无法将类型 [NSObject : AnyObject] 转换为字符串

Question

I have this code in Swift using Xcode 7.2 ..

func silentPostData(serverName: String, serverport serverPort: String, serverurl serverURL: String, parameters: [NSObject : AnyObject], urldata urlData: NSData) {
    let persist = Persistence()
    var finalURl = "https://\(serverName):\(serverPort)/\(serverURL)"
    for key : String in parameters  {
        finalURL = finalURL.stringByAppendingString(key)
        finalURL = finalURL.stringByAppendingString("=")
       finalURL = finalURL.stringByAppendingString((parameters[key] as! String))
        finalURL = finalURL.stringByAppendingString("&")
    }
}

I get an error(mentioned as the title) in the line "for key : String in parameters {" . Based on the previous answer '(NSObject, AnyObject)' is not convertible to 'String' , i tried casting it to NSString , but it didn't work.So Anyone knows how to convert [NSObject:AnyObject] to string ? Thank You in advance.

Answer 1

Like the comments said, it's a dictionary and you could get the strings by doing this:

parameters.keys.flatMap { $0 as? String }.forEach {
    finalURL = finalURL.stringByAppendingString($0)
    finalURL = finalURL.stringByAppendingString("=")
    finalURL = finalURL.stringByAppendingString(parameters[$0] as? String ?? "")
    finalURL = finalURL.stringByAppendingString("&")
}