Swift : missing argument label 'xxx' in call

Question

func say(name:String, msg:String) {
    println(\"\\(name) say \\(msg)\")
}

say(\"Henry\",\"Hi,Swift\")  <---- error because missing argument label \'msg\' in ca         


        

Answer 1

Swift 3.0 update:

In swift 3.0, methods with one param name per inputs are required to have that param name as part of the function call. So if you define the function like this

func say(name:String, msg:String) {
    print("\(name) say \(msg)")
}

Your function call will have to be like this

self.say(name: "Henry",msg: "Hi,Swift")

If you want to have English like readable function labels but do not want to change input param name, you can add the label in front of the parameter names, like this

func say(somethingBy name:String, whoIsActuallySaying msg:String) {
    print("\(name) say \(msg)")
}

Then calling it like this

self.say(somethingBy: "Henry",whoIsActuallySaying: "Hi,Swift")