（键：AnyObject，值：AnyObject）不能转换为&#39;Dictionary <String, AnyObject>

Question

I have a .json file that I am serializing into a Swift dictionary.

typealias Dict = Dictionary<String,AnyObject>
       func loadDictionaryFromJSON(filePath:String) -> Dict
    {
        var JSONData:NSData! = NSData.dataWithContentsOfMappedFile(filePath) as NSData
        var JSONError:NSError?
        let swiftObject:AnyObject = NSJSONSerialization.JSONObjectWithData(JSONData, options: NSJSONReadingOptions.AllowFragments, error: &JSONError)!
        if let nsDictionaryObject = swiftObject as? NSDictionary
        {
            if let dictionaryObject = nsDictionaryObject as Dictionary?
            {
                return dictionaryObject as Dict
            }else
            {
                println("Error could not make dictionary from NSDictionary in \(self)")
            }
        }else
        {
            "Error could not make NSDictionary in \(self)"
        }

        println("Empty dictionary passed, fix it!")
        return Dict()
    }

However, I am having trouble getting the objects this now. My .json is basically a dictionary of dictionaries (with various levels of nesting). So to start I am grabbing each object in the top level (which are all dictionaries).

for object in objects
        {
            var dict:Dictionary<String,AnyObject> = object
        }

However, the above line throws the error

(key: AnyObject, value: AnyObject)' is not convertible to 'Dictionary<String, AnyObject>

How can I properly cast each object in my Dictionary to a Dictionary <String,AnyObject> ?

Answer 1

Angled brackets are archaic Swift AFAICT (except in protocols?) Why do you need the type alias? And if you create it, why are you not using it in your loop?

Can you drop the alias and the angled brackets and use the [:] format everywhere and see what happens?

For example, does the following work better?

for o in objects {
    var dict = o as [String : AnyObject]
}

If objects is already typed you could just call it dictionary and do:

for dict in dictionaries {
    continue
}

Answer 2

for (key,value) in objects
        {
            var object:Dict = value as Dict
        }

It turns out it was giving me a tuple and I needed to cast the value as a Dictionary.

See '(key: AnyObject, value: AnyObject)' does not have a member named 'subscript' for more info.