DelegateProxy 消息转发策略验证

实现思想

1. 订阅一个能触发消息转发的Observable
2. 用户操作触发delegate
3. 打印responds 结果 ， 结果应该是ture
4. 通过一个开关按钮，取消订阅
5. 用户再次操作， 观察结果， 此时应该为false

简单demo

class TextViewController: UIViewController {

    
    var scrollViewDisposable: Disposable!
    
    @IBAction func cancel(_ sender: Any) {
        print("cancel")
        scrollViewDisposable.dispose()
    }
    //@IBOutlet weak var textview: UITextView!
    @IBOutlet weak var scrollView: UIScrollView!
    
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        
        scrollViewDisposable = scrollView.rx.didEndDecelerating.subscribe { print($0) }
        
        
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    

    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    */

}

结论

实验结果符合预期， 也就是说整个消息转发是按需的， 没有订阅者就不会转发消息，避免无谓的性能损害。