Print appended struct (swift4)

Question

I have three textifleds that I am using to append data into a struct. How can I print what I appended? Right now I am getting a error message.

import UIKit

cla         


        

Answer 1

You are trying to print the actual struct of Person. You want to print a specific instance.

You can print the whole array as:

print("contacts: \(contacts)")

If you want to print the one instance, I would suggest splitting your code a little:

@IBAction func press(_ sender: Any) {
    let person = Person(name: a.text!, surname: b.text!  , phone: Int(c.text!)!)
    print(person)
    contacts.append(person)
}

But to make the printing useful you should add the description property to your struct and make your struct conform to CustomStringConvertible.

struct Person: CustomStringConvertible {
    var name: String
    var surname: String
    var phone: Int

    var description: String {
        return "Person name: \(name), surname: \(surname), phone: \(phone)"
    }
}

You should also learn to safely deal with optionals. The ! operator means "crash if not nil". Your code will crash if the user types in "Hello" into the phone field.

@IBAction func press(_ sender: Any) {
    if let name = a.text, let surname = b.text, let phoneStr = c.text, let phone = Int(phoneStr) {
        let person = Person(name: name, surname: surname, phone: phone)
        print(person)
        contacts.append(person)
    }
}

And also consider that a phone number is not a numeric value. Use String, not Int to store phone numbers.