Border around every word of UILabel

问题

Is there a way i can draw border around every word of UILabel. Suppose UILabel contains the string " This is the Line 1".

I want 5 different border around 5 words

This

Is

the

Line

1

回答1:

I am not aware of an easy to use code for UILabel, but for UITextView:

Swift playground

setup:

import UIKit

let string = "Lorem ipsum dolor sit amet"

let textView = UITextView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
textView.text = string

use regular expressions get a match for every word:

let pattern = "[a-zA-Z0-9]+"
let regex = try! NSRegularExpression(pattern: pattern, options: [])
let matches = regex.matchesInString(string, options: [], range: NSMakeRange(0, string.characters.count))

function to get a rect for each match (ported from this answer):

func frameOfTextInRange(range:NSRange, inTextView textView:UITextView) -> CGRect {
    let beginning = textView.beginningOfDocument
    let start = textView.positionFromPosition(beginning, offset: range.location)!
    let end = textView.positionFromPosition(start, offset: range.length)!
    let textRange = textView.textRangeFromPosition(start, toPosition: end)!
    let rect = textView.firstRectForRange(textRange)
    return textView.convertRect(rect, fromView: textView)
}

iterate over each match, get its frame, use it to create a view for the background, add it to the text view:

for m in matches {
    let range = m.range
    let frame = frameOfTextInRange(range, inTextView: textView)
    let v = UIView(frame: frame)
    v.layer.borderWidth = 1
    v.layer.borderColor = UIColor.blueColor().CGColor
    textView.addSubview(v)

}

But possibly this doesn't give the result you were expecting. To get a better controls, you could use attributed strings.

Here the same code with using attributed strings

import UIKit

let string = "Lorem ipsum dolor sit amet"

let textView = UITextView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))

let attributedString = NSMutableAttributedString(string: string)
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineHeightMultiple = 1.25
attributedString.addAttribute(NSParagraphStyleAttributeName, value: paragraphStyle, range: NSMakeRange(0, string.characters.count))

textView.attributedText = attributedString

let pattern = "[a-zA-Z0-9]+"
let regex = try! NSRegularExpression(pattern: pattern, options: [])
let matches = regex.matchesInString(string, options: [], range: NSMakeRange(0, string.characters.count))

func frameOfTextInRange(range:NSRange, inTextView textView:UITextView) -> CGRect {
    let beginning = textView.beginningOfDocument
    let start = textView.positionFromPosition(beginning, offset: range.location)!
    let end = textView.positionFromPosition(start, offset: range.length)!
    let textRange = textView.textRangeFromPosition(start, toPosition: end)!
    let rect = textView.firstRectForRange(textRange)
    return textView.convertRect(rect, fromView: textView)
}

for m in matches {
    let range = m.range
    var frame = frameOfTextInRange(range, inTextView: textView)
    frame = CGRectInset(frame, CGFloat(-1.2), CGFloat(2))
    frame = CGRectOffset(frame, CGFloat(0), CGFloat(2))
    let v = UIView(frame: frame)
    v.layer.borderWidth = 1
    v.layer.borderColor = UIColor.blueColor().CGColor
    textView.addSubview(v)

}

Also helpful to create beautiful styles would be to add the views to a background view and add that textview on top

import UIKit

let string = "Lorem ipsum dolor sit amet"

let textView = UITextView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
let textViewBG = UIView(frame: textView.bounds)
textViewBG.backgroundColor = UIColor.whiteColor()
let attributedString = NSMutableAttributedString(string: string)
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineHeightMultiple = 1.25
attributedString.addAttribute(NSParagraphStyleAttributeName, value: paragraphStyle, range: NSMakeRange(0, string.characters.count))
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.whiteColor(), range: NSMakeRange(0, string.characters.count))
textView.attributedText = attributedString
textView.backgroundColor = UIColor.clearColor()

let pattern = "[a-zA-Z0-9]+"
let regex = try! NSRegularExpression(pattern: pattern, options: [])
let matches = regex.matchesInString(string, options: [], range: NSMakeRange(0, string.characters.count))

func frameOfTextInRange(range:NSRange, inTextView textView:UITextView) -> CGRect {
    let beginning = textView.beginningOfDocument
    let start = textView.positionFromPosition(beginning, offset: range.location)!
    let end = textView.positionFromPosition(start, offset: range.length)!
    let textRange = textView.textRangeFromPosition(start, toPosition: end)!
    let rect = textView.firstRectForRange(textRange)
    return textView.convertRect(rect, fromView: textView)
}

for m in matches {
    let range = m.range
    var frame = frameOfTextInRange(range, inTextView: textView)
    frame = CGRectInset(frame, CGFloat(-1.2), CGFloat(2))
    frame = CGRectOffset(frame, CGFloat(0), CGFloat(2))
    let v = UIView(frame: frame)
    v.layer.cornerRadius = 2
    v.backgroundColor = UIColor(hue: 0.66, saturation: 0.6, brightness: 1, alpha: 1)
    textViewBG.addSubview(v)

}
textViewBG.addSubview(textView)

to increase the space between the words we can alter the kerning of the whitespace

import UIKit

func frameOfTextInRange(range:NSRange, inTextView textView:UITextView) -> CGRect {
    let beginning = textView.beginningOfDocument
    let start = textView.positionFromPosition(beginning, offset: range.location)!
    let end = textView.positionFromPosition(start, offset: range.length)!
    let textRange = textView.textRangeFromPosition(start, toPosition: end)!
    let rect = textView.firstRectForRange(textRange)
    return textView.convertRect(rect, fromView: textView)
}

let string = "Lorem ipsum dolor sit amet"

let textView = UITextView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
textView.backgroundColor = UIColor.clearColor()

textView.attributedText = {
    let attributedString = NSMutableAttributedString(string: string)
    let paragraphStyle = NSMutableParagraphStyle()
    paragraphStyle.lineHeightMultiple = 1.25
    attributedString.addAttribute(NSParagraphStyleAttributeName, value: paragraphStyle, range: NSMakeRange(0, string.characters.count))
    attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.whiteColor(), range: NSMakeRange(0, string.characters.count))

    let regex = try! NSRegularExpression(pattern: "\\s", options: [])
    let matches = regex.matchesInString(string, options: [], range: NSMakeRange(0, string.characters.count))
    for m in matches {
        attributedString.addAttribute(NSKernAttributeName, value: 6, range: m.range)
    }
    return NSAttributedString(attributedString: attributedString)
}()

let textViewBG = UIView(frame: textView.bounds)
textViewBG.backgroundColor = UIColor.whiteColor()


let pattern = "[^ ]+"
let regex = try! NSRegularExpression(pattern: pattern, options: [])
let matches = regex.matchesInString(string, options: [], range: NSMakeRange(0, string.characters.count))

for m in matches {
    textViewBG.addSubview({
        let range = m.range
        var frame = frameOfTextInRange(range, inTextView: textView)
        frame = CGRectInset(frame, CGFloat(-3), CGFloat(2))
        frame = CGRectOffset(frame, CGFloat(0), CGFloat(3))
        let v = UIView(frame: frame)
        v.layer.cornerRadius = 2
        v.backgroundColor = UIColor(hue: 211.0/360.0, saturation: 0.35, brightness: 0.78    , alpha: 1)
        return v
    }())
}

textViewBG.addSubview(textView)

回答2:

SWIFT 4 Version

This is the swift 4 version of vikingosegundo Answer using a UITextView including a few other tweaks including:
• list of words coming from an array
• Centering in the textView
• Adjustable word limit
• Custom font

//: Playground - noun: a place where people can play

import UIKit

var array = [String]()

array = ["WORD1", "WORD2", "WORD3", "WORD4", "WORD4", "LOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOONGWORD", "WORD5"]

var stringarr = String()

for i in 0...(array.count-1) {

if array[i].count > 20 {
    let count = array[i].count
    let dropCount = count-20
    let dropCharacters = array[i].dropLast(dropCount)
    var shortenedWord = "\(dropCharacters)"
    shortenedWord = "\(shortenedWord)..."
    print(shortenedWord)
    array[i] = shortenedWord

    }
}

stringarr = array.joined(separator: " ")


func frameOfTextInRange(range:NSRange, inTextView textView:UITextView) -> CGRect {
    let beginning = textView.beginningOfDocument
    let start = textView.position(from: beginning, offset: range.location)
    let end = textView.position(from: start!, offset: range.length)
    let textRange = textView.textRange(from: start!, to: end!)
    let rect = textView.firstRect(for: textRange!)

    return textView.convert(rect, from: textView)
}

let textView = UITextView(frame: CGRect(x: 0, y: 0, width: 375, height: 200))
textView.backgroundColor = UIColor.clear

let lineSpacing: CGFloat = 0.0

textView.attributedText = {
    let attributedString = NSMutableAttributedString(string: stringarr)
    let paragraphStyle = NSMutableParagraphStyle()
    paragraphStyle.lineHeightMultiple = 1.5
    paragraphStyle.lineSpacing = lineSpacing
    attributedString.addAttribute(.paragraphStyle, value: paragraphStyle, range: NSRange(location: 0, length: stringarr.count))
    attributedString.addAttribute(.foregroundColor, value: UIColor.white, range: NSRange(location: 0, length: stringarr.count))
    attributedString.addAttribute(.font, value: UIFont(name: "AvenirNext-Regular", size: 10.0)!, range: NSRange(location: 0, length: stringarr.count))


let regex = try! NSRegularExpression(pattern: "\\s", options: [])
let matches = regex.matches(in: stringarr, options: [], range: NSRange(location: 0, length: stringarr.count))

for m in matches {
    attributedString.addAttribute(.kern, value: 6, range: m.range)
}

return NSAttributedString(attributedString: attributedString)
}()


textView.textAlignment = .center

let textViewBG = UIView(frame: textView.bounds)
textViewBG.backgroundColor = UIColor.white

let pattern = "[^ ]+"
let regex = try! NSRegularExpression(pattern: pattern, options: [])
 let matches = regex.matches(in: stringarr, options: [], range: NSRange(location: 0, length: stringarr.count))

for m in matches {
textViewBG.addSubview({
    let range = m.range
    let frame = frameOfTextInRange(range: range, inTextView: textView).insetBy(dx: CGFloat(-2), dy: CGFloat(3)).offsetBy(dx: CGFloat(0), dy: CGFloat(3))
    let v = UIView(frame: frame)
    v.layer.cornerRadius = 0
    v.backgroundColor = UIColor.black
    return v
    }())
}

textViewBG.addSubview(textView)

//: End of playground

Result

Hope that helps!

回答3:

You will have to create one label for each word....do it programmatically! I did it now, test please! hope u enjoy :-)

import UIKit

class ViewController: UIViewController {

var arrayStrings = [String]()
var x : CGFloat = 0
var labelReference = 0

override func viewDidLoad() {
    super.viewDidLoad()


    let space = " "
    let string = "This is the line 1"
    var word = string.componentsSeparatedByString(space)
    print (word[0]) // prints "This"
    print(word[1]) // print "is"

    for var i = 0; i < word.count ; i++ {


        arrayStrings.append(word[i])


        let characteresCount = word[i].characters.count


        // change de "9" based on your font size
        let label = UILabel(frame: CGRectMake(CGFloat(32 + x), 30, CGFloat(characteresCount * 9), 25))
        x += label.frame.size.width + 2
        label.text = word[i]
        label.layer
        label.layer.borderWidth = 1.0
        label.layer.cornerRadius = 10
        view.addSubview(label)


      }

   }

}

来源：https://stackoverflow.com/questions/34039296/border-around-every-word-of-uilabel

标签

ios

swift

uilabel

nsattributedstring