当我输入此代码时，我收到此错误。
错误：无法将类型为"[NSObject：AnyObject]"类型的值下标为"NSKeyValueChangeKey"的索引
func observeValueForKeyPath(keyPath: String, ofObject object: AnyObject, change: [NSObject : AnyObject], context: UnsafeMutableRawPointer) {
if !didFindMyLocation {
let myLocation: CLLocation = change[NSKeyValueChangeNewKey] as CLLocation
viewMap.camera = GMSCameraPosition.camera(withTarget: myLocation.coordinate, zoom: 10.0)
viewMap.settings.myLocationButton = true
didFindMyLocation = true
}
}
这是observeValue(forKeyPath:of:change:context:)(Swift 4( 的正确签名：
func observeValue(forKeyPath keyPath: String?,
of object: Any?,
change: [NSKeyValueChangeKey : Any]?,
context: UnsafeMutableRawPointer?)
无论语言版本如何，您的关键是将change: [NSObject : AnyObject]更改为change: [NSKeyValueChangeKey : Any]?.