I solved it like this
//canvasViewDrawingDidChange add this code
toolPicker.addObserver(canvas)
toolPicker.setVisible(true, forFirstResponder: canvas)
canvas.becomeFirstResponder()
KentaZZ
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I solved it like this
toolPicker.addObserver(canvas)
toolPicker.setVisible(true, forFirstResponder: canvas)
canvas.becomeFirstResponder()