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iOS

Posted by Antonija Pek
Antonija Pek
5,819 Points

Simple To Do App in Swift 2 and Xcode 7

Hi,

I am practicing my Swift and I hit a bump. I am making simple to do app, and it works but I want to upgrade it with persistence with NSUserDefaults

So here is my code which need refactoring... I know...

import UIKit

var listItems = [String]()

class SecondViewController: UIViewController {

    @IBOutlet weak var userInput: UITextField!

    @IBAction func addItem() {
        if userInput.text?.characters.count > 0 {
            listItems.append(userInput.text!)
            userInput.text = ""
            self.view.endEditing(true)
            print(listItems)
        }

    }    

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

How to add this functionality, I really don't understand.

One more thing. This part is bad. How to make optional binding with UITextField object?

@IBAction func addItem() {
        if userInput.text?.characters.count > 0 {
            listItems.append(userInput.text!)
            userInput.text = ""
            self.view.endEditing(true)
            print(listItems)
        }

    }

2 Answers

Jari Koopman
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Jari Koopman
Python Web Development Techdegree Graduate 29,349 Points
Jari Koopman
.a{fill-rule:evenodd;}techdegree seal-36
Jari Koopman
Python Web Development Techdegree Graduate 29,349 Points

Hi Antonija,

I can't help you with refactoring your code. But creating an NSUserdefault can be done by the following code:

let defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()

To add an object: 

defaults.setObject(objectName, forKey: "key")

To reach the object:

print(defaults.dataForKey("key"))

I hope you can go on with your project!

Antonija Pek
Antonija Pek
5,819 Points
Antonija Pek
Antonija Pek
5,819 Points

Thanks, I somehow managed to do this alone.