无法转换类型为&#39;Swift._SwiftDeferredNSDictionary&#39;的值 <Swift.String, Swift.String> ”到“ NSMutableDictionary”

Question

I have an App written in Swift 3.0 and I declared the following data types:

var movies = [Movie]()
var getPlist = NSMutableDictionary()
var movieItems = NSMutableDictionary()

And I have the following method which is loading the content of a plist:

// Connect to plist and get the data
    if let plist = PlistHandler(name: "MovieData") {
        getPlist = plist.getMutablePlistDict()!

        // Load the movie items into the table view data source
        for i in 0..<getPlist.count {
            movieItems = (getPlist.object(forKey: "Item\(i)") as! NSMutableDictionary) as! [String: String] as! NSMutableDictionary
            let newName = movieItems.object(forKey: "Name")
            let newRemark = movieItems.object(forKey: "Remark")
            if newName as? String != "" {
                movies.append(Movie(name: newName as? String, remark: newRemark as? String)
            )}
        }
    } else {
        print("Unable to get Plist")
    }

It calls a method called getMutablePlistDict() from another class:

// Get the values from plist -> MutableDirectory
func getMutablePlistDict() -> NSMutableDictionary? {

    let fileManager = FileManager.default

    if fileManager.fileExists(atPath: destPath!) {
        guard let dict = NSMutableDictionary(contentsOfFile: destPath!) else { return .none }
        return dict
    } else {
        return .none
    }
}

When I run the App I get the error above (see question title). But this is new. In Xcode 8 I didn't get this error. What is the reason for this and how I have to change my code to avoid that?

Answer 1

You can use like this :

Changed NSMutableDictionary to [String: Any] :

var movies = [Movie]()
var getPlist: [String: Any] = [:]
var movieItems: [String: Any] = [:]


func getMutablePlistDict() -> [String: Any] {
    let fileManager = FileManager.default

    if fileManager.fileExists(atPath: destPath!) {
        if let dict = NSDictionary(contentsOfFile: destPath!) as? [String: Any] {
            return dict
        }
    } else {
        return [:]
    }
}

if let plist = PlistHandler(name: "MovieData") {
        let getPlist = plist.getMutablePlistDict()

        // Load the movie items into the table view data source
        for i in 0..<getPlist.count {
            if let movieItemsCheck = getPlist["Item\(i)"] as? [String: Any] {
                movieItems = movieItemsCheck
                if let newName = movieItems["Name"] as? String, let newRemark = movieItems["Remark"] as? String, newName != "" {
                    movies.append(Movie(name: newName, remark: newRemark))
                }
            }
        }
    } else {
        print("Unable to get Plist")
    }