将元素添加到空字典，然后添加到数组

Question

I have two string elements. I want to add them to a dictionary and then finally, add the dictionary to an array. I tried doing it like so..But it's not working...

I made a dictionary like so..

var receiverDict = Dictionary<String, Any>()

The 2 strings that I have are these..

self.abc_Receiver1 = "test1" &

self.abc_Receiver2 = "test2"

I tried to add it to the dictionary like so...

(self.receiverDict["name"]! as AnyObject).add(self.Smat_Receiver1) //HERE IT CRASHES
(self.receiverDict["id"]! as AnyObject).add(self.receiverId1) 

But it crashes in the first line above.

Further, I had also made an array like so to add the above dictionary to this arraylike this...

var arrayOfReceiverNames = [[String: Any]]()

arrayOfReceiverNames.append(self.receiverDict)

But the crash is occuring while adding elements to the dictionary itself.

Answer 1

Please, this is Swift. Your dictionary is clearly [String:String]

var receiverDict = Dictionary<String, String>()

Then use native Swift terminology without bridging to the Objective-C runtime and add is wrong anyway.

receiverDict["name"] = self.Smat_Receiver1
receiverDict["id"] = self.receiverId1

Or simpler in one line

let receiverDict = ["name" : self.Smat_Receiver1, "id" : self.receiverId1] 

Declare the array also more specific

var arrayOfReceiverNames = [[String: String]]()
arrayOfReceiverNames.append(receiverDict)

Answer 2

You can achieve it by doing:

var dict = [String:Any]()
var arrayOfDict = Array<[String:Any]>()

dict["name"] = someValue

arrayOfDict.append(dict)

Hope it helps.

Answer 3

If you already know the strings and the values, why not directly add them like below:

var arrayOfDict : [Dictionary<String,String>] = [["name1":"value1"], ["name2":"value2"]]

If you have them stored in a variable, just replace the string with your variable.

So in your case,

 self.abc_Receiver1 = "test1"
 self.abc_Receiver2 = "test2"
 var arrayOfReceiverNames : [Dictionary<String,String>] = [["id":self.receiverId1], ["name":self.Smat_Receiver1]]

Answer 4

If you've values set for both Smat_Receiver1 and abc_Receiver2 before creating the Dictionary , then you can simply use a one liner to create your Dictionary , ie

let receiverDict = ["name": self.Smat_Receiver1, "id": self.abc_Receiver2]

The type of receiverDict will be inferred automatically as [String:String] .

Now, create the array with receiverDict as,

var arrayOfReceiverNames = [[String:String]]()
arrayOfReceiverNames.append(receiverDict)