ios - 无法将 '[String : String?]'类型的值转换为期望的参数类型 '[String : AnyObject?]'

我是Swift的新手，我遵循了此教程:有关MapKit的http://www.raywenderlich.com/90971/introduction-mapkit-swift-tutorial。问题是我在这行代码上出现错误

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

错误描述在标题上。包含此行的方法是:

func mapItem() -> MKMapItem {
    let addressDict = [String(kABPersonAddressStreetKey): self.subtitle]
    let placemark = MKPlacemark(coordinate: self.coordinate, addressDictionary: addressDict)

    let mapItem = MKMapItem(placemark: placemark)
    mapItem.name = self.title

    return mapItem
}

请帮忙。

最佳答案

您需要将subtitle转换为AnyObject，如下所示:

let addressDict = [String(kABPersonAddressStreetKey): self.subtitle as! AnyObject]

您的完整代码将是:

func mapItem() -> MKMapItem {
    let addressDict = [String(kABPersonAddressStreetKey): self.subtitle as! AnyObject]
    let placemark = MKPlacemark(coordinate: self.coordinate, addressDictionary: addressDict)

    let mapItem = MKMapItem(placemark: placemark)
    mapItem.name = self.title

    return mapItem
  }