![]() ![]() Button3 applies the Move-Up-Fade animation to the TableViewCells.Button2 applies the Move-Up animation to the TableViewCell.Button1 applies the Fade-In animation to the TableViewCells.Now, based on the tags assigned to the button, the switch case helps to set that particular button’s symbol as filled, and likewise, the currentTableAnimation variable is also set accordingly. Since we only want a single button to appear as selected at a time, we first assign all the buttons with a circle symbol, removing the fill from the previously selected button. Note - All the four buttons should be assigned to a single outlet function, in this tutorial, I’ve assigned it to the animationButtonPressed function. Only when I read some brilliant blogs, books on UI / UX and realized the power of animations, and I convinced myself and just started trying out animations.Īlright, we will be adding four types of animations, here’s how the animation of the TableView cells will look. I was reluctant to try UIView animations before, I gave excuses to myself, that it was too hard, it wasn’t needed, it would take a lot of time to learn. During an animation, user interactions are temporarily disabled for the views being animated. Here’s a description of the animated method -Īnimate changes to one or more views using the specified duration. ![]() We will be animating the table view cells with the help of UIView.animate method of the UIView class. It’s used to display a single column of vertically scrolling content, divided into rows.Īdding animations is a great way to engage the user, and at the same time, it makes your app look smooth and fluid. Guard let documentDirectory = documentPaths.Table views undoubtedly are one of the most used components in any iOS app. NSSearchPathDomainMask.UserDomainMask, true) (NSSearchPathDirectory.DocumentDirectory, Listing 1: InitializeDatabase function to setup the database func application(application: UIApplication,ĭidFinishLaunchingWithOptions launchOptions: Listing 1 shows the implementation of the initializeDatabase function. By moving the initializeDatabase call inside the didFinishLaunchingWithOptions, you've made sure that initializeDatabase is called only once during the lifecycle of the application. You're going to move the initializeDatabase function into AppDelegate where it can be called from within the didFinishLaunchingWithOptions event. Because this procedure needs to be performed only once for each app, there's no need to call it from the viewDidLoad event. The initializeDatabase function is responsible for copying the database from the application bundle to the documents directory of the application. Inside the viewDidLoad event, you trigger the initializeDatabase function. The viewDidLoad event is invoked each time the app runs. The best place to start is the viewDidLoad event of the TasksTableViewController. The concepts and techniques learned in this article can be applied to any iOS application regardless of the data access layer used. You'll take the whole application apart and create reusable, single-responsibility components that protect the application for future changes. ![]() You'll quickly realize that the implemented code is not reusable and is hard to maintain. In the first section, you'll inspect the TasksTableViewController implementation, which orchestrates the complete flow of the application. The screenshots of the app running in action is shown in Figure 1 and Figure 2.įigure 2: Entering new tasks in the TODO app All of the tasks are persisted in the SQLITE database using the FMDB wrapper. The user can mark the tasks as complete by selecting the cell using a single tap gesture. Users can delete the tasks by swiping right to left on the row and then pressing the delete button. The application consists of a single screen where the user can add tasks to a list. The iOS application under discussion is a simple user task-management app. By isolating each component to perform a single task, you make sure that the code remains lean and easy to maintain. This means that every component of the application should have a single job and purpose. ![]() The basic principle behind lean controllers is the single responsibility principle. I'll start with an app that consists of a massive controller and work my way toward a leaner implementation. In this article, you will learn how to tame these monsters. These bloated controllers are responsible for creating technical debt and also create maintenance nightmares for the future. Unfortunately, most of the time, this distribution ends up with a lot of code in the controllers of the application. Every iOS application uses the MVC pattern to distribute the responsibilities of the application flow. The Model View Controller (MVC) design pattern is no stranger to iOS developers. ![]()
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