word-break: keep-all; but in Swift

KeepAll.playground.swift

import UIKit

class KRLayoutManagerDelegate: NSObject, NSLayoutManagerDelegate {
    func layoutManager(_ layoutManager: NSLayoutManager,
                       shouldBreakLineByWordBeforeCharacterAt charIndex: Int) -> Bool {
        if charIndex <= 0 {
            return true
        }

        let string = layoutManager.textStorage?.string as NSString?
        return string?.character(at: charIndex - 1) == 32 ? true : false
    }
}

var text = UITextView.init(frame: CGRect(x: 0, y: 0, width: 80, height: 100))
text.textContainer.layoutManager?.delegate = KRLayoutManagerDelegate()
text.text = "기사단장 길들이기"

text.text = "돈 공부는 처음이라"

text.text = "이야기 프랑스사"

macOS 11, iOS 14부터 hangulWordPriority를 사용할 수 있는 것으로 보입니다. 출처