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aainaj/CountLinesForMaxHeight.swift

Last active June 10, 2019 00:22
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Count number of lines of uilabel for max height
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CountLinesForMaxHeight.swift
func countLines(of label: UILabel, maxHeight: CGFloat) -> Int {
// viewDidLayoutSubviews() in ViewController or layoutIfNeeded() in view subclass
guard let labelText = label.text else {
return 0
}
let rect = CGSize(width: label.bounds.width, height: maxHeight)
let labelSize = labelText.boundingRect(with: rect, options: .usesLineFragmentOrigin, attributes: [NSAttributedString.Key.font: label.font!], context: nil)
return Int(ceil(CGFloat(labelSize.height) / label.font.lineHeight))
}
label.numberOfLines = countLines(of: label, maxHeight: 180)
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