- #SWIFT SHARE ARRAY BETWEEN THREADS HOW TO#
- #SWIFT SHARE ARRAY BETWEEN THREADS UPDATE#
- #SWIFT SHARE ARRAY BETWEEN THREADS CODE#
- #SWIFT SHARE ARRAY BETWEEN THREADS DOWNLOAD#
#SWIFT SHARE ARRAY BETWEEN THREADS CODE#
I hope that this post adds some value to that series by presenting some additional examples, especially viewed from the perspective of someone trying to use shared Kotlin multiplatform code in an iOS app. Note - the excellent Practical Kotlin Native Concurrency series from Kevin goes through a lot of these concepts in a lot more detail - I highly recommend reading the series. I thought to write this blog post to share what I learned (and as a reference for my future self). I realized that, despite understanding the rules of multithreading in Kotlin Native, I didn’t fully grasp the implications thereof. In the past few days, I began looking at multithreading in Kotlin Multiplatform more carefully when I started a new iOS/Android project that I wanted to share business logic for.
#SWIFT SHARE ARRAY BETWEEN THREADS UPDATE#
Update - i did a small presentation about this as part of TouchlabShare - you can watch the video here. Because the initializer is throwing, we use the try? keyword and optional binding to safely access the result of the initialization.Multithreading in Kotlin Multiplatform Apps We initialize a Data object by invoking the init(contentsOf:) initializer. The first strategy is as simple as it gets.
#SWIFT SHARE ARRAY BETWEEN THREADS DOWNLOAD#
I want to show you two strategies to download an image from a remote server. Strategy 1: Using the Data Struct to Download Images This is an example so we are not focused on safety. Notice that we forced unwrap the result of the initialization. You should not hard code the URL of a remote resource in the project if you can avoid it. Your application usually obtains the URL of the remote image from an API of some sort. We start by creating a URL object that points to the remote image. We download an image in the view controller's viewDidLoad() method, but this is usually not what you want. When it's appropriate for an application to download remote resources, such as images, differs from application to application.
Open ViewController.swift and navigate to the viewDidLoad() method.
With the user interface in place, we can focus on downloading an image and displaying it in the image view. Select the image view, open the Attributes Inspector on the right, and set Content Mode to Aspect Fit. Connect the imageView outlet to the image view in the View Controller scene.īefore we move on, we need to configure the image view. Select the view controller in the storyboard and open the Connections Inspector on the right. Pin the image view to the edges of the view controller's view. Open Main.storyboard, click the Library button in the top right, and add an image view to the View Controller scene. The view controller downloads an image from a URL and displays it in its image view. Open ViewController.swift and create an outlet with name imageView of type UIImageView!, an implicitly unwrapped optional. Tell Xcode where you would like to save the project and click the Create button. Leave the checkboxes at the bottom unchecked. Name the project Images and set User Interface to Storyboard. from Xcode's File menu and choose the Single View App template from the iOS > Application section. This post focuses on the basics, that is, How does an application download an image from a URL in Swift? Let's start with a blank Xcode project. I show you the pros and cons of each solution and, most importantly, which pitfalls to avoid.
#SWIFT SHARE ARRAY BETWEEN THREADS HOW TO#
In this series, I show you how to download images using Swift. Most applications need to fetch data from a remote server and downloading images is a very common task applications need to perform.
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