使用自定义注释时,MapKit蓝点不可见

class MyView: NSView {
    var customComment: String = ""
    
    override func draw(_ rect: NSRect) {
        let context = NSGraphicsContext.current!.cgContext
        context.setFillColor(NSColor.blue.cgColor)
        context.fill(rect)
        
        let bluePoint = CGPoint(x: 0, y: 0)
        context.setStrokeColor(NSColor.red.cgColor)
        context.setLineWidth(1)
        context.move(to: CGPoint(x: 20, y: 20))
        context.lineTo(CGPoint(x: 40, y: 40))
        context.strokePath()
        
        context.setFillColor(NSColor.red.cgColor)
        context.fill(bluePoint)
        
        customComment += "Custom Comment"
        context.setStrokeColor(NSColor.clear.cgColor)
        context.setLineWidth(1)
        context.move(to: bluePoint)
        context.lineTo(CGPoint(x: 40, y: 40))
        context.strokePath()
    }
    
    override func awakeFromNib() {
        super.awakeFromNib()
        
        let view = self.view
        view.addBehavior(NSView.behavior(name: "MyBehavior"))
    }
}