ios - 无法将类型 '[String : String?]' 的值转换为预期的参数类型 '[String : AnyObject?]'

Question

我是 Swift 的新手，我遵循了本教程:http://www.raywenderlich.com/90971/introduction-mapkit-swift-tutorial关于 MapKit。问题是我在这行代码上出错了

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

标题中描述了错误。包含这一行的方法是:

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。

Answer 1

您需要将subtitle 转换为AnyObject，如下所示:

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

你的完整代码将是:

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
  }