对成员“下标”Swift 3 的模糊引用

Question

在很多地方更新到 Swift 3 后，我都收到了这个错误，我已经更改了 ?和 ！但是又出现了一个错误（Type [String : AnyObject]?Has not subscript members）

  func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutableRawPointer) {
        if !didFindMyLocation {
            let myLocation: CLLocation = change? [NSKeyValueChangeNewKey] as! CLLocation //Ambiguous reference to member 'subscript'
            viewMap.camera = GMSCameraPosition.camera(withTarget: myLocation.coordinate, zoom: 10.0)
            viewMap.settings.myLocationButton = true

            didFindMyLocation = true
        }
    }

Answer 1

如果您添加了override，您将得到第一个提示，即该方法不会覆盖其超类中的任何方法。

签名已更改为

func observeValue(forKeyPath keyPath: String?, 
                           of object: Any?, 
                              change: [NSKeyValueChangeKey : Any]?, 
                             context: UnsafeMutableRawPointer?)