Swift NSArray下标AnyObject类型的值

Question

This my my NSArray

var RidesData:NSArray = []

It is used to store an JSON Array i have converted

RidesData = NSJSONSerialization.JSONObjectWithData(jsonData, options: nil, error: &error) as! NSArray

Sample of the Array

Optional((
    {
    ContentType = USSShow;
    Name = "Lake Hollywood Spectacular\U00ae (Seasonal Show)";
    NextShowTime = "8:00pm";
    NextTimeSlot = "";
    QueueTime = "";
    TimeSlot = "";
},

I am trying to get the Name value using this code

let RideName = RidesData[indexPath.section]["Data"][indexPath.row]["Name"]
cell.textLabel!.text = RideName

However i am getting this error

Cannot subscript a value of type 'AnyObject?!' with an index type of 'int'

From what i have searched, i believe that i am unable to subscript because it is an optional but when i tried to unwrap it with ! it gives me this error

Operand of postfix "!" should have optional type; type is 'NSArray'

How can i solve this problem?

Answer 1

Try:

let RideName = RidesData[indexPath.section]["Data"]??[indexPath.row]?["Name"] as? String

Since RidesData[indexPath.section]["Data"] is AnyObject?! you have to unwrap it twice .

Why AnyObject?! ? Because RidesData[indexPath.section] is AnyObject , and AnyObject may or may not have subscript . So, the first ? means, "If it has subscript ", and the second means "If subscript returns non nil ".

Answer 2

Replace this line

let RideName = RidesData[indexPath.section]["Data"][indexPath.row]["Name"]

with this

let RideName = RidesData[indexPath.section]["Data"][indexPath.row]["Name"] as! String

Answer 3

The problem is with the cast , the array RidesData is an optional array: [AnyObject]?.

So you must write it like this:-

let RideName = RidesData[indexPath.section]["Data"][indexPath.row]["Name"] as! String

Answer 4

RidesData[indexPath.section]["Data"] is of type AnyObject?! and then you try to access the indexPath.row element. You need to first unwrap this part.

Try this:

let RideName = RidesData[indexPath.section]["Data"]?[indexPath.row]["Name"]