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キーボードの高さを取得する

Posted at

よく使うけど変換の仕方を忘れがちなので、備忘録として残しておく。

@objc func keyboardDidChangeFrame(_ note: Notification) {
        
        guard
            let value: Any = note.userInfo?[UIResponder.keyboardFrameEndUserInfoKey],
            let frameValue: NSValue = value as? NSValue else
        { return }
        let frame: CGRect = frameValue.cgRectValue
        // https://developer.apple.com/documentation/uikit/uicoordinatespace/1622661-convert
        let convertedFrame: CGRect = view.convert(frameEnd, from: UIScreen.main.coordinateSpace)
        // https://developer.apple.com/documentation/coregraphics/cgrect/1455346-intersection
        let height: CGFloat = view.frame.intersection(convertedFrame).height
        
        // スクロールビューのインセットを調整したりなど
    }

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