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Swift：NSAttributedStringの高さを計算する

Swift

Posted at 2019-09-30

let attributes: [NSAttributedString.Key : Any] = [
    NSAttributedString.Key.font : NSFont.systemFont(ofSize: fontSize),
    NSAttributedString.Key.foregroundColor : NSColor.red
]

let attrStr = NSAttributedString(string: "Text", attributes: attributes)

let fieldW: CGFloat = 200 // 表示するテキストフィールドの幅
let rect = attrStr.boundingRect(with: NSSize(width: fieldW, height: CGFloat.greatestFiniteMagnitude),
                                            options: [.usesLineFragmentOrigin, .usesFontLeading], context: nil)

let calcHeight: CGFloat = ceil(rect.height)

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