Clever Geek Handbook

Passing an unknown number of arguments to functions

In my current project, I had to implement several functions to handle varying amounts UITextField

across multiple screens of my application.

I think it would be more efficient if I could implement one function that can take any number UITextField

.

Is it possible to implement this twilight function on the swift 3?

+3


source to share


3 answers


Swift Variadic Parameters

provides you with these capabilities. Write variable parameters by inserting three period characters (...)

after the parameter type name. Here I give you a demo:

func anyNumberOfTextField(_ textField: UITextField...) {

}

Call the function as follows. Now you can pass any number of text fields. I passed three parameters here:



anyNumberField(UITextField(),UITextField(), UITextField(), UITextField())

Note. A function can have at most one variation parameter.

See Swift Functions for details

+8


source


The easiest way is to pass an array of UITextFields:



func processTextFields(fields:[UITextField]) {
    for field in fields {
        // Process your text fields
    }
}
+5


source


I think you can do this by creating a function that takes a UITextField array as an argument.

func handle(textFields: [UITextField]) {
    // do your things here by accessing each textFields like : textFields[0]
}

Otherwise, you will just create multiple arguments that are equal to the number of text boxes you have to do something to. Hope this helps :)

0


source






More articles:


All Articles