange)
yourTextView.attributedText = attributedString
let firstTap = UITapGestureRecognizer(target: self, action: #selector(self.tapText(tap:)))
yourTextView.addGestureRecognizer(firstTap)
}
func tapText(tap: UITapGestureRecognizer) {
let location = tap.location(in: yourTextView)
let textPosition = yourTextView.closestPosition(to: location)
let selectedPosition = yourTextView.offset(from: yourTextView.beginningOfDocument, to: textPosition!)
if NSLocationInRange(selectedPosition, firstRange) {
// Add your action. For Example, navigating to another page
print("You tapped")
}
}
}
4- Done
Source Code
ViewController.swift
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var yourTextView: UITextView!
var firstRange: NSRange = NSRange()
override func viewDidLoad() {
super.viewDidLoad()
yourTextView.isEditable = false
setHyperLink(targetText: "Law")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
/* Function */
extension ViewController{
// Hyper Link
func setHyperLink(targetText: String){
let text = "Hello Qiita Hello Law Hello Guys"
yourTextView.backgroundColor = UIColor.clear
yourTextView.textAlignment = .left
let nsTex = text as NSString
let linkRange = text.range(of: targetText)
let style = NSMutableParagraphStyle()
style.alignment = NSTextAlignment.left
let attributedString = NSMutableAttributedString(string: text, attributes: [ NSParagraphStyleAttributeName: style ])
let firstStart = text.distance(from: text.startIndex, to: linkRange!.lowerBound)
let firstLength = targetText.characters.count
firstRange = NSMakeRange(firstStart, firstLength)
let boldFontAttribute = [NSFontAttributeName: UIFont.boldSystemFont(ofSize: 13.0)]
/*リンク位置範囲生成*/
// all text colour
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.black, range: NSMakeRange(0, nsTex.length))
// link colour
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.black, range: firstRange)
attributedString.addAttributes(boldFontAttribute, range: firstRange)
yourTextView.attributedText = attributedString
let firstTap = UITapGestureRecognizer(target: self, action: #selector(self.tapText(tap:)))
yourTextView.addGestureRecognizer(firstTap)
}
func tapText(tap: UITapGestureRecognizer) {
let location = tap.location(in: yourTextView)
let textPosition = yourTextView.closestPosition(to: location)
let selectedPosition = yourTextView.offset(from: yourTextView.beginningOfDocument, to: textPosition!)
if NSLocationInRange(selectedPosition, firstRange) {
// Add your action. For Example, navigating to another page
print("You tapped")
}
}
}
Conclusion
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var yourTextView: UITextView!
var firstRange: NSRange = NSRange()
override func viewDidLoad() {
super.viewDidLoad()
yourTextView.isEditable = false
setHyperLink(targetText: "Law")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
/* Function */
extension ViewController{
// Hyper Link
func setHyperLink(targetText: String){
let text = "Hello Qiita Hello Law Hello Guys"
yourTextView.backgroundColor = UIColor.clear
yourTextView.textAlignment = .left
let nsTex = text as NSString
let linkRange = text.range(of: targetText)
let style = NSMutableParagraphStyle()
style.alignment = NSTextAlignment.left
let attributedString = NSMutableAttributedString(string: text, attributes: [ NSParagraphStyleAttributeName: style ])
let firstStart = text.distance(from: text.startIndex, to: linkRange!.lowerBound)
let firstLength = targetText.characters.count
firstRange = NSMakeRange(firstStart, firstLength)
let boldFontAttribute = [NSFontAttributeName: UIFont.boldSystemFont(ofSize: 13.0)]
/*リンク位置範囲生成*/
// all text colour
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.black, range: NSMakeRange(0, nsTex.length))
// link colour
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.black, range: firstRange)
attributedString.addAttributes(boldFontAttribute, range: firstRange)
yourTextView.attributedText = attributedString
let firstTap = UITapGestureRecognizer(target: self, action: #selector(self.tapText(tap:)))
yourTextView.addGestureRecognizer(firstTap)
}
func tapText(tap: UITapGestureRecognizer) {
let location = tap.location(in: yourTextView)
let textPosition = yourTextView.closestPosition(to: location)
let selectedPosition = yourTextView.offset(from: yourTextView.beginningOfDocument, to: textPosition!)
if NSLocationInRange(selectedPosition, firstRange) {
// Add your action. For Example, navigating to another page
print("You tapped")
}
}
}
The code is quite simple and if you understand how to use Range, you can apply in another way.
Author And Source
この問題について(UITextViewの特定の文字をハイパーリンク化してみた。(Swift 3.0対応)), 我々は、より多くの情報をここで見つけました https://qiita.com/law/items/2cff29463efd92feabf6著者帰属:元の著者の情報は、元のURLに含まれています。著作権は原作者に属する。
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