Swift:Can'；使用地址初始化MKPlaceMark

找不到类型“MKPlacemark”的初始值设定项，该初始值设定项接受类型为“（坐标：CLLocationCoordinate2D，addressDictionary:[NSString:String？]）的参数列表

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MLPlacemark的初始化给了我这个错误。我做错了什么？

错误消息中的问号表示

self.store.address1

（以及其他参数）是可选的，需要展开…就是这样。我现在将永远理解这种错误。谢谢

let addressDict =
                [kABPersonAddressStreetKey as NSString: self.store.address1,
                    kABPersonAddressCityKey as NSString: self.store.city,
                    kABPersonAddressStateKey as NSString: self.store.state,
                    kABPersonAddressZIPKey as NSString: self.store.zipCode]

                let place = MKPlacemark(coordinate: placemark.location.coordinate, addressDictionary: addressDict)