Swift: sort [String: String]() by key

Question

I use below code:

var names = [String: String]()
names["1"] = "test"
names["3"] = "new"
names["2"] = "myname"
names["4"] = "yourname"

I print and get below result :

["1": "test", "3": "new", "2": "myname", "4": "yourname"]

I want sort names by key and use this code :

names.sorted(by: { $0.key.first! < $1.key.first! }

But my result is :

[(key: "1", value: "test"), (key: "2", value: "myname"), (key: "3", value: "new"), (key: "4", value: "yourname")]

I want remove key: and value: and show like below :

["1": "test", "2": "myname", "3": "new", "4": "yourname"]