无法将类型“[[String : AnyObject]]”的值分配给类型“[[String : AnyObject?]]”

Question

我收到以下错误：

Cannot assign value of type '[[String : AnyObject]]' to type '[[String : AnyObject?]]'

奇怪的是，当我重新启动我的 Xcode 之前，这个作业是有效的，我开始收到这个错误。根据我在网上阅读的内容，这应该不会出错。

这是我的代码：

    import UIKit
    import  Alamofire
    import SwiftyJSON

  class Signal Condo TableViewController: UITableViewController {
  @IBOutlet var tableview: UITableView!

var singleCondoData =  [[String:AnyObject]]()
var CondoIndivi = [[String:AnyObject]]()

override func viewDidLoad() {
    super.viewDidLoad()

    // Uncomment the following line to preserve selection between presentations
    // self.clearsSelectionOnViewWillAppear = false

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    // self.navigationItem.rightBarButtonItem = self.editButtonItem()

    self.tableView.delegate = self
    self.tableView.dataSource = self
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

// MARK: - Table view data source

override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    // #warning Incomplete implementation, return the number of sections
    return 1
}

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows
    return singleCondoData.count
}


override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! SignleTableTableViewCell


    if singleCondoData.count != 0 {


        let dict = singleCondoData[indexPath.row] as NSDictionary


        //cell.label1.text? = (dict["name"] as? String)!

        if let nullcheck = (dict["address"] as? String) {
            cell.label2.text? = nullcheck
        }

    }



    return cell
}



override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

    let dict = singleCondoData[indexPath.row] as NSDictionary


    if let unitNullCheck = (dict["mls_number"] as? String) {
        let item_id = unitNullCheck
        getCondoUnits(item_id)
        print(item_id)

    }



}

   //get the individual condo id

func getCondoUnits(condo_id : String){


    Alamofire.request(.GET, "http://android.goidx.com/search/?mls_number=" + String(condo_id)).validate().responseJSON { response in

        if let value  = response.result.value {
            let json = JSON(value)

            if let resData = json.arrayObject {

                self.CondoIndivi = (resData as? [[String:AnyObject]])!

                print(self.CondoIndivi)


            }

            if self.CondoIndivi.count > 0 {

                self.tableview.reloadData()
            }


        }

    }

}



override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if let identifier = segue.identifier {


        switch identifier  {

        case "details" :


            let buildingdDetailVC = segue.destinationViewController as! DetailsViewController 


            buildingdDetailVC.CondoIndivi2  = self.CondoIndivi // line of the error 
           default:
            break
        }

       }

       }


       }

Answer 1

CondoIndivi2 变量的类型是 [[String: AnyObject?]] 但您传递的是 [[String: AnyObject]] 类型的数组，其中字典值是非选修的。

由于任何具有相同类型的非可选值都可以安全地转换为其对应的可选值，您可以执行以下操作：

buildingdDetailVC.CondoIndivi2  = self.CondoIndivi.map { [=10=] as [String: AnyObject?] }

无法将类型“[[String : AnyObject]]”的值分配给类型“[[String : AnyObject?]]”

Cannot assign value of type '[[String : AnyObject]]' to type '[[String : AnyObject?]]'

arrays

swift

swift-dictionary