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brownsoo/UITextView+numberOfLines.swift

Created July 24, 2024 00:02
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UITextView 라인수 계산
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UITextView+numberOfLines.swift
import Foundation
import UIKit
public extension UITextView {
func numberOfLines() -> Int {
let numberOfGlyphs = base.layoutManager.numberOfGlyphs
var index = 0, lineCount = 0
var lineRange = NSRange(location: NSNotFound, length: 0)
while index < numberOfGlyphs {
base.layoutManager.lineFragmentRect(forGlyphAt: index, effectiveRange: &lineRange)
index = NSMaxRange(lineRange)
lineCount += 1
}
return lineCount
}
}
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