iOS中的addObserver位置

class MyViewController: UIViewController {
    var myObject: MyObject
    
    init() {
        myObject = MyObject()
        super.init(nibName: nil, bundle: nil)
        
        // 在初始化方法中添加观察者
        myObject.addObserver(self, forKeyPath: "myProperty", options: .new, context: nil)
    }
    
    deinit {
        // 在对象销毁时移除观察者
        myObject.removeObserver(self, forKeyPath: "myProperty")
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // ...
    }
    
    // 观察者的回调方法
    override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
        if keyPath == "myProperty" {
            // 处理属性变化的逻辑
        }
    }
}

class MyObject: NSObject {
    @objc dynamic var myProperty: String = ""
}