Question

我需要一些帮助来重建这个功能：

 init(dictionary:[String : AnyObject], acceptedTypes: [String])
    {
        let json = JSON(dictionary)
        name = json["name"].stringValue
        address = json["vicinity"].stringValue

        let lat = json["geometry"]["location"]["lat"].doubleValue as CLLocationDegrees
        let lng = json["geometry"]["location"]["lng"].doubleValue as CLLocationDegrees
        coordinate = CLLocationCoordinate2DMake(lat, lng)

        photoReference = json["photos"][0]["photo_reference"].string

        var foundType = "restaurant"
        let possibleTypes = acceptedTypes.count > 0 ? acceptedTypes : ["bakery", "bar", "cafe", "grocery_or_supermarket", "restaurant"]
        for type in json["types"].arrayObject as! [String] {
            if possibleTypes.contains(type) {
                foundType = type
                break
            }
        }
        placeType = foundType
    }

在另一个功能中：

 func fetchNearbyPlaces(coordinate: CLLocationCoordinate2D) {

        mapView.clear()

        dataProvider.fetchPlacesNearCoordinate(coordinate: coordinate, radius:searchRadius, types: previuosViewTappedButtonsArray as! [String] ) { places in
            for place: GooglePlace in places {

                let marker = PlaceMarker(place: place)

                marker.map = self.mapView
            }
        }
    }

该行崩溃：

types: previuosViewTappedButtonsArray as! [String]

对于错误＆＃34;无法转换类型＆＃39; UIButton＆＃39;到＃NSString＆＃39; ＆＃34;显然这个错误的出现是因为previuosViewTappedButtonsArray的值为UIButton而不是String（所有这些因为我必须修改一个viewController，用一些按钮来改变tableView以选择用户首选项）。

我是编码的初学者，有人可以帮助我正确修改此代码以使其有效吗？（所以我希望代码可以使用previuosViewTappedButtonsArray作为UIButton值）

 var previuosViewTappedButtonsArray = NSMutableArray()

在func fetchNearbyPlaces（）的viewController中，并且是一个数组，其中包含有关在上一个视图中按下的按钮的信息，我在另一个类中也有这个func

 func fetchPlacesNearCoordinate(coordinate: CLLocationCoordinate2D, radius: Double, types:[String], completion: (([GooglePlace]) -> Void)) -> ()
  {
    var urlString = "http://localhost:10000/maps/api/place/nearbysearch/json?location=\(coordinate.latitude),\(coordinate.longitude)&radius=\(radius)&rankby=prominence&sensor=true"
    let typesString = types.count > 0 ? types.joinWithSeparator("|") : "food"
    urlString += "&types=\(typesString)"
    urlString = urlString.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())!

    if let task = placesTask, task.taskIdentifier > 0 && task.state == .Running {
      task.cancel()
    }

    UIApplication.sharedApplication().networkActivityIndicatorVisible = true
    placesTask = session.dataTaskWithURL(NSURL(string: urlString)!) {data, response, error in
      UIApplication.sharedApplication().networkActivityIndicatorVisible = false
      var placesArray = [GooglePlace]()
      if let aData = data {
        let json = JSON(data:aData, options:NSJSONReadingOptions.MutableContainers, error:nil)
        if let results = json["results"].arrayObject as? [[String : AnyObject]] {
          for rawPlace in results {
            let place = GooglePlace(dictionary: rawPlace, acceptedTypes: types)
            placesArray.append(place)
            if let reference = place.photoReference {
              self.fetchPhotoFromReference(reference) { image in
                place.photo = image
              }
            }
          }
        }
      }
      dispatch_async(dispatch_get_main_queue()) {
        completion(placesArray)
      }
    }
    placesTask?.resume()
  }

我不得不用六个按钮更改tableView

protocol TypesTableViewControllerDelegate: class {
  func typesController(controller: TypesTableViewController, didSelectTypes types: [String])
}

class TypesTableViewController: UITableViewController {

  let possibleTypesDictionary = ["bakery":"Bakery", "bar":"Bar", "cafe":"Cafe", "grocery_or_supermarket":"Supermarket", "restaurant":"Restaurant"]
  var selectedTypes: [String]!
  weak var delegate: TypesTableViewControllerDelegate!
  var sortedKeys: [String] {
    return possibleTypesDictionary.keys.sort()
  }


  @IBAction func donePressed(sender: AnyObject) {
    delegate?.typesController(self, didSelectTypes: selectedTypes)
  }

  // MARK: - Table view data source
  override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return possibleTypesDictionary.count
  }

  override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("TypeCell", forIndexPath: indexPath) 
    let key = sortedKeys[indexPath.row]
    let type = possibleTypesDictionary[key]!
    cell.textLabel?.text = type
    cell.imageView?.image = UIImage(named: key)
    cell.accessoryType = (selectedTypes!).contains(key) ? .Checkmark : .None
    return cell
  }

  // MARK: - Table view delegate
  override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    tableView.deselectRowAtIndexPath(indexPath, animated: true)
    let key = sortedKeys[indexPath.row]
    if (selectedTypes!).contains(key) {
      selectedTypes = selectedTypes.filter({$0 != key})
    } else {
      selectedTypes.append(key)
    }

    tableView.reloadData()
  }
}

这是我在添加按钮

之前的tableView代码（swift 2版本）

快速解决某些对象的价值问题

0 个答案: