Could not cast value of type '__NSArrayI' (0x10df73c08) to 'NSDictionary' (0x10df74108)

问题

    let url = "http://xyz/index_main.php?c=webservices&a=get&e=007"

    Alamofire.request(url, method: .post, parameters: nil, encoding: JSONEncoding.default)
        .responseJSON { response in
            print(response)
            //to get status code
            if let status = response.response?.statusCode {
                switch(status){
                case 201:
                    print("example success")
                default:
                    print("error with response status: \(status)")
                }
            }
            //to get JSON return value
            if let result = response.result.value {
                let JSON = result as! NSDictionary
                print(JSON)
            }

Result :

    {
    "create_by" = 007;
    "create_date" = "2016/06/20";
    "due_date" = "2016/06/22";
    "estimate_time" = "";
    fixer = 007;
    priority = High;
    "project_code" = testing;
    status = "Re-Open";
    "task_id" = 228;
    "task_title" = test;
    tester = 007;
},
    {
    "create_by" = 006;
    "create_date" = "2016/06/23";
    "due_date" = "2016/06/24";
    "estimate_time" = "";
    fixer = 007;
    priority = Critical;
    "project_code" = "tanteida.c";
    status = "In Progress";
    "task_id" = 234;
    "task_title" = testing;
    tester = 006;
}

I want to convert to NSDictionary and get different Array like task_id(array) but I get this error:

"Could not cast value of type '__NSArrayI' to NSDictionary"

Please Help me

Thank you in advance

回答1:

Your response is of Array of Dictionary not Dictionary, so if you want all the dictionary you can access it using loop.

if let array = response.result.value as? [[String: Any]] {
    //If you want array of task id you can try like
    let taskArray = array.flatMap { $0["task_id"] as? String }
    print(taskArray)
}

回答2:

That's because you service returns results in form of an array. What you need to do is to cast result to NSArray. Then you can access separate results by index:

let JSON = result as! NSArray
let firstResult = results[0]

回答3:

Swift 4.1 +

if let resultArray = jsonResponse.result.value as? [[String: Any]] {
    let taskArray = resultArray.compactMap { $0["task_id"] as? String }
}

来源：https://stackoverflow.com/questions/40461888/could-not-cast-value-of-type-nsarrayi-0x10df73c08-to-nsdictionary-0x10d

标签

ios

arrays

json

swift3

alamofire