How to check if the Dictionary contains a key iOS swift?

Problem:
You had dictionary and it contains some set of keys.But you want to check the key exists before get the value.

Solution:

The function will return if key already there then true otherwise returns false


    func getIfKeyExists(dict:NSDictionary,key:String) ->Bool {
        if dict[key] == nil {
            return false
        } else {
            return true
        }
    }