Lesson 9 - iOS ToDo app in Swift - Filling in and serialization

Swift iOS iOS ToDo app in Swift - Filling in and serialization

In the previous lesson, Creating an iOS ToDo app storing data, we started building a ToDo app.

For today's iOS tutorial, I promised to finish marking tasks as completed and saving data.

Marking tasks as completed

Let's program marking tasks as completed first. We've already prepared a method which is called when the user selects a TableView row. We'll use the accessoryType cell property and set it to .checkmark or .none when the row is selected:

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    if let selectedCell = tableView.cellForRow(at: indexPath) {
        if selectedCell.accessoryType == .checkmark {
            selectedCell.accessoryType = .none
        } else {
            selectedCell.accessoryType = .checkmark
        }
    }
}

If we now select a row, it'll be marked as completed or uncompleted. That's because we set the accessoryType to .none if it's already set to .checkmark.

Bug hunt

It looks like we're done. However, there's a very essential error


 

...End of the preview...

Premium article

Premium article

ict.social is a large database made up of manuals and tutorials, whose main goal is to provide high-quality IT education to everyone. We started out in the Czech republic, where we display roughly a million articles per month and receive plenty of gratitude from our users. Thanks to our successful establishment, we are now bringing these articles to the rest of the world.

Although we are trying to keep our content free of charge, maintaining the site is a huge effort for everyone involved. Therefore, some content (exercises and more advanced material) costs network points. Don't worry, they're really cheap :)

Article description

Requested article covers this content:

In this Swift tutorial, we'll fill our ToDo app with tasks and have a look at serialization/deserialization of data into/from a file.

Limited offer: Learn all knowledge and save money

Buy articles and tests separately one by one 100 points
Buy all currently available articles in the section including all features for an exclusive price 85 points
Currently, you have 0 points
By buying this exclusive package, you'll have access to all 16 articles in this course including exercise submitting while saving $1.35. This offer is limited for the first articles only with an additional exclusive 15% discount.
You gain 85 points for adding an article to the site, or for $9.00 $7.65

Warning, by buying just this article you'll lose the limited 15% discount for the package of all the articles.

To access the article, you need 10 points
Currently, you have 0 points
You gain 10 points for adding an article to the site, or for $0.90

Before buying this article, you have to buy the previous one

Buying this article gives you unlimited access to it forever. You will learn some more and help us keep giving our site maintenance which helps you and others get better futures. It's a win-win.

This article is licensed: Premium, by buying this article, you agree with the terms of use.

You gain points by supporting our network. This is done by sending a helpful amount of money to support the site, or by creating content for the network.

You can get points immediately using:

Credit card SMS Wire transfer
Credit card SMS Wire transfer
Article has been written for you by Filip Němeček
Avatar
Activities (5)