Download image from server ios swift

Chose a descriptive name, something like downloadImage and press Connect :. If you see an error, simply build the project, after which Xcode will recognize the Alamofire module. For simplicity we will use an image bundled with our application, the tree. Usually, no server will let you upload an image without some form of authentication. In order to be able to use this local server, we need to add an exception for our localhost.

In Xcode, right click on Info. Open the FetchableImage. First, we use the global background thread for our task. Note: Read more about higher order functions here. Notice that the above implementation is based on the assumption that the imageURLs parameter value contains the URLs of the images that should be deleted. In such scenario, we would need to create a new method:. As you understand, each FetchableImageOptions item in the multipleOptions array will match to a single file with custom file name.

Finally, go to the ContactListView. In the action closure call the deleteAllAvatars :. That last method is not something that we need in order to use the FetchableImage protocol; however it would be nice to exist, so we can save custom images if necessary without having to come up with new solutions while developing an app.

So, open the FetchableImage. If the URL to the actual file name cannot be formed or writing to file fails, we return false. If writing image data to file succeeds though, then we return true. FetchableImage protocol is now complete, and that brings us to the end of this post. I hope you enjoyed this step-by-step implementation of a really handy tool, which hopefully will fit in your own projects.

For reference, you can download the complete project on GitHub. If you want to go even further, you can make it a reusable library and wrap it up in a Swift package. Thanks for reading! Using Swift of course! Except for the protocol that will be the primary and most important custom type, there will be two additional custom types, two structures : The first one will be used to specify optionally some settings. Let me describe fast its various parts starting from the views: UserView : A custom view with an Image and a Text that will display an avatar image and the contact name.

RandomContactView : A view that besides the UserView , also contains a button that triggers the selection of a contact randomly. ContactListView : The primary component here is a List that will be displaying a list of contacts. This view is embedded in a navigation view with two bar items; one for initiating the fetching process, and one for deleting all fetched avatars.

When tapping on any contact item, the ContactDetailsView will be shown. Additionally, it contains another custom view, the ProgressView , which will display visually the download progress of all avatars. ProgressView : A custom implementation of a progress bar. Tabs : FetchableImageDemo is a tab bar application, and Tabs view is the one creating the tabs. It contains an id , name , avatarURL , and avatar. It conforms to Decodable protocol so fake contact data can be loaded and decoded from the two JSON files included in the project, and also conforms to Identifiable protocol in order to easily iterate through such objects in the ContactListView using a ForEach loop.

Image systemName : "arrow. Button contact. Image systemName : "trash". Kingfisher is one of the best library for load image into URL.

Kamani Jasmin Kamani Jasmin 8 8 silver badges 11 11 bronze badges. Abdullah Mohammad Daihan 79 1 1 silver badge 5 5 bronze badges. Amro Jaber Amro Jaber 1 1 silver badge 12 12 bronze badges. Nikunj Kumbhani Nikunj Kumbhani 3, 1 1 gold badge 21 21 silver badges 45 45 bronze badges. The only that worked with me. How do you handle occasional cleanups of the download folder? Reloading of images happens faster and smoother compared to NSCache. But it'd prefer not to download images to the disk.

Anand Khanpara. Naishta Naishta Yes, By using background thread we can optimize the speed of downloading and If required we can change the logic instead of this we can use sdWebImage or other framework. A method for getting the image that is safe and works with Swift 2. Ben Patch Ben Patch 1, 8 8 silver badges 11 11 bronze badges. Usage: newsImage. Raj Salla Raj Salla 63 6 6 bronze badges. Shruti Thombre Shruti Thombre 3 3 gold badges 11 11 silver badges 27 27 bronze badges.

Abhimanyu Rathore Abhimanyu Rathore 12 12 silver badges 19 19 bronze badges. Hamid Shahsavari Hamid Shahsavari 1, 21 21 silver badges 32 32 bronze badges. Gurjinder Singh Gurjinder Singh 6, 50 50 silver badges 47 47 bronze badges. The only things there is missing is a! Simon Jensen Simon Jensen 73 7 7 bronze badges. Sorry for the late reply, could you be more precise on what errors you get? DocumentDirectory, inDomain:. Community Bot 1 1 1 silver badge. Crashalot Crashalot The Overflow Blog.

Introducing Content Health, a new way to keep the knowledge base up-to-date. This view will have a model that takes in the URL, retrieves it, then saved it to a published variable. The view can then display a default image for when the data is loading, and it will automatically update when the image loads. The code for this look like the following:. This is obviously not what we want to do, and we can very easily fix this with a cache.

This means that if our application is closed or the device needs to free up memory, the cache will be deleted. I made a brand new storyboard based Swift 5. Here's a quick summary:.

I hope you get my point. Please don't forget that the Foundation networking layer comes with four types of session tasks. You should always use the right one that fits the job. You might say that this is an edge case since most of the images even HD ones are maximum a few hundred kilobytes. Still, my takeaway here is that we can do better, and we should always do so if possible. Modern times require modern APIs, right? If you are already familiar with the new SDK that's good, but if you don't know what the heck is this declarative functional reactive madness, you should read my comprehensive tutorial about the Combine framework.

Wait, where are the others? No download task publisher? What should we do now? Another great read even better than the first one by Donny Wals is about understanding Publishers and Subscribers.

It's a really well-written article, you should definitely check this one, I highly recommend it. Now let's start creating our own DownloadTaskPublisher. There is also a DataTaskPublisher struct, right below. Based on that template we can create our own extension. There are two variants of the same data task method, we'll replicate this behavior.