how to change class properties into dictionary in swift code example

Example 1: swift retrieve value from dictionary

var companies = ["AAPL" : "Apple Inc", "GOOG" : "Google Inc", "AMZN" : "Amazon.com, Inc", "FB" : "Facebook Inc"]

for (key, value) in companies {
    print("\(key) -> \(value)")
}

//Or if you only want the values:

for value in Array(companies.values) {
    print("\(value)")
}
// One value with direct access on the dictionary:

print(companies["AAPL"])

Example 2: create dictionary swift

var someDict:[String:Int] = ["One":1, "Two":2, "Three":3] // creates dictionary
var someVar = someDict["One"] // accesses the value of key "One"

print("The value of key = One is \(someVar)")