Swift 2 / Xcode 7.2 和 Swift 1.2 / Xcode 6.3 中 MapKit 之间的冲突

Question

我正在使用 MapKit 教程 http://www.raywenderlich.com/90971/introduction-mapkit-swift-tutorial

使用Swift 1.2 和Xcode 6.3 进行教学。然而，在我的项目中，我遇到了一些错误。下面的代码直接来自

的教程

我已经分解了下面标记为 (A) 和 (B) 的代码中的相关行。各自报错如下：

(A) `调用中缺少参数标签 'rawValue.' - 添加 rawValue 参数标签没有帮助

(B) 调用中的额外参数 'error' - 删除 'error' 参数没有帮助

import UIKit
import MapKit

class ViewController: UIViewController {

    @IBOutlet weak var mapView: MKMapView!
    var artworks = [Artwork]()
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        let initialLocation = CLLocation(latitude: 21.282778, longitude: -157.829444)
        centerLocationOnMap(initialLocation)

        mapView.delegate = self

        // show artwork on map
        let artwork = Artwork(title: "King David Kalakaua",
            locationName: "Waikiki Gateway Park",
            discipline: "Sculpture",
            coordinate: CLLocationCoordinate2D(latitude: 21.283921, longitude: -157.831661)
        )

        mapView.addAnnotation(artwork)

    }

    let regionRadius: CLLocationDistance = 1000;
    func centerLocationOnMap(location: CLLocation) {
        let regionCoordinates = MKCoordinateRegionMakeWithDistance(location.coordinate, regionRadius * 2.0, regionRadius * 2.0)
        mapView.setRegion(regionCoordinates, animated: true)
    }


func loadInitialData() {

  let fileName = NSBundle.mainBundle().pathForResource("PublicArt", ofType: "json");
  var readError : NSError?

(A)

  var data: NSData = NSData(contentsOfFile: fileName!, options: NSDataReadingOptions(0), error: &readError)!
  var error: NSError?

(B)

let jsonObject: AnyObject! = NSJSONSerialization.JSONObjectWithData(data, 
    options: NSJSONReadingOptions(0), error: &error)

.

  if let jsonObject = jsonObject as? [String: AnyObject] where error == nil,
  let jsonData = JSONValue.fromObject(jsonObject)?["data"]?.array {
    for artworkJSON in jsonData {
      if let artworkJSON = artworkJSON.array,
      // 5
      artwork = Artwork.fromJSON(artworkJSON) {
        artworks.append(artwork)
      }
    }
  }
}

Answer 1

swift2 中的方法签名更改你可以看看 NSData 和 NSJSONSerialization 苹果文档

您必须在调用函数之前删除错误参数并使用 try

对于选项，您可以输入 [] -> 无选项

try NSData(contentsOfFile: fileName!, options: [])

try NSJSONSerialization.

见

并且您必须使用 do { code } catch { } 捕获错误，或者仅出于测试目的使用 try！

Swift 2 / Xcode 7.2 和 Swift 1.2 / Xcode 6.3 中 MapKit 之间的冲突

Conflict between MapKit in Swift 2 / Xcode 7.2 and Swift 1.2 / Xcode 6.3

mapkit

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swift2