将缺少的三角形(工具提示)添加到标注自定义MKAnnotationView子类

// 自定义MKAnnotationView子类
class CustomAnnotationView: MKAnnotationView {
    var triangleView: UIView?
    
    override func didMoveToSuperview() {
        super.didMoveToSuperview()
        
        if triangleView == nil {
            // 创建三角形视图
            triangleView = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 10))
            triangleView?.backgroundColor = UIColor.red
            triangleView?.layer.cornerRadius = 5
            triangleView?.layer.masksToBounds = true
            
            // 添加三角形视图
            addSubview(triangleView!)
        }
    }
    
    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)
        
        triangleView?.isHidden = !selected
    }
    
    override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
        if let triangleView = triangleView, triangleView.frame.contains(point) {
            // 处理点击事件
            return triangleView
        }
        
        return super.hitTest(point, with: event)
    }
}