无法将 'Swift._SwiftDeferredNSDictionary<Swift.String, Swift.String>' 类型的值转换为 'NSMutableDictionary'

Question

我有一个用 Swift 3.0 编写的应用程序，我声明了以下数据类型：

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

我有以下加载 plist 内容的方法：

// 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")
    }

它从另一个 class:

调用一个名为 getMutablePlistDict() 的方法

// 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
    }
}

当我运行应用程序时，出现上述错误（参见问题标题）。但这是新的。在 Xcode 8 我没有得到这个错误。这是什么原因以及我必须如何更改我的代码才能避免这种情况？

Answer 1

你可以这样使用：

已将 NSMutableDictionary 更改为 [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")
    }

无法将 'Swift._SwiftDeferredNSDictionary<Swift.String, Swift.String>' 类型的值转换为 'NSMutableDictionary'

Could not cast value of type 'Swift._SwiftDeferredNSDictionary<Swift.String, Swift.String>' to 'NSMutableDictionary'

nsdictionary

ios

swift3