Asynchronous Image Loading Ios Table View Swift

Use Xamarin. Populating images to table view swift iOS8. In both cases the image will load fine but when I'll scroll the table the images will change a few times until the scroll will end and the image will go back to the right image. NOTE: The technique above, initializing a UIImage using its name, still works too. But when i want a second static Table cell segue to a second PlacesTableView(Controller), i thought i duplicate the Data. 100 Days of Swif t. Click on the Table View Cell at the left side bar. Table Views in iOS Apps Jussi Pohjolainen Table Views in iOS Apps Jussi Pohjolainen. detailLabel. View Sudheer K A’S profile on LinkedIn, the world's largest professional community. So there is a HUGE benefit to ALSO go through the iOS 9 course - or you'll miss out on awesome content. How to display parse. Here is a skimmed down version of my code (all is present for you to test). Learn how to install and configure the SDK. This section completely updated to reflect changes in Xcode 6. Here is how you can save an image asynchronously in Swift:. This one-stop resource is vastly more accessible than Apple docs and will help you get more nuanced insight into Swift 3. Swift: Loading Images Asynchronously and storing with NSCache and NSURLCache - Duration: 20:53. It is best to specify images whose dimensions match the dimensions of the image view exactly, but image views can scale your images to fit all or some of the available space. Collection and Table View Asynchronous data loading. It is provided under the same Creative Commons licensing as the rest of CS193p’s course materials. The Photo Library will close and the Product Classification Table View Controller will open up and start the classification process as well as the fetching of the products. If you have any questions please ask, thank you for taking your time to look at this. I have gave both cells an identifier and now am trying to load into each cell there relevant content. It's actual API however, can sometimes be a bit, well, let's call it "dry". I have two prototype cells, both with different layouts. Step 2: On your StoryBoard Place a Table View Controller, on your CELL change the Identifier name as "cell" Step 3:. controller is presented within the bounds of the original table view controller. 11/13/2018 Updated for Xcode 10/Swift 4. I built custom auto-complete logic to lookup our database of 80,000 global users and present real-time suggestions in a table view under the search box while typing. Classy! 🎩. Download the latest release of Realm and extract the zip. Measuring iOS Animation Performance. In this post I'll demonstrate how iOS 8 solves all of your dynamic table view cell sizing needs. Even though you don't need to use the NSFetchedResultsController class to populate a table view, I find myself using it quite a bit in Core Data applications. The UISearchBar class implements a text field control for text-based searches. Designing Chat Applications for iOS Using Swift. This image view has no content right now, so it's filled with a pale blue background and the word UIImageView. Tables[index]. As most iOS developers know, displaying sets of data is a rather common task in building a mobile app. Since the images are loaded asynchronously and the table view cells are re-usable, there is a big chance that your image will be loaded in the wrong cell. If you're building an app for any kind of web service, you've certainly come across the situation where you want to load images for a tableview from the internet, while the user is scrolling. This is part two of a tutorial series covering the usage of Core Data in Swift to write iOS apps with persistence. WWDC is Apple’s annual Worldwide Developers Conference, a great chance for all developers around the world to meet the best engineers from Apple and to get the latest insights about their favorite products and latest technologies. (As per first step) Then at the right side bar, enter the identifier of the cell. If you need to find the size of an aspect fit image inside its image view, I have just the extension for you:. 03 January 2019 Easiest way to display highly customizable in app notification banners in iOS. It is nice when user profile has a photo. table view, and image picker and scroll view. Faster way to load image from an URL to image view in table view cell. (Swift 5, iOS x. It also has a simple loop that first loads data items. I have gave both cells an identifier and now am trying to load into each cell there relevant content. When the asynchronous load finishes you need to check if that cell is still visible by using the CellAt method. How to programmatically fetch the Document directory. When its parent view controller is saved, the table view automatically saves the index paths for the currently selected and visible rows. Material Design Table View Color Label Transitions Tutorials. Yang Liu (Ben) 2 years ago (2017-11-22) Mobile, iOS, Swift, Objective-C. One of the most versatile UI elements which you come across in iOS development is UITableView. In parts 1 through 4 we went over some basics of Swift, and set up a simple example project that creates a Table View and a puts some API results from iTunes inside of them. iOS - Table View - It is used for displaying a vertically scrollable view which consists of a number of cells (generally reusable cells). The simplest approach would be loading all 100 data using URLSession at once in viewDidLoad, then update the table view data source and reload table view after the response is retrieved. Learn how to create and share mobile map packages so that you can take your organization's maps offline and view them in the field with an iOS app. Todays topic is Custom UITableViewCell Tutorial and here we will fetch JSON data from server and then we will display the data to our Custom UITableView. The Collection View is similar to Table View but there is a wonderful change in its user interface. NOTE: The technique above, initializing a UIImage using its name, still works too. Swift, is the newer programming language from apple to build iPhone applications and therefor a lot more authors are writing Swift tutorials. Learn to download, parse, and integrate data from remote web APIs and leverage it in your iOS applications. If you are looking to get started (iOS programming in general or some specific area), here are more relevant links for you:. controller is presented within the bounds of the original table view controller. So I made it my mission this weekend to figure out how to get the images asynchronously. Swift Tutorial: Building an iOS application–Part 2 Jack Watson-Hamblin swift ios Swift developer Rony Rozen walks through Swift's syntax, ways to use Swift and Obj-C together, and the structure of apps built with Apple's new language. Is there any way i can load Image without scrolling the view?. Most projects took a few days to complete. Async/await is by far the best. swift file, connect it to the new Data. This is important since it allows to. Load List of Images From Remote Server Url In this Swift code example we will learn how to programmatically create UICollectionView and load list of images from server side php script. ios uitableview swift asynchronous parse. We will begin with a simple app with 5 PNG images, and a table view. 2 iOS applications often display thumbnail images in table views alongside other text-based content such as contact names or product descriptions. This guide will demonstrate one method for creating a repeating "flip book" or animated gif effect given multiple images. delete the default story board and its ViewController. I have no idea why this is happening. With both a delegate and data source it is powerful, flexible and can get a bit complicated. Starting on iOS 8, Apple released WebKit View as the standard for displaying web content inside an app. Image loading lag in tableview with RSS feed datasource in Swift Tag: swift , dispatch-async I am using dispatch_async to download the images from an rss feed to avoid lagging but when I scroll fast, I can see the images are changing, which is pretty annoying. 04/04/2019; 23 minutes to read +2; In this article. In your storyboard, select the image view in the table view cell. ImageLoader assembly must be referenced to your iOS apps since the image view consumes the image loader services to perform asynchronous. ios,swift,uitableview,cocoa-touch,ios-charts I am working on a project where I have a table view which contains a number of cells with pretty complex content. When I load the code it only loads into prototype cell 1. Tables in iOS use the UITableView class to do so. WhereClause to filter the request features. This set of features exists on server but were updated locally and have not yet been submitted to server. swift in the Project Navigator on the right. If you have any questions please ask, thank you for taking your time to look at this. The Collection View is similar to Table View but there is a wonderful change in its user interface. Load images asynchronously in a UITableView using GCD (Grand Central Dispatch) January 8, 2012 Recently, I needed to create a UITableView with UITableViewCells with the image property of the cells' imageView property set to images retrieved from the web. It provides easy to use API for the developers to to run background tasks by…. The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps. If you’re grounded in the basics of Swift, Xcode, and the Cocoa framework, this book provides a structured explanation of all essential real-world iOS app components. async {if let image = object as? UIImage. Network requests in iOS apps don't happen in a vacuum. With this change, our code is both better and worse. Open a terminal and navigate to your project path:. Keep in mind that this iOS 10 course has a bunch of new apps. swift in the Project Navigator on the right. In this tutorial, we are going to reimplement the. I’ve added a long delay so that the animation doesn’t happen right at the moment we select Example II from the table view. If a table view controller will not work, and you do not want to layout all of your controls on the storyboard, you can generate your UILabels and auto layout constraints. So there is a HUGE benefit to ALSO go through the iOS 9 course - or you'll miss out on awesome content. It is nice when user profile has a photo. com The Parse documentation on this topic is disapointing, and, as I learned only provides some of the information you'll need. Make sure to open the file named CustomInfoWindow. So whether you're building web applications by using. I accidentally dragged the empty table view and suddenly the items appeared. Hey guys, welcome to another post, which is Get Image From URL Swift 3. Loading a massive number of images asynchronously in a scrollable view like UITableView can be a common task. Otherwise you set the image view to be the default image and then you start an asynchronous operation to load it. If you are a beginner, things can break without any apparent reason, and code can become spaghetti-like. You can set queryParameters. Click on the Table View Cell at the left side bar. Thanks @BerayBentesen for the reply!! I already used SDWebImage, but it worked partially since after getting the image with cell. before the image is set into view. From the main. It was created as an improved replacement for SDWebImage, PINRemoteImage and FLAnimatedImage. iOS Unit Testing by Example XCTest Tips and Techniques Using Swift by Jon Reid. Design Patterns on iOS using Swift – Part 2/2. YYWebImage is an asynchronous image loading framework (a component of YYKit). Adding a Refresh Control. Displaying data with the table view component provided in Crosslight is easy, thanks to the MVVM design pattern built to the core of Crosslight. Set the height and width of the Table View as the full screen. But when i want a second static Table cell segue to a second PlacesTableView(Controller), i thought i duplicate the Data. In this article, we will see how we add pull to refresh to the tableview control. This is going to be a very simple storyboard. This tutorial is all about tying a table view to an API call returning an. You accomplish this by adding an Edit button to the table view's navigation bar. The mobile app industry is constantly innovating and growing, and one of the biggest splashes recently is the launch of Apple's iOS 10. viewDidLoad() // Do any additional setup after loading the view. programmatically set an image in the background of a table view cell? (cell) size is 55 and I want it to expand the full length of the window (iPhone). Async is a Swift library by Tobias Due Munk that adds some much-welcomed syntactic sugar to Grand Central Dispatch. Also drop a “Table View Now let’s implement the Table View methods, on the ViewController. In this view controller, the weather data is fetched from the Dark Sky API and displayed in a table view. Right now we have the following Table View in your App. Note: If you are looking for an example on how to upload image to Amazon AWS S3 bucket then I have a different blog post on it. We’ll have to handle table view cells getting reused while we’re trying to retrieve the images. Now, drag its edges so that it fills the entire view controller. Go back to the ViewController. Today we’ll add another feature: Showing images of each species in the table view. The code example below will cover: Make ViewController conform to UITableViewDataSource, so that we can load table items into the table view Make ViewController conform to UITableViewDelegate, so that we can handle events like for example when user taps on a table…. Today we'll add another feature: Showing images of each species in the table view. NET from a single shared codebase. Each day, I tried to build something from what I learned. dequeueReusableCell. See the complete profile on LinkedIn and discover Lina’s connections. 3, as of April 17, 2015 In parts 1 through 6 we went over some basics of Swift, and set up a simple example project that creates a Table View and a puts. The product images should lazy load and appear as well. Make sure to open the file named CustomInfoWindow. Create a table view, table view cell and add an Image view to it. In this section, we are going to add actual implementation of View and ViewModel to display image meta data (tags and pixel sizes) in the table view. It was created as an improved replacement for SDWebImage, PINRemoteImage and FLAnimatedImage. With iOS 9, OS X El Capitan, and watchOS 2, Apple introduced a brand new framework, Contacts. Could you guide me in the right. Lastly, the loadDataAndUpdateUI() method connects the adapter to the recycler view with the list of items to be displayed. Forms exposes a complete cross-platform UI toolkit for. Welcome back to iOS eTutorials. The reason for this is one cell will load males and one cell will load females. Material Design Table View Color Label Transitions High-performance animated GIF support for iOS in Swift. Swift + Add UIToolbar or Done Button on Keyboard; Swift + Open UIDatePicker with ActionSheet; Swift + Save and Load Image From DocumentDirectory Swift + Pick Image From Photo Library Using UIImag Swift + Take pictures and save to camera roll usin Swift + Send E-mail In-App using MFMailComposeView Swift + CLGeocoder to show address. What you will learn: How to use the UIImagePickerController class for fast images browsing. So if you have a table with a thousand rows, of which only 12 are on-screen. Aaron Caines is the founder of Geeky Lemon Development. Grand Central Dispatch is a wonderful way to write asynchronous code in your app. Welcome to Drag and Drop with collection and table view. First off, if we're. Today i am going to give an example about how to transfer the JSON data to IOS by using the Brand new SWIFT language. The first thing that came to mind when I saw Swift was TableViews. Sometimes the standard iOS tab bar just doesn't have the look or functionality you need for your app. If it returns null then the cell is not longer visible (it was scrolled away before the load finished). so all image view are display. To develop iOS apps for the iPhone/iPad using Xcode 10, you'll need a Mac running at least Mac OS X 10. Table views on any mobile platform are the workhorse of any application. Adding a Refresh Control. In both cases the image will load fine but when I'll scroll the table the images will change a few times until the scroll will end and the image will go back to the right image. delete the default story board and its ViewController. try to think about how the memory management for the table view design pattern works - if 3 cells are visible at time (per screen size), - then cell 1 will become cell 4 (as cell 1 scrolls out of view and cell 4 scrolls into view) you need to try to design your photo updates, etc. In the dialog that appears, for Name, type photoImageView. View controllers are fundamental building blocks of your iOS app. NotificationBanner is an extremely customizable and lightweight library that makes the task of displaying in app notification banners and drop down alerts an absolute breeze in iOS. Output of iOS Launch Screen App in Swift. But for a certain projects with unique design, we have to use container view controller. Now we can handle the clicks on our iOS TableView Cells. Control-drag from the image view on your canvas to the code display in the editor on the right, stopping the drag at the line just below the nameLabel property in MealTableViewCell. (Swift 5, iOS x. 2 iOS applications often display thumbnail images in table views alongside other text-based content such as contact names or product descriptions. 2 import UIKit class DetailViewController: UIViewController { @IBOutlet weak var detailLabel: UILabel! override func viewDidLoad { super. One of the challenges every iOS developer faces on regular basis is loading data from the server, while keeping the UI responsive. The 2017 iOS 10 Complete App Builder Bundle: With 250+ Hours of Instruction & An Array of App Templates & Tools, This Is the Best Bundle to Start Your iOS Coding Odyssey. When I load the code it only loads into prototype cell 1. Next, you'll give users the ability to delete a meal from the meal list. Good morning. Update October 2016: Fully updated for Xcode 8 and Swift 3. While internet speed running slow at most time image can't load compare to texts. It also has a simple loop that first loads data items. A light-weight UITextView subclass that automatically grows and shrinks based on the size of user input and can be constrained by maximum and minimum number of lines. You should never have a large number of cells. Loading a massive number of images asynchronously in a scrollable view like UITableView can be a common task. On this section, you'll learn how to download and display images asynchronously from the network. The cool part is it even downloads zip files and looks for images inside the zip files, such as the free game art zip linked on the site!. Lets Build That App 31,443 views. Segue from UITableViewCell Taps in Swift Last updated on September 15, 2019 In many apps that use a UITableView, when a UITableViewCell is tapped, the screen will segue over to another view, such as how choosing a song in the Music app goes to the Now Playing screen, and plays that song, shows the album art, and other metadata about the song. The greatest benefits of using NSFetchedResultsController come when we use it to automatically update a table view when objects are added, updated, or removed from. This course is an enormous compilation of Swift 3 coding solutions, neatly organized in sections for fast reference when you need it. If you’re grounded in the basics of Swift, Xcode, and the Cocoa framework, this book provides a structured explanation of all essential real-world iOS app components. Access granted! Load calendars and refresh table view. this is a Table View full of the names of Image Galleries that, when touched on, opens up an Image Gallery in the Collection View described above,. We are using SDWebImage component to load Images. How To Implement a Sticky View While Table View Scrolls; Like App Store app [Swift 3] [Swift 4] How to make a horizontal paging UIScrollView with Auto Layout in Storyboards How to Programmatically Save and Load UIImage Files in The Document Directory with Swift. This tutorial will walk you through how to setup a SQLite database application and to read text and images from the database into a. iOS 11 is here and so is the most comprehensive solution to learn how to use it to develop apps! There's no prior coding experience required in this course, so you'll launch down a guided path to get up to speed with all the newest iOS coding tools available. My reader have already done some application development with Swift. WWDC is Apple’s annual Worldwide Developers Conference, a great chance for all developers around the world to meet the best engineers from Apple and to get the latest insights about their favorite products and latest technologies. Today we will learn creating a simple Table View in iOS using Swift in Xcode 7. Remember this controller is a UITableViewController subclass, that means it will manage a table view object that you are going to use to show the places and addresses names. But it doesnt seem to work that way. This is a common issue that iOS developers run into and I'll. To query the table, create a QueryParameters object. The iOS SDK provides native support for SQLite through the use of the C programming language. To get started with the iOS Swift Chat SDK, create a new Swift project in Xcode with a “Single View App” using the project name ChatDemo. I accidentally dragged the empty table view and suddenly the items appeared. The new ViewController class also adds some methods to load all of a channel’s messages into the table view and. // DetailViewController. iOS Unit Testing by Example XCTest Tips and Techniques Using Swift by Jon Reid. Note: AnimatedImage supports both image url or image data for animated image format. And by using a cell prototype with constraints and your custom table view cell subclass, everything is laid out correctly, saving you from manually adjusting the. I looked at this question but the solution doesn't allow for my custom header view because it combines the space of the footer and header. To use prototype cells you must be in the Interface Builder and have already placed a table view in your view controller. sai has 5 jobs listed on their profile. The Problem. This will cause the table view to call the “cellForRowAtIndexPath” method on line 37 that many number times (one for each row). Is it fun to create the Hello World app? In this tutorial, we’ll work on something more complex and build a simple app using Table View. Loading images with UIImage At this point we have our original table view controller full of pictures to select, plus a detail view controller in our storyboard. In parts 1 through 5 we went over some basics of Swift, and set up a simple example project that creates a Table View and a puts some API results from iTunes inside of them. Current issues: After the initial load, the Master Table View appears empty until I lightly touch it. So if you have a table with a thousand rows, of which only 12 are on-screen. Things get a little more complex when you place an image inside an image view and make it use aspect fit content mode – the image gets scaled down to fit inside the image view, so that all parts of the image are visible. Open Xcode. This book fully covers Swift 4, Xcode 9, and iOS 11. In this tutorial, you will create an app that uses concurrent operations to provide a responsive interface for users by using Operation and OperationQueue. The last interesting part I’ll mention is the syntax for mark comments which help split up and allow you to jump through files. 4 (223 ratings) Course Ratings are calculated from individual students’ ratings and a variety of other signals, like age of rating and reliability, to ensure that they reflect course quality fairly and accurately. Assign a custom class to the cell we created. (As per the second step in above image) Now consider the below image. Create a table view, table view cell and add an Image view to it. However, I cannot get the tableview to iOS Load Table View after parsing JSON file Swift 2. First off, if we’re. dequeueReusableCell. I have two prototype cells, both with different layouts. Maybe some don't like that it's rather "magical," hiding what's really going on from the programmer, but modern applications often follow a pattern falling exactly in line with what the async/await syntax is made for. com/user/sehehe/ Project files. So thats all for this Swift JSON Tutorial. You can now layout and add objects your prototype cell as you would with any other view. On Line 37, this method expects us to create a table view cell, initialize it with some data, and return it for display. However, these images are not usually delivered with the initial response, but must instead be retrieved separately afterward. And by using a cell prototype with constraints and your custom table view cell subclass, everything is laid out correctly, saving you from manually adjusting the. Async/await is by far the best. An important part of our app is to show images, and we use them on almost every screen. It is nice when user profile has a photo. This sample demonstrates how to show the users in a portal group. List portal group users Sample Viewer View Sample on GitHub. If you need to find the size of an aspect fit image inside its image view, I have just the extension for you:. With that many labels, you probably have many of them that have a similar layout. Otherwise you set the image view to be the default image and then you start an asynchronous operation to load it. From fancy menu to image scroll you must have found it at many places. How To Implement a Sticky View While Table View Scrolls; Like App Store app [Swift 3] [Swift 4] How to make a horizontal paging UIScrollView with Auto Layout in Storyboards How to Programmatically Save and Load UIImage Files in The Document Directory with Swift. Although we will add a UIImageView to the table view cell, only the labels for the meta data are implemented in this blog post. This means if you were to downgrade to a lower version, all your links (at each layer and slide) will be gone. You are not alone with other developers including, Instagram, Twitter, Feedly and even Apple often using more than the basic table view cell. ) The answer is no, unless you're using the Javascript interpreter provided by Apple. Also drop a “Table View Now let’s implement the Table View methods, on the ViewController. So I made it my mission this weekend to figure out how to get the images asynchronously. Create an ArcGISMapImageLayer with the URL of a map image service. Reload the data in Table view. If you're starting a new project, chances are that you'll decide to write it in Swift. How it works. Luckily with the release of iOS 8 Apple has finally given us what we deserved from UITableView. In the cell for row at method write the following lines of code. it becomes easier to create because by default iOS gives you the bouncy backs to table views and scroll views. NotificationBanner is an extremely customizable and lightweight library that makes the task of displaying in app notification banners and drop down alerts an absolute breeze in iOS. The first thing that came to mind when I saw Swift was TableViews. Loading image from either URLSession-based networking or local provided data. 100 Days of Swif t. Getting Started With UITableView in Swift. Alert dialog is a simple view that pops up in the app to show some alerts to user. Most projects took a few days to complete. Could you guide me in the right. Swift: YouTube - How to Load Images Async in UICollectionView Swift Tutorial for iOS:. Thanks @BerayBentesen for the reply!! I already used SDWebImage, but it worked partially since after getting the image with cell. This is how we can use ios launch screen in swift applications to show launch screen while starting of the app based on our requirements. In this video, I show you how to create a tableview in Xcode 8, using Swift 3. How To Implement a Sticky View While Table View Scrolls; Like App Store app [Swift 3] [Swift 4] How to make a horizontal paging UIScrollView with Auto Layout in Storyboards How to Programmatically Save and Load UIImage Files in The Document Directory with Swift. This allows the user to scroll past the first page, even though you still haven't received any of those moderators. The Swift version is simply called PagedArray and can be found on GitHub. In this case, you need to create a custom tab bar from scratch. How to async load images on dynamic UITableView? that I must use async image loading in my tableView, but don't I load them async already? for table view's. To get the infinite scrolling working in your user interface, you first need to tell the table view that the number of cells in the table is the total number of moderators, not the number of moderators you have loaded. Starting on iOS 8, Apple released WebKit View as the standard for displaying web content inside an app. You can do a lot of things when using iOS built-in views. I have no idea why this is happening. It also has some developer-oriented documentation for Mozilla products, such as Firefox Developer Tools. In the last tutorial we learnt about taking user input using Text Field. The link structure was completely changed in this version. It is nice when user profile has a photo. Touching one will segue me to a bigger view in the DetailViewController. In the cell for row at method write the following lines of code. The UIImage imageWithData: method is NOT asynchronous, so as the table view loads each new cell, it has to go out to the image url and download the data, locking up the app while doing so. Includes the TL;DR Edition and Adding More API Calls Reference Sheet. Can't believe this wasn't made standard long ago. Here is a skimmed down version of my code (all is present for you to test). Swift Tutorial This tutorial updated to reflect changes in Xcode 8. Who This Book Is For. The link structure was completely changed in this version. try to think about how the memory management for the table view design pattern works - if 3 cells are visible at time (per screen size), - then cell 1 will become cell 4 (as cell 1 scrolls out of view and cell 4 scrolls into view) you need to try to design your photo updates, etc. Define your image view. This is important since it allows to. With the very first table view I implemented in iOS, I was using tableView. But it doesnt seem to work that way. swift // XCode 8. In this tutorial I'll explain you how to fill an iOS UITableView component by loading the data directly from an URL using the JSON format. There are two ways: 1. This library provides an async image downloader with cache support. First off, if we’re. Swift + Save and Load Image From DocumentDirectory Swift + Pick Image From Photo Library Using UIImag Swift + Take pictures and save to camera roll usin Swift + Send E-mail In-App using MFMailComposeView Swift + CLGeocoder to show address string on Map; Swift + CLGeocoder to get address from current loc. To make the transition easier for you and save you the time you would spend writing certain components for your app, here are 10 libraries that we think every iOS developer should know about!. In the default Tab Bar, implementation all icons are tinted to your app’s main color, which is the default color iOS blue. How to ,download an image from a link, and display it in the cell view table How to, define and use a detail view to display the select item detail from the list How to, store images in the phone. For all the things that your views fall short, there is always the web. Async image loading in tableView using Parse. With this change, our code is both better and worse. It also has a simple loop that first loads data items. com) Learn Swift for Beginners (2018) (youtube. Use a table data source. How to display parse. How to programmatically fetch the Document directory. With that, you enjoy not only basic asynchronous image updating, but also image caching, prioritization of visible images because we're reusing dequeued cell, it's more efficient, etc.

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