Swift Passing array of dictionary to NSMutableArray

Question

I am trying to pass swift array of dictionaries to the NSMutableArray. But I am getting error "Cannot convert value of type [[String : Anyobject?]] to expected argument type NSMutableArray". Below is the code:

   var ary : [[String:AnyObject?]] = []
   var mutableDictionary = [String: AnyObject?]()

   for c in buffer {
       mutableDictionary.updateValue(c.Name, forKey: "name")
       mutableDictionary.updateValue(c.Number, forKey: "phoneNumber")
       mutableDictionary.updateValue(c.id, forKey: "id")
       ary.append(mutableDictionary)
   }

Now passing this "ary" to the Objective C method as a NSMutableArray!

Manager.sharedInstance().List(ary)

Try Manager.sharedInstance().List(ary as! NSMutableArray). — Avi
– Avi, Commented Sep 7, 2016 at 6:15
No it crashes with this as casting from [[string : anyobject?]] to nsmutablearray always fails — Hitesh
– Hitesh, Commented Sep 7, 2016 at 6:29
NSMutableDictionary can't contain optionals, and neither can NSMutableArray. You have to drop the optional on AnyObject. — Avi
– Avi, Commented Sep 7, 2016 at 6:36

Bista · Accepted Answer · 2016-09-07 06:39:59Z

5

Replica of your issue:

    var ary : [[String:AnyObject]] = []
    var mutableDictionary = [String: AnyObject]()
    var mutableArray:NSMutableArray!

    for _ in 0...4 {
        mutableDictionary.updateValue("adsf", forKey: "name")
        mutableDictionary.updateValue("dsf", forKey: "phoneNumber")
        mutableDictionary.updateValue("sdfd", forKey: "id")
        ary.append(mutableDictionary)
    }

    mutableArray =  NSMutableArray(array: ary)

Removing the optional did the trick!

answered Sep 7, 2016 at 6:39

Bista

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2 Comments

Hitesh Over a year ago

Thanks alot! worked but what problem does it cause with optional? anyidea

Bista Over a year ago

The only explanation I have is that: "NSMutableArray doesn't hold optionals". I hope someone with better and deep explanation will come and explain us here.

Satyanarayana · Accepted Answer · 2016-09-07 06:29:05Z

1

// try like this

Manager.sharedInstance().List(NSMutableArray(array: ary as! NSArray))

answered Sep 7, 2016 at 6:29

Satyanarayana

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3 Comments

Hitesh Over a year ago

No it crashes with this as casting from [[string : anyobject?]] to nsmutablearray always fails

Satyanarayana Over a year ago

do one thing instead of this statement (var ary : [[String:AnyObject?]] = []) you can take like this var ary: [AnyObject] = []

Satyanarayana Over a year ago

and try above solution

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