NSUserDefaults in swift for saving Array of String for TableView

Question

Hi I have a tableview and this is my code in MyItemTableViewController Class

var itemList = [String]()

@IBAction func saveItemToList (segue: UIStoryboardSegue) {
    let AddNewItemViewController = segue.sourceViewController as! addItemTableViewController

    let name = AddNewItemViewController.itemName

    if name == "" {

    }
    else {
        itemList.append(name!)

        let indexToInsert = itemList.count == 0 ? 0 : itemList.count - 1

        let indexPath = NSIndexPath(forRow: indexToInsert, inSection: 0)

        tableView.insertRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
    }

}

How can I save my array using NSUserDefaults I was trying some ways but it didn't work for me.

Nirav D · Accepted Answer · 2016-08-28 04:05:11Z

2

You can set itemList Array like this way.

let defaults = NSUserDefaults.standardUserDefaults()
defaults.setObject(itemList, forKey: "items")
defaults.synchronize()

When you need to extract from NSUserDefaults you can extract it like this

let defaults = NSUserDefaults.standardUserDefaults()
if let items = defaults.objectForKey("items") as? [String] {
    print(items)
}

Or you can also use stringArrayForKey.

if let items = defaults.stringArrayForKey("items") {
    print(items)
}

For more detail about NSUserDefaults read this tutorial

Edit: The problem is you are trying to add [String] object inside Sting array, that not possible, if you want to merge two array then write like this.

if let items = defaults.stringArrayForKey("items") {
    self.itemList = self.itemList + items
}

edited Aug 28, 2016 at 4:05

answered Aug 27, 2016 at 13:53

Nirav D

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8 Comments

Faisal Over a year ago

Im trying to append items to itemList but it said Cannot convert value of type '[String]?' to expected argument type 'String' i don't no what i should do

Faisal Over a year ago

i have another quotation if you don't mind , if i clicked on particular cell , i need the title of that cell be the header of the second view controller

Nirav D Over a year ago

Welcome mate, Happy coding :)

Nirav D Over a year ago

Can you add the new Post with you navigation code that will help me to understand what you have try.

Nirav D Over a year ago

Don't understand what you want, also there is no code of navigation, It is batter if you add new post.

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